Modbus heatpump issue configuration Esphome

Configuration
1

I have a heat pump boiler with modbus protocol but I can’t communicate with it, I attach my configuration: esphome side:
`esphome:

  name: esphome-web-f96b62
  friendly_name: ESPHome Web f96b62

esp8266:
  board: esp01_1m

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "XXXXXXXXXXXXXXAlvDLbWdJr3BxhnxchQCfMSQEDrBXPAZBnqs="

ota:


wifi:
  ssid: "XXXXXXXXXXXX"
  password: "XXXXXXXXXXXXXX"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "XXXXXXXXXXXX"
    password: "XXXXXXXXXXXX"

captive_portal:

uart:
  id: mod_bus
  tx_pin: GPIO1
  rx_pin: GPIO3
  baud_rate: 9600
  stop_bits: 1
  #baud_rate: 115200
  
modbus:
  id: modbus1
  uart_id: mod_bus
  #send_wait_time: 200ms
  
modbus_controller:
  id: vlb
# the Modbus device addr
  address: 0x01
  modbus_id: modbus1
  update_interval: 5s
  #setup_priority: -10  

sensor:
  - platform: modbus_controller
    modbus_controller_id: vlb
    name: "maxa"
    id: maxa
    register_type: holding
    address: 2001
    value_type: U_WORD`

configuration.yaml:

modbus:
  - name: modbus1
    type: tcp
    host: 192.168.1.6
    port: 502

these are the moddbus addresses of the machine

image
image1576×2229 279 KB

error no response…

2

I know it’s been a while since you posted, but I managed to connect using an ESP32 with an RS485 module and set up the following configuration in case someone else needs it.

uart:
  tx_pin: GPIO1
  rx_pin: GPIO3
  baud_rate: 9600
  parity: EVEN
  stop_bits: 1
  data_bits: 8

modbus:
  id: modbus1
  

modbus_controller:
  - id: heat_pump_modbus
    address: 0x01  ## address of the ModBUS slave device on the bus
    modbus_id: modbus1
    setup_priority: -10
    update_interval: 10s
    command_throttle: 2ms
1 Like
3

thanks for the reply, I only saw it now, I’ll try over the weekend, I wanted to ask you again, I have to replace this part of the code you sent with my parameters, in the sense: I have to leave (sensor:) etc. ?

4

yes, the sensors and other entities remain the same. The code above is only for connecting to the modbus controller.

1 Like
5

Here is an example for reading Alarms:

sensors:
### ALARMS
  - platform: modbus_controller
    modbus_controller_id: heat_pump_modbus
    name: "HP Status"
    address: 0x00C8
    value_type: U_WORD
    register_type: holding
    id: alarm1_raw
    on_value:
      then:
        - lambda: |-
            std::string state;
            switch ((int)id(alarm1_raw).state) {  // Cast to integer
              case 0:
                state = "High pressure - E001";
                break;
              case 1:
                state = "Low pressure - E002";
                break;
              case 2:
                state = "Compressor thermal protection - E003";
                break;
              case 3:
                state = "Fan theral protection - E004";
                break;
              case 4:
                state = "Frost - E005";
                break;
              case 5:
                state = "Lack of flow - E006";
                break;
              case 6:
                state = "ACC prepare low temperature - E007";
                break;
              case 7:
                state = "Lack of librication - E008";
                break;
              case 8:
                state = "High discharge temeperature of Cp 1 - E009";
                break;
              case 9:
                state = "Solar collector at high temperature - E010";
                break;
              case 12:
                state = "Compressor 2 thermal protection - E013";
                break;
              case 13:
                state = "Fan 2 thermal protection - E014";
                break;
              case 15:
                state = "Pump thermal protection - E016";
                break;
              default:
                state = "Unknown";
            }
            id(alarm1).publish_state(state);
1 Like
6

Hi @gojonny i’m about to install an i-32V5 heat pump soon, can i ask you where did you find the modbus reference? are you able to share it? if you have the HA implementation working and want to share that too it would be amazing

7

I didn’t succeed, I thought I had found something on the net but it wasn’t what I needed, someone very kind tried to help me but nothing, so I abandoned the project I even spent a lot of money buying a hs-2211 converter module but nothing I didn’t succeed, I hope that someone can in the future because I need to remotely control my heat pump.

8

Thank you, if i eventually do something I’ll post an update