ESP32/ESPHome help

[Dimu1234]

I have added my inverter to Home Assistant through ESP32 & ESPHome.

There's register E204 which is a R/W one.

I want to write values to it from a Home assistant switch.

Following code I use.

esphome:
  name: srne
  friendly_name: SRNE

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "+EMWnue33wLGXOUUcZdBgtEcWOJjQIPoN7E3WbVj2UA="

ota:
  password: "27a70d64573b33d2dc248577739abfa5"


wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  use_address: 192.168.1.16
  manual_ip:
    # Set this to the IP of the ESP
    static_ip: 192.168.1.16
    # Set this to the IP address of the router. Often ends with .1
    gateway: 192.168.1.1
    # The subnet of the network. 255.255.255.0 works for most home networks.
    subnet: 255.255.255.0

uart:
 id: mod_bus
 tx_pin: 19
 rx_pin: 18
 baud_rate: 9600
 stop_bits: 1
 
modbus:
 id: tdt1_modbus
 flow_control_pin: 4
 
modbus_controller:
 - id: srne1
   address: 0x01
   modbus_id: tdt1_modbus
   setup_priority: -10
   update_interval: 15000ms #data refresh rate

switch:
  - platform: template
    name: "Output Priority Switch"
    id: output_priority_switch
    turn_on_action:
      - modbus.write_register:
          id: tdt1_modbus
          address: 0xE204
          value: 1
    turn_off_action:
      - modbus.write_register:
          id: tdt1_modbus
          address: 0xE204
          value: 0

sensor:
 - platform: modbus_controller
   modbus_controller_id: srne1
   name: "Output Priority" #name for HA
   id: srne_output_priority #id for HA
   register_type: holding
   address: 0xE204

This works fine without that switch part. When I add this part, it gives me an error as below

**on_turn_on: 
    then: 
      - 
        Unable to find action with the name 'modbus.write'.**

How to correct this?

I'm new to coding.

[seanco1]

On my setup I have the below in place of your switch section. Seems to work. Keep your sensor section to confirm the change was made to your inverter.

select:
  - platform: modbus_controller
    name: "Supply priority"
    address: 0xE204
    value_type: U_WORD
    optionsmap:
      "AC 1ST": 0
      "Battery 1ST": 1
      "Solar 1ST": 2

[ssieb]

Where did you find anything about a modbus.write command? That doesn't exist.