JK BMS B2A20S20P Heat CAN/RS485 problem with connection

[Tesla72PL]

Hello, I uploaded the following code for ESP8266 D1 mini and unfortunately nothing works - what am I doing wrong?

substitutions:
  name: jk-bms
  device_description: "Monitor a JK-BMS via UART-TTL"
  external_components_source: github://syssi/esphome-jk-bms@main
  tx_pin: GPIO1
  rx_pin: GPIO3

esphome:
  name: ${name}
  comment: ${device_description}
  project:
    name: "syssi.esphome-jk-bms"
    version: 1.4.0

esp8266:
  board: d1_mini

external_components:
  - source: ${external_components_source}
    refresh: 0s

api:
  encryption:
    key: "..."

ota:
  password: "..."

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Jk-Battery-01-Info"
    password: "..."

logger:
  baud_rate: 0
  level: DEBUG

# If you use Home Assistant please remove this `mqtt` section and uncomment the `api` component!
# The native API has many advantages over MQTT: https://esphome.io/components/api.html#advantages-over-mqtt

uart:
  - id: uart0
    baud_rate: 115200
    rx_buffer_size: 384
    tx_pin: ${tx_pin}
    rx_pin: ${rx_pin}
    debug:
     direction: BOTH

jk_modbus:
  - id: modbus0
    uart_id: uart0
    rx_timeout: 50ms

jk_bms:
  - id: bms0
    jk_modbus_id: modbus0
    update_interval: 5s

binary_sensor:
  - platform: jk_bms
    balancing:
      name: "${name} balancing"
    balancing_switch:
      name: "${name} balancing switch"
    charging:
      name: "${name} charging"
    charging_switch:
      name: "${name} charging switch"
    discharging:
      name: "${name} discharging"
    discharging_switch:
      name: "${name} discharging switch"
    dedicated_charger_switch:
      name: "${name} dedicated charger switch"
    online_status:
      name: "${name} online status"

sensor:
  - platform: jk_bms
    min_cell_voltage:
      name: "${name} min cell voltage"
    max_cell_voltage:
      name: "${name} max cell voltage"
    min_voltage_cell:
      name: "${name} min voltage cell"
    max_voltage_cell:
      name: "${name} max voltage cell"
    delta_cell_voltage:
      name: "${name} delta cell voltage"
    average_cell_voltage:
      name: "${name} average cell voltage"
    cell_voltage_1:
      name: "${name} cell voltage 1"
    cell_voltage_2:
      name: "${name} cell voltage 2"
    cell_voltage_3:
      name: "${name} cell voltage 3"
    cell_voltage_4:
      name: "${name} cell voltage 4"
    cell_voltage_5:
      name: "${name} cell voltage 5"
    cell_voltage_6:
      name: "${name} cell voltage 6"
    cell_voltage_7:
      name: "${name} cell voltage 7"
    cell_voltage_8:
      name: "${name} cell voltage 8"
    cell_voltage_9:
      name: "${name} cell voltage 9"
    cell_voltage_10:
      name: "${name} cell voltage 10"
    cell_voltage_11:
      name: "${name} cell voltage 11"
    cell_voltage_12:
      name: "${name} cell voltage 12"
    cell_voltage_13:
      name: "${name} cell voltage 13"
    cell_voltage_14:
      name: "${name} cell voltage 14"
    cell_voltage_15:
      name: "${name} cell voltage 15"
    cell_voltage_16:
      name: "${name} cell voltage 16"
    cell_voltage_17:
      name: "${name} cell voltage 17"
    cell_voltage_18:
      name: "${name} cell voltage 18"
    cell_voltage_19:
      name: "${name} cell voltage 19"
    cell_voltage_20:
      name: "${name} cell voltage 20"
    cell_voltage_21:
      name: "${name} cell voltage 21"
    cell_voltage_22:
      name: "${name} cell voltage 22"
    cell_voltage_23:
      name: "${name} cell voltage 23"
    cell_voltage_24:
      name: "${name} cell voltage 24"
    power_tube_temperature:
      name: "${name} power tube temperature"
    temperature_sensor_1:
      name: "${name} temperature sensor 1"
    temperature_sensor_2:
      name: "${name} temperature sensor 2"
    total_voltage:
      name: "${name} total voltage"
    current:
      name: "${name} current"
    power:
      name: "${name} power"
    charging_power:
      name: "${name} charging power"
    discharging_power:
      name: "${name} discharging power"
    capacity_remaining:
      name: "${name} capacity remaining"
    capacity_remaining_derived:
      name: "${name} capacity remaining derived"
    temperature_sensors:
      name: "${name} temperature sensors"
    charging_cycles:
      name: "${name} charging cycles"
    total_charging_cycle_capacity:
      name: "${name} total charging cycle capacity"
    battery_strings:
      name: "${name} battery strings"
    errors_bitmask:
      name: "${name} errors bitmask"
    operation_mode_bitmask:
      name: "${name} operation mode bitmask"
    total_voltage_overvoltage_protection:
      name: "${name} total voltage overvoltage protection"
    total_voltage_undervoltage_protection:
      name: "${name} total voltage undervoltage protection"
    cell_voltage_overvoltage_protection:
      name: "${name} cell voltage overvoltage protection"
    cell_voltage_overvoltage_recovery:
      name: "${name} cell voltage overvoltage recovery"
    cell_voltage_overvoltage_delay:
      name: "${name} cell voltage overvoltage delay"
    cell_voltage_undervoltage_protection:
      name: "${name} cell voltage undervoltage protection"
    cell_voltage_undervoltage_recovery:
      name: "${name} cell voltage undervoltage recovery"
    cell_voltage_undervoltage_delay:
      name: "${name} cell voltage undervoltage delay"
    cell_pressure_difference_protection:
      name: "${name} cell pressure difference protection"
    discharging_overcurrent_protection:
      name: "${name} discharging overcurrent protection"
    discharging_overcurrent_delay:
      name: "${name} discharging overcurrent delay"
    charging_overcurrent_protection:
      name: "${name} charging overcurrent protection"
    charging_overcurrent_delay:
      name: "${name} charging overcurrent delay"
    balance_starting_voltage:
      name: "${name} balance starting voltage"
    balance_opening_pressure_difference:
      name: "${name} balance opening pressure difference"
    power_tube_temperature_protection:
      name: "${name} power tube temperature protection"
    power_tube_temperature_recovery:
      name: "${name} power tube temperature recovery"
    temperature_sensor_temperature_protection:
      name: "${name} temperature sensor temperature protection"
    temperature_sensor_temperature_recovery:
      name: "${name} temperature sensor temperature recovery"
    temperature_sensor_temperature_difference_protection:
      name: "${name} temperature sensor temperature difference protection"
    charging_high_temperature_protection:
      name: "${name} charging high temperature protection"
    discharging_high_temperature_protection:
      name: "${name} discharging high temperature protection"
    charging_low_temperature_protection:
      name: "${name} charging low temperature protection"
    charging_low_temperature_recovery:
      name: "${name} charging low temperature recovery"
    discharging_low_temperature_protection:
      name: "${name} discharging low temperature protection"
    discharging_low_temperature_recovery:
      name: "${name} discharging low temperature recovery"
    total_battery_capacity_setting:
      name: "${name} total battery capacity setting"
    current_calibration:
      name: "${name} current calibration"
    device_address:
      name: "${name} device address"
    sleep_wait_time:
      name: "${name} sleep wait time"
    alarm_low_volume:
      name: "${name} alarm low volume"
    manufacturing_date:
      name: "${name} manufacturing date"
    total_runtime:
      name: "${name} total runtime"
#    start_current_calibration:
#      name: "${name} start current calibration"
    actual_battery_capacity:
      name: "${name} actual battery capacity"
#    protocol_version:
#      name: "${name} protocol version"

