Seplosbms CRC check error

[miguel300477]

hi,

I have been trying to get data but i keep getting this error:

[W][seplos_modbus:101]: SeplosBms CRC Check failed! DD5D != DCFD

from time to time i get the bms data ok, but most of the time is that error. I played with the rx timeout and i get data, but alot of that error. logs_seplosbms_logs (2).txt

I have a seplos BMS from millenials , 150A 16cells. this is my config:

`substitutions: name: seplos-bms external_components_source: github://syssi/esphome-seplos-bms@main tx_pin: GPIO4 rx_pin: GPIO5

esphome: name: ${name}

esp8266: board: esp01_1m

external_components:

• source: ${external_components_source} refresh: 0s

Enable logging

logger:

Enable Home Assistant API

api: encryption: key: "LElVpf+yOX/T7gPTYWuijvEsBFLPyGlGuRXZkKLq5js="

ota: password: "fbce9898f7a22f8bbc01ce2114efe287"

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

Enable fallback hotspot (captive portal) in case wifi connection fails

ap: ssid: "Seplosbms Fallback Hotspot" password: "OiVjReZiaGkq"

captive_portal:

uart: id: uart0 baud_rate: 19200 tx_pin: ${tx_pin} rx_pin: ${rx_pin} debug: direction: BOTH dummy_receiver: true after: delimiter: "\r" sequence:

• lambda: UARTDebug::log_string(direction, bytes);

seplos_modbus: id: modbus0 uart_id: uart0 rx_timeout: 1100ms

seplos_bms: id: bms0 seplos_modbus_id: modbus0 update_interval: 10s

sensor:

• platform: seplos_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" temperature_1: name: "${name} temperature 1" temperature_2: name: "${name} temperature 2" temperature_3: name: "${name} temperature 3" temperature_4: name: "${name} temperature 4" temperature_5: name: "${name} environment temperature" temperature_6: name: "${name} mosfet temperature" total_voltage: name: "${name} total voltage" current: name: "${name} current" power: name: "${name} power" charging_power: name: "${name} charging power" discharging_power: name: "${name} discharging power" residual_capacity: name: "${name} residual capacity" battery_capacity: name: "${name} battery capacity" rated_capacity: name: "${name} rated capacity" state_of_charge: name: "${name} state of charge" charging_cycles: name: "${name} charging cycles" state_of_health: name: "${name} state of health" port_voltage: name: "${name} port voltage"` can you help me?

[miguel300477]

Hi, i have sorted it out.

I was missing the RX buffer.

[syssi]

Good job! I will add a note to the example.

[miguel300477]

Yes,

I added this from multiple battery config.

rx_buffer_size: 384

I have single battery but without that it would not work. I got some data but mostly CRC check error. With rx buffer size works perfect with default rx timeout.

I m using 2 second for every request and it work great.

Hardware: Seplos 150A 16S Can Version ESP8266 TTL to RS485 as you mentioned.

Geat job.