Samsung ASHP Modbus

esphome.yaml

esphome:
  name: "esp-ashp"
  on_boot:
    priority: -100
    then:
      - lambda: |-
          esphome::modbus_controller::ModbusController *controller = id(ashp_modbus);
          std::vector<uint16_t> outdoor_registers = {
              0x8238, // Compressor frequency
              0x8204, // Outdoor temperature
          };
          esphome::modbus_controller::ModbusCommandItem register_hidden_outdoor_functions =
              esphome::modbus_controller::ModbusCommandItem::create_write_multiple_command(controller, 6000, outdoor_registers.size() ,
                                                                                          outdoor_registers);

          std::vector<uint16_t> indoor_registers = {
              0x4087, // Immersion
              0x406C, // Backup heater
              0x42E9, // Water flow
              0x42F1, // Compressor ratio
              0x4067, // Three-way valve position
          };
          esphome::modbus_controller::ModbusCommandItem register_hidden_indoor_functions =
              esphome::modbus_controller::ModbusCommandItem::create_write_multiple_command(controller, 7003, indoor_registers.size() ,
                                                                                          indoor_registers);

          controller->queue_command(register_hidden_outdoor_functions);
          delay(200);
          controller->queue_command(register_hidden_indoor_functions);
          ESP_LOGI("ModbusLambda", "Set hidden Modbus functions");

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

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

captive_portal:

uart:
  id: mod_bus
  tx_pin: 17
  rx_pin: 16
  baud_rate: 9600
  data_bits: 8
  stop_bits: 1
  parity: EVEN

modbus:
  id: ashp
  send_wait_time: 200ms
  
modbus_controller:
  - id: ashp_modbus
    address: 0x1
    modbus_id: ashp
    setup_priority: -10
    update_interval: 5s

sensor:
  # == DHW ==
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "DHW Status"
    id: dhw_status
    register_type: holding
    address: 72
    value_type: U_WORD

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "DHW Mode"
    id: dhw_mode
    register_type: holding
    address: 73
    value_type: U_WORD

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "DHW Target Temperature"
    id: dhw_target_temperature
    register_type: holding
    address: 74
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "DHW Temperature"
    id: dhw_temperature
    register_type: holding
    address: 75
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  # == Flow ==
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Return Temperature"
    id: return_temperature
    register_type: holding
    address: 65
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Flow Temperature"
    id: flow_temperature
    register_type: holding
    address: 66
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Target Flow Temperature"
    id: target_flow_temperature
    register_type: holding
    address: 68
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  # == Hidden ==
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Compressor Frequency"
    id: compressor_frequency
    register_type: holding
    address: 4
    unit_of_measurement: "Hz"
    icon: "mdi:sine-wave"
    value_type: U_WORD

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Outdoor Temperature"
    id: outdoor_temperature
    register_type: holding
    address: 5
    unit_of_measurement: "ºC"
    device_class: "temperature"
    value_type: S_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Flow Rate"
    id: flow_rate
    register_type: holding
    address: 87
    unit_of_measurement: "lpm"
    icon: "mdi:pipe"
    value_type: U_WORD
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Threeway Valve Position"
    id: threeway_vale
    register_type: holding
    icon: "mdi:valve"
    address: 89
    value_type: U_WORD

  # == Debug ==
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Communication Status"
    id: comm_status
    register_type: holding
    address: 50
    value_type: U_WORD
  
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Error Code"
    id: error_code
    register_type: holding
    address: 63
    value_type: U_WORD

binary_sensor:
  # == Status ==
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "CH Status"
    id: ch_status
    register_type: holding
    address: 52
  
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Away Status"
    id: away_status
    register_type: holding
    address: 79

  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Defrost Status"
    id: defrost_status
    register_type: holding
    address: 2
    filters:
      - lambda: |-
          if ((id(defrost_status).state == 255) or (id(defrost_status).state == 0)) {
            return false;
          } else {
            return true;
          }
    
  - platform: modbus_controller
    modbus_controller_id: ashp_modbus
    name: "Quiet Status"
    id: quiet_status
    register_type: holding
    address: 78