text_sensor:
  - platform: jk_bms
    errors:
      name: "${name} errors"
    operation_mode:
      name: "${name} operation mode"
    battery_type:
      name: "${name} battery type"
    password:
      name: "${name} password"
    device_type:
      name: "${name} device type"
    software_version:
      name: "${name} software version"
    manufacturer:
      name: "${name} manufacturer"
    total_runtime_formatted:
      name: "${name} total runtime formatted"

[Tesla72PL]

[syssi]

Please check the controls tab of the Android app.Do you see here a switch to choose between CAN and RS485?

[Tesla72PL]

I have setting rs485, wires is connect to esp rx->tx and tx>rx and ground like on your photo in readme.

[syssi]

Where did you buy the BMS?

[Tesla72PL]

Hankzor I wonder if this rs485 port is working, because perhaps it is damaged, and I do not know how to check it.

Esp8266 works after loading a file directly from the computer, it connects to wi-fi. Then I check if there is a connection via wi-fi after disconnecting from the computer and without connecting to the RS485 port of the bms - it continues to connect properly. When I connect to the bms, once there something happens and it stops working and no longer connects via wi-fi....

[syssi]

Good question. In general your setup should work:

1. Your wiring sounds correct
2. You are using the hardware UART of an ESP8266 + the logger doesn't write to GPIO1/3 because of baud_rate: 0
3. You did enable the RS485 switch. This switch is new and wasn't available in the past.

Could you enable the debug mode of the uart component and provide some logs:

logger:
  baud_rate: 0
  level: DEBUG

uart:
  id: uart0
  baud_rate: 115200
  rx_buffer_size: 384
  tx_pin: ${tx_pin}
  rx_pin: ${rx_pin}
  debug:
    direction: BOTH

I would like to know there is no response at all or noise.

[syssi]

When I connect to the bms, once there something happens and it stops working and no longer connects via wi-fi....

That's not good! How do you power the ESP?

[Tesla72PL]

When I connect to the bms, once there something happens and it stops working and no longer connects via wi-fi....

That's not good! How do you power the ESP?

By usb type c connect 5V

[syssi]

Do you mean a USB power plug? I would like to make sure you don't power the ESP using the battery + buck converter.

[Tesla72PL]

Do you mean a USB power plug? I would like to make sure you don't power the ESP using the battery + buck converter.

Yes with usb plug, i know in other case i must power with 3,3V

[Tesla72PL]

Good question. In general your setup should work:

1. Your wiring sounds correct
2. You are using the hardware UART of an ESP8266 + the logger doesn't write to GPIO1/3 because of baud_rate: 0
3. You did enable the RS485 switch. This switch is new and wasn't available in the past.

Could you enable the debug mode of the uart component and provide some logs:

logger:
  baud_rate: 0
  level: DEBUG

uart:
  id: uart0
  baud_rate: 115200
  rx_buffer_size: 384
  tx_pin: ${tx_pin}
  rx_pin: ${rx_pin}
  debug:
    direction: BOTH

I would like to know there is no response at all or noise.

Ok, when i come back from work i try it 👍🏼

[Tesla72PL]

logs_jk-battery-01-info_logs_without_connect_bms.txt logs_jk-battery-01-info_logs_with_bms.txt jk-battery-01-info.yaml.txt

When Esp is connect with bms by wire i cant install .

logs_jk-battery-01-info_run.txt

I have to disconnect the cable to do anything

and very often i have after re-conect to bms something it:

logs_jk-battery-01-info_logs.txt

[syssi]

Your wiring looks good but the labels of your BMS are confusing. My left port is labeled as "CAN". The right port is labeled as GPS/RS485. May be the hardware layout has changed?!

[Tesla72PL]

Rather not, the CAN/RS485 port on the left is a secondary port. I think it's most likely, however, that the default port is broken, so probably nothing will be done here, and I don't have the money to buy another bms, so thanks anyway for showing interest....

from HANZKOR I also received this document - maybe it will be useful to you, for me it is dark magic 485.pdf

[syssi]

I know the protocol description. It's the implemented protocol for the UART-TTL connection.

[syssi]

Could you do some measurements? I would like a complete documentation of your issue here.

1. Please measure the voltage between GND <-> RX GND <-> TX GND <-> VBAT
2. Please measure the resistance between GND <-> RX GND <-> TX

[Tesla72PL]

Take measurements resistance on the device on or off?

[syssi]

On.

[Tesla72PL]

the voltage when BMS was turn on GND <-> RX 3,31V GND <-> TX 3,32V GND <-> VBAT50,21V the resistance when BMS was turn on GND <-> RX 95,48 ohm GND <-> TX 0,00 ohm

the resistance when BMS was turn off GND <-> RX 6,19 kohm GND <-> TX 3,11 Mohm

[kev300]

It is also the GPS port for my bms. Did you try other GPIOs on the ESP?

[Tesla72PL]

I order new BMS and we wil know all 😉

[maxsarges]

Hi,

i have a JK-BD6A20S10P. This works fine with the Bluetooth module.

I know wanted to connect it through RS485 also. I got stuck at the same Point. Connecting it to the "GPS" Port with the jst Connector but no Communication.

Mine looks the same as the above picture shows, but i don't have the settings in the APP (CAN/RS485).

When i connect everything my ESP still produces LOG files, so i guess it doesn't hang up like yours.

I will try some more things, including Voltage and resistance Measurements, but any idea is welcomed!

