Info

[grydo]

Hi, I wanted to understand how to use esp32, how do I connect it to the charge controller?

[lucasimons]

Hi, you have to use a rs485 converter... This is mine

[grydo]

This?

[lucasimons]

This?

Yes I use the orange and orange white cable of rj45

[grydo]

pin 1 and pin 2 rj45?

[lucasimons]

Yes t 568B ... The first pin is orange-white and the second is orange, this two pin must be connected to rs485 converter

[grydo]

Thanks, I had it sorted, it happens to me that the next day it displays the incorrect values, restarting the converter everything works correctly.

[grydo]

It happens every day after the night, all the parameters are wrong.

[lucasimons]

It happens every day after the night, all the parameters are wrong.

Can you share your setup? Hardware and software (esphome file.yaml)

[grydo]

My device is atom m5 stack my Yaml

substitutions: device_name: mppt4880 device_description: "Monitor and control a MPPT-4880 via RS485 and send data to Home-Assistant via BT using Atom-M5" friendly_name: "4880-MPPT" name: mppt4880 device_id: mppt4880

esphome: name: ${device_name} platform: ESP32 board: m5stack-atom platformio_options: upload_speed: 115200

Enable logging

logger:

wifi: networks:

• ssid: !secret wifi_ssid password: !secret wifi_password

• ssid: !secret wifi_ssid_2 password: !secret wifi_password_2

  manual_ip: static_ip: 192.168.10.241 gateway: 192.168.10.1 subnet: 255.255.255.0 dns1: 192.168.10.1 dns2: 8.8.8.8

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

  ap: ssid: "atom-3 Fallback Hotspot" password: "123456789"

web_server: port: 80

If you don't use Home Assistant please remove this api section and uncomment the mqtt component!

api:

mqtt:

broker: 192.168.2.32

client_id: ${device_id}

discovery_retain: false

discovery_object_id_generator: device_name

captive_portal:

light:

• platform: fastled_clockless chipset: WS2812B pin: 27 num_leds: 1 rgb_order: GRB id: status_led name: ${friendly_name} Light effects:
  • random:
  • flicker:
  • addressable_rainbow:

binary_sensor:

• platform: gpio pin: number: 39 inverted: true name: ${friendly_name} Button on_press: then:
  • light.toggle: status_led

button:

• platform: restart id: ${device_id}_restart_button name: "${friendly_name} Restart"

uart: rx_pin: GPIO22 tx_pin: GPIO19 id: mod_bus baud_rate: 9600 stop_bits: 1

modbus:

flow_control_pin: 23

uart_id: mod_bus id: mod_bus_mppt

modbus_controller:

• id: mppt

  the Modbus device addr

  address: 0x1 modbus_id: mod_bus_mppt command_throttle: 200ms setup_priority: -10 update_interval: 5s

sensor:

- platform: modbus_controller

modbus_controller_id: mppt

name: Rated Current

address: 10009

register_type: holding

value_type: U_WORD

register_count: 1

filters:

- multiply: 0.1

• platform: modbus_controller modbus_controller_id: mppt

  name: Charger Workstate address: 15201 register_type: holding value_type: U_WORD register_count: 1

• platform: modbus_controller modbus_controller_id: mppt

  name: MPPT state address: 15202 register_type: holding value_type: U_WORD register_count: 1

• platform: modbus_controller modbus_controller_id: mppt

  name: Charging state address: 15203 register_type: holding value_type: U_WORD register_count: 1

• platform: modbus_controller modbus_controller_id: mppt id: pv_input_voltage name: pv_input_voltage address: 15205 unit_of_measurement: "V" ## for any other unit the value is returned in minutes register_type: holding value_type: U_WORD register_count: 1

  accuracy_decimals: 1 icon: mdi:sine-wave filters:

  • multiply: 0.1

• platform: modbus_controller modbus_controller_id: mppt id: batt_input_voltage name: batt_input_voltage address: 15206 unit_of_measurement: "V" ## for any other unit the value is returned in minutes register_type: holding value_type: U_WORD register_count: 1

  accuracy_decimals: 1 icon: mdi:sine-wave filters:

  • multiply: 0.1

• platform: modbus_controller modbus_controller_id: mppt id: batt_input_current name: batt_input_current address: 15207 unit_of_measurement: "A" register_type: holding value_type: U_WORD register_count: 1 filters:

  • multiply: 0.1 accuracy_decimals: 1

• platform: modbus_controller modbus_controller_id: mppt id: pv_input_power name: pv_input_power address: 15208 unit_of_measurement: "W" ## for any other unit the value is returned in minutes register_type: holding value_type: U_WORD register_count: 1

  accuracy_decimals: 1 icon: mdi:sine-wave

• platform: modbus_controller modbus_controller_id: mppt

  name: MPPT temperature address: 15209 unit_of_measurement: "°C" ## for any other unit the value is returned in minutes register_type: holding value_type: U_WORD register_count: 1

  - platform: modbus_controller

  modbus_controller_id: mppt

  name: MPPT energy day

  address: 15219

  unit_of_measurement: "kWh"

  register_type: holding

  value_type: U_WORD

  register_count: 1

number:

• platform: modbus_controller

  name: MPPT Float Volatge address: 10103 value_type: U_WORD register_type: holding unit_of_measurement: "V" icon: mdi:timer-sand min_value: 25 max_value: 56 step: 1 lambda: "return x * 0.1; "

• platform: modbus_controller

  name: MPPT Absorption Volatge address: 10104 value_type: U_WORD register_type: holding unit_of_measurement: "V" icon: mdi:timer-sand min_value: 25 max_value: 56 step: 1 lambda: "return x * 0.1; "

• platform: modbus_controller

  id: mppt_max_current name: MPPT Corrente Max address: 10108 value_type: U_WORD register_type: holding unit_of_measurement: "A" icon: mdi:timer-sand min_value: 1 max_value: 80 step: 1 lambda: "return x 0.1; " write_lambda: |- ESP_LOGD("main","Modbus Number incoming value = %f",x); uint16_t b_capacity = x10 ; payload.push_back(b_capacity); return x ;

[grydo]

new?

[lucasimons]

Sorry but i haven t any issue the parameter are all correct, have you some soldered wire? or connector not tightened?