ESPHome modbus Growatt ShineWiFi-S

ESPHome
43

Correct, in my case, the USB is just for power.

The green/white wires are cut and don’t connect into the USB-A connector.
Instead, they connect the RS485 converter to pin 3&4 of the COM port.

Red and black take 5v from the USB-A, over to the D1-mini and the RS485 converter.

This was the RS485 converter I used: Stable UART Serial Port to RS485 Converter Function Module RS485 to TTL Module k | eBay

And this is how its wired:

wiring
wiring1523×376 54 KB

I had previously tried the ESPHOME ‘growatt_solar’ sensor platform with this hardware.
On my 1500TL-X, it read one or two values. But most were NaN.
However, with the code here, it populates all values perfectly.

substitutions:
  device_name: growatt-mic-1500tl-x
  device_description: "Growatt Solar Inverter Monitoring"
  friendly_name: Growatt MIC 1500TL X

esphome:
  name: '${device_name}'
  comment: '${device_description}'
  
esp8266:
  board: d1_mini

# Enable logging
logger:
  baud_rate: 0
  
# Enable Home Assistant API
api:

ota:
  safe_mode: true
  reboot_timeout: 10min
  num_attempts: 5
  
web_server:
  port: 80
  auth:
    username: !secret esphome_web_username
    password: !secret esphome_web_password

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  # Optional manual IP

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: '${device_name}'
    password: !secret fallback_password
    
captive_portal:

time:
  - platform: homeassistant
    id: homeassistant_time

uart:
  id: mod_bus
  tx_pin: 1
  rx_pin: 3
  baud_rate: 9600
  #baud_rate: 115200
  
modbus:
  id: modbus1
  uart_id: mod_bus
  
modbus_controller:
  - id: growatt
# the Modbus device addr
    address: 0x1
    modbus_id: modbus1
    setup_priority: -10  

sensor:
  - platform: modbus_controller
    name: "${device_name} DcPower"
    address: 5
    register_type: "read"
    unit_of_measurement: W
    device_class: power
    icon: mdi:flash
    value_type: U_DWORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
        
  - platform: modbus_controller
    name: "${device_name} DcVoltage"
    address: 3
    register_type: "read"
    unit_of_measurement: V
    device_class: voltage
    icon: mdi:flash
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
    
  - platform: modbus_controller
    name: "${device_name} DcInputCurrent"
    address: 4
    register_type: "read"
    unit_of_measurement: A
    device_class: current
    icon: mdi:flash
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
    
  - platform: modbus_controller
    name: "${device_name} AcFrequency"
    address: 37
    register_type: "read"
    unit_of_measurement: Hz
    icon: mdi:flash
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.01
  
  - platform: modbus_controller
    name: "${device_name} AcVoltage"
    address: 38
    register_type: "read"
    unit_of_measurement: V
    device_class: voltage
    icon: mdi:flash
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
  
  - platform: modbus_controller
    name: "${device_name} AcOutputCurrent"
    address: 39
    register_type: "read"
    unit_of_measurement: A
    device_class: current
    icon: mdi:flash
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
    
  - platform: modbus_controller
    name: "${device_name} AcPower"
    address: 40
    register_type: "read"
    unit_of_measurement: W
    device_class: power
    icon: mdi:flash
    value_type: U_DWORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
    
  - platform: modbus_controller
    name: "${device_name} EnergyToday"
    address: 53
    register_type: "read"
    unit_of_measurement: kWh
    device_class: energy
    icon: mdi:flash
    value_type: U_DWORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
    
  - platform: modbus_controller
    name: "${device_name} EnergyTotal"
    address: 55
    register_type: "read"
    unit_of_measurement: kWh
    state_class: total_increasing
    device_class: energy
    icon: mdi:flash
    value_type: U_DWORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1

    
  - platform: modbus_controller
    name: "${device_name} Temperature"
    address: 3093
    register_type: "read"
    unit_of_measurement: C
    device_class: temperature
    icon: mdi:thermometer
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
    - multiply: 0.1
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