Waiting for your test's with your newly orderd BMS.

kind Regards Max

[syssi]

@maxsarges Please provide the software and hardware version of your BMS too. I guess the CAN/RS485 switch is available since firmware version 11.

[maxsarges]

Hi,

I have Version 10, maybe thats the reason why i don't have the Button.

I have also checked for an App Update, but i have latest one.

[Tesla72PL]

OK, I bought and instal JK-B1a20s15p, and i have now this error on the end

INFO Reading configuration /config/esphome/jk-bms.yaml...
INFO Updating https://github.com/syssi/esphome-jk-bms.git@main
INFO Starting log output from jk-bms.local using esphome API
INFO Successfully connected to jk-bms.local
[19:10:21][I][app:102]: ESPHome version 2023.4.3 compiled on May  2 2023, 19:02:08
[19:10:21][I][app:104]: Project syssi.esphome-jk-bms version 1.4.0
[19:10:21][C][wifi:505]: WiFi:
[19:10:21][C][wifi:363]:   Local MAC: 08:3A:8D:CC:CC:FA
[19:10:21][C][wifi:364]:   SSID: [redacted]
[19:10:21][C][wifi:365]:   IP Address: 192.168.0.106
[19:10:21][C][wifi:366]:   BSSID: [redacted]
[19:10:21][C][wifi:368]:   Hostname: 'jk-bms'
[19:10:21][C][wifi:370]:   Signal strength: -37 dB ▂▄▆█
[19:10:21][C][wifi:374]:   Channel: 10
[19:10:21][C][wifi:375]:   Subnet: 255.255.255.0
[19:10:21][C][wifi:376]:   Gateway: 192.168.0.1
[19:10:21][C][wifi:377]:   DNS1: 192.168.0.1
[19:10:21][C][wifi:378]:   DNS2: 0.0.0.0
[19:10:21][C][logger:294]: Logger:
[19:10:21][C][logger:295]:   Level: DEBUG
[19:10:21][C][logger:296]:   Log Baud Rate: 0
[19:10:21][C][logger:297]:   Hardware UART: UART0
[19:10:21][C][uart.arduino_esp8266:102]: UART Bus:
[19:10:21][C][uart.arduino_esp8266:103]:   TX Pin: GPIO1
[19:10:21][C][uart.arduino_esp8266:104]:   RX Pin: GPIO3
[19:10:21][C][uart.arduino_esp8266:106]:   RX Buffer Size: 384
[19:10:21][C][uart.arduino_esp8266:108]:   Baud Rate: 115200 baud
[19:10:21][C][uart.arduino_esp8266:109]:   Data Bits: 8
[19:10:21][C][uart.arduino_esp8266:110]:   Parity: NONE
[19:10:21][C][uart.arduino_esp8266:111]:   Stop bits: 1
[19:10:21][C][uart.arduino_esp8266:113]:   Using hardware serial interface.
[19:10:21][C][jk_modbus:097]: JkModbus:
[19:10:21][C][jk_modbus:098]:   RX timeout: 50 ms
[19:10:21][C][jk_bms:578]: JkBms:
[19:10:21][C][jk_bms:579]:   Address: 0x4E
[19:10:21][C][jk_bms:580]:   Fake traffic enabled: NO
[19:10:21][C][jk_bms:581]: Minimum Cell Voltage 'jk-bms min cell voltage'
[19:10:21][C][jk_bms:581]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:581]:   State Class: 'measurement'
[19:10:21][C][jk_bms:581]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:581]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:582]: Maximum Cell Voltage 'jk-bms max cell voltage'
[19:10:21][C][jk_bms:582]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:582]:   State Class: 'measurement'
[19:10:21][C][jk_bms:582]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:582]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:583]: Minimum Voltage Cell 'jk-bms min voltage cell'
[19:10:21][C][jk_bms:583]:   State Class: 'measurement'
[19:10:21][C][jk_bms:583]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:583]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:583]:   Icon: 'mdi:battery-minus-outline'
[19:10:21][C][jk_bms:584]: Maximum Voltage Cell 'jk-bms max voltage cell'
[19:10:21][C][jk_bms:584]:   State Class: 'measurement'
[19:10:21][C][jk_bms:584]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:584]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:584]:   Icon: 'mdi:battery-plus-outline'
[19:10:21][C][jk_bms:585]: Delta Cell Voltage 'jk-bms delta cell voltage'
[19:10:21][C][jk_bms:585]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:585]:   State Class: 'measurement'
[19:10:21][C][jk_bms:585]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:585]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:586]: Average Cell Voltage 'jk-bms average cell voltage'
[19:10:21][C][jk_bms:586]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:586]:   State Class: 'measurement'
[19:10:21][C][jk_bms:586]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:586]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:587]: Cell Voltage 1 'jk-bms cell voltage 1'
[19:10:21][C][jk_bms:587]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:590]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:591]: Cell Voltage 5 'jk-bms cell voltage 5'
[19:10:21][C][jk_bms:591]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:591]:   State Class: 'measurement'
[19:10:21][C][jk_bms:591]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:591]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:592]: Cell Voltage 6 'jk-bms cell voltage 6'
[19:10:21][C][jk_bms:592]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:592]:   State Class: 'measurement'
[19:10:21][C][jk_bms:592]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:592]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:593]: Cell Voltage 7 'jk-bms cell voltage 7'
[19:10:21][C][jk_bms:593]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:593]:   State Class: 'measurement'
[19:10:21][C][jk_bms:593]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:593]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:594]: Cell Voltage 8 'jk-bms cell voltage 8'
[19:10:21][C][jk_bms:594]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:594]:   State Class: 'measurement'
[19:10:21][C][jk_bms:594]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:594]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:595]: Cell Voltage 9 'jk-bms cell voltage 9'
[19:10:21][C][jk_bms:595]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:595]:   State Class: 'measurement'
[19:10:21][C][jk_bms:595]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:595]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:596]: Cell Voltage 10 'jk-bms cell voltage 10'
[19:10:21][C][jk_bms:596]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:596]:   State Class: 'measurement'
[19:10:21][C][jk_bms:596]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:596]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:597]: Cell Voltage 11 'jk-bms cell voltage 11'
[19:10:21][C][jk_bms:597]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:597]:   State Class: 'measurement'
[19:10:21][C][jk_bms:597]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:597]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:600]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:600]:   State Class: 'measurement'
[19:10:21][C][jk_bms:600]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:600]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:601]: Cell Voltage 15 'jk-bms cell voltage 15'
[19:10:21][C][jk_bms:601]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:601]:   State Class: 'measurement'
[19:10:21][C][jk_bms:601]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:601]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:602]: Cell Voltage 16 'jk-bms cell voltage 16'
[19:10:21][C][jk_bms:602]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:602]:   State Class: 'measurement'
[19:10:21][C][jk_bms:602]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:602]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:603]: Cell Voltage 17 'jk-bms cell voltage 17'
[19:10:21][C][jk_bms:603]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:603]:   State Class: 'measurement'
[19:10:21][C][jk_bms:603]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:603]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:604]: Cell Voltage 18 'jk-bms cell voltage 18'
[19:10:21][C][jk_bms:604]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:604]:   State Class: 'measurement'
[19:10:21][C][jk_bms:604]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:604]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:605]: Cell Voltage 19 'jk-bms cell voltage 19'
[19:10:21][C][jk_bms:605]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:605]:   State Class: 'measurement'
[19:10:21][C][jk_bms:605]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:605]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:606]: Cell Voltage 20 'jk-bms cell voltage 20'
[19:10:21][C][jk_bms:606]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:606]:   State Class: 'measurement'
[19:10:21][C][jk_bms:606]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:606]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:607]: Cell Voltage 21 'jk-bms cell voltage 21'
[19:10:21][C][jk_bms:609]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:609]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:610]: Cell Voltage 24 'jk-bms cell voltage 24'
[19:10:21][C][jk_bms:610]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:610]:   State Class: 'measurement'
[19:10:21][C][jk_bms:610]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:610]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:611]: Power Tube Temperature 'jk-bms power tube temperature'
[19:10:21][C][jk_bms:611]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:611]:   State Class: 'measurement'
[19:10:21][C][jk_bms:611]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:611]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:612]: Temperature Sensor 1 'jk-bms temperature sensor 1'
[19:10:21][C][jk_bms:612]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:612]:   State Class: 'measurement'
[19:10:21][C][jk_bms:612]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:612]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:613]: Temperature Sensor 2 'jk-bms temperature sensor 2'
[19:10:21][C][jk_bms:613]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:613]:   State Class: 'measurement'
[19:10:21][C][jk_bms:613]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:613]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:614]: Total Voltage 'jk-bms total voltage'
[19:10:21][C][jk_bms:614]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:614]:   State Class: 'measurement'
[19:10:21][C][jk_bms:614]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:614]:   Accuracy Decimals: 2
[19:10:21][C][jk_bms:615]: Current 'jk-bms current'
[19:10:21][C][jk_bms:615]:   Device Class: 'current'
[19:10:21][C][jk_bms:615]:   State Class: 'measurement'
[19:10:21][C][jk_bms:615]:   Unit of Measurement: 'A'
[19:10:21][C][jk_bms:615]:   Accuracy Decimals: 2
[19:10:21][C][jk_bms:615]:   Icon: 'mdi:current-dc'
[19:10:21][C][jk_bms:616]: Power 'jk-bms power'
[19:10:21][C][jk_bms:616]:   Device Class: 'power'
[19:10:21][C][jk_bms:618]:   Device Class: 'power'
[19:10:21][C][jk_bms:618]:   State Class: 'measurement'
[19:10:21][C][jk_bms:618]:   Unit of Measurement: 'W'
[19:10:21][C][jk_bms:618]:   Accuracy Decimals: 2
[19:10:21][C][jk_bms:619]: Capacity Remaining 'jk-bms capacity remaining'
[19:10:21][C][jk_bms:619]:   State Class: 'measurement'
[19:10:21][C][jk_bms:619]:   Unit of Measurement: '%'
[19:10:21][C][jk_bms:619]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:619]:   Icon: 'mdi:battery-50'
[19:10:21][C][jk_bms:620]: Capacity Remaining Derived 'jk-bms capacity remaining derived'
[19:10:21][C][jk_bms:620]:   State Class: 'measurement'
[19:10:21][C][jk_bms:620]:   Unit of Measurement: 'Ah'
[19:10:21][C][jk_bms:620]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:620]:   Icon: 'mdi:battery-50'
[19:10:21][C][jk_bms:621]: Temperature Sensors 'jk-bms temperature sensors'
[19:10:21][C][jk_bms:621]:   State Class: 'measurement'
[19:10:21][C][jk_bms:621]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:621]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:622]: Charging Cycles 'jk-bms charging cycles'
[19:10:21][C][jk_bms:622]:   State Class: 'measurement'
[19:10:21][C][jk_bms:622]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:622]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:622]:   Icon: 'mdi:battery-sync'
[19:10:21][C][jk_bms:623]: Total Charging Cycle Capacity 'jk-bms total charging cycle capacity'
[19:10:21][C][jk_bms:623]:   State Class: 'measurement'
[19:10:21][C][jk_bms:623]:   Unit of Measurement: 'Ah'
[19:10:21][C][jk_bms:623]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:623]:   Icon: 'mdi:counter'
[19:10:21][C][jk_bms:624]: Battery Strings 'jk-bms battery strings'
[19:10:21][C][jk_bms:624]:   State Class: 'measurement'
[19:10:21][C][jk_bms:624]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:624]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:624]:   Icon: 'mdi:car-battery'
[19:10:21][C][jk_bms:625]: Errors Bitmask 'jk-bms errors bitmask'
[19:10:21][C][jk_bms:625]:   Icon: 'mdi:alert-circle-outline'
[19:10:21][C][jk_bms:626]: Operation Mode Bitmask 'jk-bms operation mode bitmask'
[19:10:21][C][jk_bms:626]:   State Class: 'measurement'
[19:10:21][C][jk_bms:626]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:626]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:626]:   Icon: 'mdi:heart-pulse'
[19:10:21][C][jk_bms:627]: Total Voltage Overvoltage Protection 'jk-bms total voltage overvoltage protection'
[19:10:21][C][jk_bms:627]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:627]:   State Class: 'measurement'
[19:10:21][C][jk_bms:627]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:627]:   Accuracy Decimals: 2
[19:10:21][C][jk_bms:628]: Total Voltage Undervoltage Protection 'jk-bms total voltage undervoltage protection'
[19:10:21][C][jk_bms:628]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:628]:   State Class: 'measurement'
[19:10:21][C][jk_bms:628]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:628]:   Accuracy Decimals: 2
[19:10:21][C][jk_bms:629]: Cell Voltage Overvoltage Protection 'jk-bms cell voltage overvoltage protection'
[19:10:21][C][jk_bms:629]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:629]:   State Class: 'measurement'
[19:10:21][C][jk_bms:629]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:629]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:630]: Cell Voltage Overvoltage Recovery 'jk-bms cell voltage overvoltage recovery'
[19:10:21][C][jk_bms:630]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:630]:   State Class: 'measurement'
[19:10:21][C][jk_bms:630]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:630]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:631]: Cell Voltage Overvoltage Delay 'jk-bms cell voltage overvoltage delay'
[19:10:21][C][jk_bms:631]:   State Class: 'measurement'
[19:10:21][C][jk_bms:631]:   Unit of Measurement: 's'
[19:10:21][C][jk_bms:631]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:631]:   Icon: 'mdi:timelapse'
[19:10:21][C][jk_bms:632]: Cell Voltage Undervoltage Protection 'jk-bms cell voltage undervoltage protection'
[19:10:21][C][jk_bms:633]: Cell Voltage Undervoltage Recovery 'jk-bms cell voltage undervoltage recovery'
[19:10:21][C][jk_bms:633]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:633]:   State Class: 'measurement'
[19:10:21][C][jk_bms:633]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:633]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:634]: Cell Voltage Undervoltage Delay 'jk-bms cell voltage undervoltage delay'
[19:10:21][C][jk_bms:634]:   State Class: 'measurement'
[19:10:21][C][jk_bms:634]:   Unit of Measurement: 's'
[19:10:21][C][jk_bms:634]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:634]:   Icon: 'mdi:timelapse'
[19:10:21][C][jk_bms:635]: Cell Pressure Difference Protection 'jk-bms cell pressure difference protection'
[19:10:21][C][jk_bms:635]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:635]:   State Class: 'measurement'
[19:10:21][C][jk_bms:635]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:635]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:636]: Discharging Overcurrent Protection 'jk-bms discharging overcurrent protection'
[19:10:21][C][jk_bms:636]:   Device Class: 'current'
[19:10:21][C][jk_bms:636]:   State Class: 'measurement'
[19:10:21][C][jk_bms:636]:   Unit of Measurement: 'A'
[19:10:21][C][jk_bms:636]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:636]:   Icon: 'mdi:current-dc'
[19:10:21][C][jk_bms:637]: Discharging Overcurrent Delay 'jk-bms discharging overcurrent delay'
[19:10:21][C][jk_bms:637]:   State Class: 'measurement'
[19:10:21][C][jk_bms:637]:   Unit of Measurement: 's'
[19:10:21][C][jk_bms:637]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:637]:   Icon: 'mdi:timelapse'
[19:10:21][C][jk_bms:638]: Charging Overcurrent Protection 'jk-bms charging overcurrent protection'
[19:10:21][C][jk_bms:638]:   Device Class: 'current'
[19:10:21][C][jk_bms:638]:   State Class: 'measurement'
[19:10:21][C][jk_bms:638]:   Unit of Measurement: 'A'
[19:10:21][C][jk_bms:638]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:638]:   Icon: 'mdi:current-dc'
[19:10:21][C][jk_bms:639]: Charging Overcurrent Delay 'jk-bms charging overcurrent delay'
[19:10:21][C][jk_bms:641]: Balance Opening Pressure Difference 'jk-bms balance opening pressure difference'
[19:10:21][C][jk_bms:641]:   Device Class: 'voltage'
[19:10:21][C][jk_bms:641]:   State Class: 'measurement'
[19:10:21][C][jk_bms:641]:   Unit of Measurement: 'V'
[19:10:21][C][jk_bms:641]:   Accuracy Decimals: 3
[19:10:21][C][jk_bms:642]: Power Tube Temperature Protection 'jk-bms power tube temperature protection'
[19:10:21][C][jk_bms:642]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:642]:   State Class: 'measurement'
[19:10:21][C][jk_bms:642]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:642]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:643]: Power Tube Temperature Recovery 'jk-bms power tube temperature recovery'
[19:10:21][C][jk_bms:643]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:643]:   State Class: 'measurement'
[19:10:21][C][jk_bms:643]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:643]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:644]: Temperature Sensor Temperature Protection 'jk-bms temperature sensor temperature protection'
[19:10:21][C][jk_bms:644]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:644]:   State Class: 'measurement'
[19:10:21][C][jk_bms:644]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:644]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:645]: Temperature Sensor Temperature Recovery 'jk-bms temperature sensor temperature recovery'
[19:10:21][C][jk_bms:645]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:645]:   State Class: 'measurement'
[19:10:21][C][jk_bms:645]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:645]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:646]: Temperature Sensor Temperature Difference Protection 'jk-bms temperature sensor temperature difference protection'
[19:10:21][C][jk_bms:646]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:646]:   State Class: 'measurement'
[19:10:21][C][jk_bms:646]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:646]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:648]: Charging High Temperature Protection 'jk-bms charging high temperature protection'
[19:10:21][C][jk_bms:648]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:649]: Discharging High Temperature Protection 'jk-bms discharging high temperature protection'
[19:10:21][C][jk_bms:649]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:649]:   State Class: 'measurement'
[19:10:21][C][jk_bms:649]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:649]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:650]: Charging Low Temperature Protection 'jk-bms charging low temperature protection'
[19:10:21][C][jk_bms:650]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:650]:   State Class: 'measurement'
[19:10:21][C][jk_bms:650]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:650]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:651]: Charging Low Temperature Recovery 'jk-bms charging low temperature recovery'
[19:10:21][C][jk_bms:651]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:651]:   State Class: 'measurement'
[19:10:21][C][jk_bms:651]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:651]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:652]: Discharging Low Temperature Protection 'jk-bms discharging low temperature protection'
[19:10:21][C][jk_bms:652]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:652]:   State Class: 'measurement'
[19:10:21][C][jk_bms:652]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:652]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:653]: Discharging Low Temperature Recovery 'jk-bms discharging low temperature recovery'
[19:10:21][C][jk_bms:653]:   Device Class: 'temperature'
[19:10:21][C][jk_bms:653]:   State Class: 'measurement'
[19:10:21][C][jk_bms:653]:   Unit of Measurement: '°C'
[19:10:21][C][jk_bms:653]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:654]: Total Battery Capacity Setting 'jk-bms total battery capacity setting'
[19:10:21][C][jk_bms:654]:   State Class: 'measurement'
[19:10:21][C][jk_bms:654]:   Unit of Measurement: 'Ah'
[19:10:21][C][jk_bms:654]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:654]:   Icon: 'mdi:battery-sync'
[19:10:21][C][jk_bms:659]:   State Class: 'measurement'
[19:10:21][C][jk_bms:659]:   Unit of Measurement: '%'
[19:10:21][C][jk_bms:659]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:659]:   Icon: 'mdi:volume-high'
[19:10:21][C][jk_bms:660]: Password 'jk-bms password'
[19:10:21][C][jk_bms:660]:   Icon: 'mdi:lock-outline'
[19:10:21][C][jk_bms:661]: Device Type 'jk-bms device type'
[19:10:21][C][jk_bms:662]: Manufacturing Date 'jk-bms manufacturing date'
[19:10:21][C][jk_bms:662]:   State Class: 'measurement'
[19:10:21][C][jk_bms:662]:   Unit of Measurement: ''
[19:10:21][C][jk_bms:662]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:663]: Total Runtime 'jk-bms total runtime'
[19:10:21][C][jk_bms:663]:   State Class: 'total_increasing'
[19:10:21][C][jk_bms:663]:   Unit of Measurement: 'h'
[19:10:21][C][jk_bms:663]:   Accuracy Decimals: 0
[19:10:21][C][jk_bms:663]:   Icon: 'mdi:timelapse'
[19:10:21][C][jk_bms:664]: Software Version 'jk-bms software version'
[19:10:21][C][jk_bms:666]: Manufacturer 'jk-bms manufacturer'
[19:10:21][C][jk_bms:668]: Balancing 'jk-bms balancing'
[19:10:21][C][jk_bms:669]: Balancing Switch 'jk-bms balancing switch'
[19:10:21][C][jk_bms:670]: Charging 'jk-bms charging'
[19:10:21][C][jk_bms:671]: Charging Switch 'jk-bms charging switch'
[19:10:21][C][jk_bms:672]: Discharging 'jk-bms discharging'
[19:10:21][C][jk_bms:673]: Discharging Switch 'jk-bms discharging switch'
[19:10:21][C][jk_bms:674]: Dedicated Charger Switch 'jk-bms dedicated charger switch'
[19:10:21][C][jk_bms:675]: Total Runtime Formatted 'jk-bms total runtime formatted'
[19:10:21][C][jk_bms:675]:   Icon: 'mdi:timelapse'
[19:10:21][C][mdns:108]: mDNS:
[19:10:21][C][mdns:109]:   Hostname: jk-bms
[19:10:21][C][ota:093]: Over-The-Air Updates:
[19:10:21][C][ota:094]:   Address: jk-bms.local:8266
[19:10:21][C][ota:097]:   Using Password.
[19:10:21][C][api:138]: API Server:
[19:10:21][C][api:139]:   Address: jk-bms.local:6053
[19:10:21][C][api:141]:   Using noise encryption: YES
[19:10:52][W][jk_modbus:050]: Invalid header
[19:11:07][W][jk_modbus:050]: Invalid header
[19:12:12][W][jk_modbus:050]: Invalid header

my ESP code:

substitutions:
  name: "jk-bms"
  device_description: "Monitor a JK-BMS via UART-TTL"
  external_components_source: github://syssi/esphome-jk-bms@main
  tx_pin: GPIO1
  rx_pin: GPIO3

esphome:
  name: ${name}
  comment: ${device_description}
  project:
    name: "syssi.esphome-jk-bms"
    version: 1.4.0

esp8266:
  board: d1_mini

external_components:
  - source: ${external_components_source}
    refresh: 0s

logger:
  baud_rate: 0
  level: DEBUG

api:
  encryption:
    key: "****"

ota:
  password: "****"

wifi:
  ssid: !secret wifi_ssid_1
  password: !secret wifi_password_1

  ap:
    ssid: "Jk-Battery-01-Info"
    password: "******"

uart:
  - id: uart_0
    baud_rate: 115200
    rx_buffer_size: 384
    tx_pin: ${tx_pin}
    rx_pin: ${rx_pin}

jk_modbus:
  - id: modbus0
    uart_id: uart_0
    rx_timeout: 50ms

jk_bms:
  - id: bms0
    jk_modbus_id: modbus0
    update_interval: 5s

binary_sensor:
  - platform: jk_bms
    balancing:
      name: "${name} balancing"
    balancing_switch:
      name: "${name} balancing switch"
    charging:
      name: "${name} charging"
    charging_switch:
      name: "${name} charging switch"
    discharging:
      name: "${name} discharging"
    discharging_switch:
      name: "${name} discharging switch"
    dedicated_charger_switch:
      name: "${name} dedicated charger switch"
    online_status:
      name: "${name} online status"

sensor:
  - platform: jk_bms
    min_cell_voltage:
      name: "${name} min cell voltage"
    max_cell_voltage:
      name: "${name} max cell voltage"
    min_voltage_cell:
      name: "${name} min voltage cell"
    max_voltage_cell:
      name: "${name} max voltage cell"
    delta_cell_voltage:
      name: "${name} delta cell voltage"
    average_cell_voltage:
      name: "${name} average cell voltage"
    cell_voltage_1:
      name: "${name} cell voltage 1"
    cell_voltage_2:
      name: "${name} cell voltage 2"
    cell_voltage_3:
      name: "${name} cell voltage 3"
    cell_voltage_4:
      name: "${name} cell voltage 4"
    cell_voltage_5:
      name: "${name} cell voltage 5"
    cell_voltage_6:
      name: "${name} cell voltage 6"
    cell_voltage_7:
      name: "${name} cell voltage 7"
    cell_voltage_8:
      name: "${name} cell voltage 8"
    cell_voltage_9:
      name: "${name} cell voltage 9"
    cell_voltage_10:
      name: "${name} cell voltage 10"
    cell_voltage_11:
      name: "${name} cell voltage 11"
    cell_voltage_12:
      name: "${name} cell voltage 12"
    cell_voltage_13:
      name: "${name} cell voltage 13"
    cell_voltage_14:
      name: "${name} cell voltage 14"
    cell_voltage_15:
      name: "${name} cell voltage 15"
    cell_voltage_16:
      name: "${name} cell voltage 16"
    cell_voltage_17:
      name: "${name} cell voltage 17"
    cell_voltage_18:
      name: "${name} cell voltage 18"
    cell_voltage_19:
      name: "${name} cell voltage 19"
    cell_voltage_20:
      name: "${name} cell voltage 20"
    cell_voltage_21:
      name: "${name} cell voltage 21"
    cell_voltage_22:
      name: "${name} cell voltage 22"
    cell_voltage_23:
      name: "${name} cell voltage 23"
    cell_voltage_24:
      name: "${name} cell voltage 24"
    power_tube_temperature:
      name: "${name} power tube temperature"
    temperature_sensor_1:
      name: "${name} temperature sensor 1"
    temperature_sensor_2:
      name: "${name} temperature sensor 2"
    total_voltage:
      name: "${name} total voltage"
    current:
      name: "${name} current"
    power:
      name: "${name} power"
    charging_power:
      name: "${name} charging power"
    discharging_power:
      name: "${name} discharging power"
    capacity_remaining:
      name: "${name} capacity remaining"
    capacity_remaining_derived:
      name: "${name} capacity remaining derived"
    temperature_sensors:
      name: "${name} temperature sensors"
    charging_cycles:
      name: "${name} charging cycles"
    total_charging_cycle_capacity:
      name: "${name} total charging cycle capacity"
    battery_strings:
      name: "${name} battery strings"
    errors_bitmask:
      name: "${name} errors bitmask"
    operation_mode_bitmask:
      name: "${name} operation mode bitmask"
    total_voltage_overvoltage_protection:
      name: "${name} total voltage overvoltage protection"
    total_voltage_undervoltage_protection:
      name: "${name} total voltage undervoltage protection"
    cell_voltage_overvoltage_protection:
      name: "${name} cell voltage overvoltage protection"
    cell_voltage_overvoltage_recovery:
      name: "${name} cell voltage overvoltage recovery"
    cell_voltage_overvoltage_delay:
      name: "${name} cell voltage overvoltage delay"
    cell_voltage_undervoltage_protection:
      name: "${name} cell voltage undervoltage protection"
    cell_voltage_undervoltage_recovery:
      name: "${name} cell voltage undervoltage recovery"
    cell_voltage_undervoltage_delay:
      name: "${name} cell voltage undervoltage delay"
    cell_pressure_difference_protection:
      name: "${name} cell pressure difference protection"
    discharging_overcurrent_protection:
      name: "${name} discharging overcurrent protection"
    discharging_overcurrent_delay:
      name: "${name} discharging overcurrent delay"
    charging_overcurrent_protection:
      name: "${name} charging overcurrent protection"
    charging_overcurrent_delay:
      name: "${name} charging overcurrent delay"
    balance_starting_voltage:
      name: "${name} balance starting voltage"
    balance_opening_pressure_difference:
      name: "${name} balance opening pressure difference"
    power_tube_temperature_protection:
      name: "${name} power tube temperature protection"
    power_tube_temperature_recovery:
      name: "${name} power tube temperature recovery"
    temperature_sensor_temperature_protection:
      name: "${name} temperature sensor temperature protection"
    temperature_sensor_temperature_recovery:
      name: "${name} temperature sensor temperature recovery"
    temperature_sensor_temperature_difference_protection:
      name: "${name} temperature sensor temperature difference protection"
    charging_high_temperature_protection:
      name: "${name} charging high temperature protection"
    discharging_high_temperature_protection:
      name: "${name} discharging high temperature protection"
    charging_low_temperature_protection:
      name: "${name} charging low temperature protection"
    charging_low_temperature_recovery:
      name: "${name} charging low temperature recovery"
    discharging_low_temperature_protection:
      name: "${name} discharging low temperature protection"
    discharging_low_temperature_recovery:
      name: "${name} discharging low temperature recovery"
    total_battery_capacity_setting:
      name: "${name} total battery capacity setting"
    current_calibration:
      name: "${name} current calibration"
    device_address:
      name: "${name} device address"
    sleep_wait_time:
      name: "${name} sleep wait time"
    alarm_low_volume:
      name: "${name} alarm low volume"
    manufacturing_date:
      name: "${name} manufacturing date"
    total_runtime:
      name: "${name} total runtime"
#    start_current_calibration:
#      name: "${name} start current calibration"
    actual_battery_capacity:
      name: "${name} actual battery capacity"
#    protocol_version:
#      name: "${name} protocol version"

text_sensor:
  - platform: jk_bms
    errors:
      name: "${name} errors"
    operation_mode:
      name: "${name} operation mode"
    battery_type:
      name: "${name} battery type"
    password:
      name: "${name} password"
    device_type:
      name: "${name} device type"
    software_version:
      name: "${name} software version"
    manufacturer:
      name: "${name} manufacturer"
    total_runtime_formatted:
      name: "${name} total runtime formatted"

[syssi]

Please enable the debug output of the uart component:

https://github.com/syssi/esphome-jk-bms#debugging

[Tesla72PL]

[20:58:27][C][mdns:109]:   Hostname: jk-bms
[20:58:27][C][ota:093]: Over-The-Air Updates:
[20:58:27][C][ota:094]:   Address: jk-bms.local:8266
[20:58:27][C][ota:097]:   Using Password.
[20:58:27][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:27][C][api:138]: API Server:
[20:58:27][C][api:139]:   Address: jk-bms.local:6053
[20:58:27][C][api:141]:   Using noise encryption: YES
[20:58:31][D][binary_sensor:036]: 'jk-bms online status': Sending state OFF
[20:58:31][D][text_sensor:064]: 'jk-bms errors': Sending state 'Offline'
[20:58:31][D][sensor:109]: 'jk-bms min cell voltage': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms max cell voltage': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms min voltage cell': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms max voltage cell': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms delta cell voltage': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms average cell voltage': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms power tube temperature': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensor 1': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensor 2': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total voltage': Sending state nan V with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms current': Sending state nan A with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms power': Sending state nan W with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging power': Sending state nan W with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging power': Sending state nan W with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms capacity remaining': Sending state nan % with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms capacity remaining derived': Sending state nan Ah with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensors': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging cycles': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total charging cycle capacity': Sending state nan Ah with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms battery strings': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms errors bitmask': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms operation mode bitmask': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total voltage overvoltage protection': Sending state nan V with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total voltage undervoltage protection': Sending state nan V with 2 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage overvoltage protection': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage overvoltage recovery': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage overvoltage delay': Sending state nan s with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage undervoltage protection': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage undervoltage recovery': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage undervoltage delay': Sending state nan s with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell pressure difference protection': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging overcurrent protection': Sending state nan A with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging overcurrent delay': Sending state nan s with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging overcurrent protection': Sending state nan A with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging overcurrent delay': Sending state nan s with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms balance starting voltage': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms balance opening pressure difference': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms power tube temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms power tube temperature recovery': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensor temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensor temperature recovery': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms temperature sensor temperature difference protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging high temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging high temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging low temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms charging low temperature recovery': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging low temperature protection': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms discharging low temperature recovery': Sending state nan °C with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total battery capacity setting': Sending state nan Ah with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms current calibration': Sending state nan A with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms device address': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms sleep wait time': Sending state nan s with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms alarm low volume': Sending state nan % with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms manufacturing date': Sending state nan  with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms total runtime': Sending state nan h with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms actual battery capacity': Sending state nan Ah with 0 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 1': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 2': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 3': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 4': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 5': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 6': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 7': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 8': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 9': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 10': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 11': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 12': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 13': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 14': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 15': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 16': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 17': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 18': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 19': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 20': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 21': Sending state nan V with 3 decimals of accuracy
[20:58:31][D][sensor:109]: 'jk-bms cell voltage 22': Sending state nan V with 3 decimals of accuracy
[20:58:32][D][sensor:109]: 'jk-bms cell voltage 23': Sending state nan V with 3 decimals of accuracy
[20:58:32][D][sensor:109]: 'jk-bms cell voltage 24': Sending state nan V with 3 decimals of accuracy
[20:58:32][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:35][D][api:102]: Accepted 192.168.0.20
[20:58:35][D][api.connection:961]: Home Assistant 2023.4.6 (192.168.0.20): Connected successfully
[20:58:36][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:41][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:46][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:51][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:58:56][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:59:01][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:59:06][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[20:59:11][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
WARNING jk-bms.local: Connection error occurred: [Errno 104] Connection reset by peer
INFO Processing unexpected disconnect from ESPHome API for jk-bms.local
WARNING Disconnected from API
WARNING Can't connect to ESPHome API for jk-bms.local: Error connecting to ('192.168.0.151', 6053): [Errno 113] Connect call failed ('192.168.0.151', 6053)
INFO Trying to reconnect to jk-bms.local in the background
INFO Successfully connected to jk-bms.local
[20:59:51][D][uart_debug:114]: <<< FF
[20:59:56][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:01][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:02][D][api:102]: Accepted 192.168.0.20
[21:00:06][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:11][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:16][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:16][W][jk_modbus:050]: Invalid header
[21:00:16][D][uart_debug:114]: <<< FF:FF:FF
[21:00:21][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:26][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:31][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:31][D][uart_debug:114]: <<< FF
[21:00:32][W][api.connection:075]: 192.168.0.20: Socket operation failed: CONNECTION_CLOSED errno=11
[21:00:36][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:41][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:46][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:51][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:00:56][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:01][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:01][D][uart_debug:114]: <<< FF
[21:01:06][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:11][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:16][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:21][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:26][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:26][D][uart_debug:114]: <<< FF
[21:01:31][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:32][D][api:102]: Accepted 192.168.0.20
[21:01:36][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:41][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:46][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:51][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:01:56][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:01][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:02][W][api.connection:075]: 192.168.0.20: Socket operation failed: CONNECTION_CLOSED errno=11
[21:02:06][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:11][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:16][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:21][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[21:02:26][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29

[Tesla72PL]

[syssi]

>>> indicates outgoing traffic (the cell info requests). <<< indicates incoming traffic.

It looks like your new BMS doesn't respond too. The received 0xFF looks like garbage. Please double check your data cable and make sure GND is attached properly and the cable length is less than 10 centimeters.

[Tesla72PL]

I dont know why it is not working...

[Tesla72PL]

I change device to esp32 dev and... WORKING!!!! :) - i dont know why not working with ESP8266...

[syssi]

Does both devices work now?

[Tesla72PL]

No, only ESP32 work correctly

[syssi]

My question was about your BMS (first and second one).

[syssi]

Could you tell me the model name, software and hardware version of the working BMS? I would like to extend the docs.

[syssi]

Good job! And happy birthday(?) ;-)

[Tesla72PL]

I'll check it out when I swap them again - for now, I'm glad it's started at all

[Tesla72PL]

Good job! And happy birthday(?) ;-)

Thank you, but birthday of starting device - yes? My english is very weak so sorry 😊

[syssi]

Your screenshot contains a birthday cake at the top. I guessed it's your birthday today. ;-)

[Tesla72PL]

Your screenshot contains a birthday cake at the top. I guessed it's your birthday today. ;-)

Ha, ha , ha ok, now I understand - no, thats only reminder - my friend has a birthday :)

[Tesla72PL]

Ok, now I'm happy. UI Card work in HA - nice 😊😎

[JakobTewes]

Do you mean a USB power plug? I would like to make sure you don't power the ESP using the battery + buck converter.

@syssi, why shouldn’t a buck converter and battery power be used? asking this honestly after I grilled two esp32 and a buck converter 🫣.

[syssi]

@JakobTewes I cannot provide a good answer. I'm a software developer with limited skills in electrical circuits. I'm just aware of users who release magic smoke (destroyed the serial port of the BMS, ESP or buck converter).

[kev300]

Most buck convertes forward full input voltage to output if they fail, so there is that danger already. In addition they could output voltage spikes if the output capacitor is small. The serial connections are very sensitiv to voltage spikes. Especially those, which can't handle 5V logic level. (ESP, the JK-BMS are both 3.3V) And if a serial interface get's a spike and grills the controller, usually the controller creates a short after that. -> also kills the buck converter.

So maybe you can avoid this dangers with a big capacitor after the buck converter + zener diodes which limit max voltage in addition. They need to be stronger than the converter, so they don't break if the converter fails. 😁

[eMindFfM]

Hi all, looking at the new Version 11 from the JK-BMS I got this information:

Hello Torsten,I had talked with factory and our purchase manager again.They said for these two version,they are just different software, the function is the same.As for the two functions you mentioned, the software just reserves them, but they cannot be used. If you need to use it, we need to buy another version from the factory.

So it seems to be the case, that there are no new HW components yet, only the SW is updated.

[lucize]

I have the version with CAN switch to RS485 and I can confirm that it will activate the modebus protocol (as somehow I managed to damage the gps circuit) also I can read some holding registers using an usb adapter, but not all the values are present or I don't know how to read them (only 0-29 works), I'm waiting for a rs485 to ttl adapter to see if I can use it on esp

[syssi]

@lucize Could you provide the pinout of the CAN/RS485 port and a request + response example?

[lucize]

sorry, I'm not good with modebus, for the moment I have this:

can/rs485 | gps GND - B - A | ....

the temp is negative for my faulty board

edit: tried to use rs485 to ttl adapter and seems that no data is coming back (this is a fork to use can adapter on the inverter) logs_jk-bms_run.txt

[maxsarges]

I've tried it yesterday many times with different settings, boards and UART's.

But so far no success. Maybe the Board is faulty, but i don't think so.

Maybe it has something to do with GND. Both signals refer to GND of the BMS.

I have for sure connected TX / RX and GND to my ESP32. But maybe the ESP boards differ a little bit. So far this is the only guess i have, but until know i have no solution for that.

Does anybody has another idea what i can do?

Kind regards Max

[syssi]

@maxsarges Could you create a new issue an describe your setup + provide some photos of the wiring? These details are important:

1. BMS model
2. Software and hardware version of the BMS
3. Where did you buy the BMS?
4. Did you buy the model with or without CAN support?
5. How do you power your ESP?
6. Which GPIOs do you use?