HTTP interface InterGas LAN2RF gateway

1. Retrieve the Device List (Description, Response)

  Request a list of heaters (boilers) from the gateway (no authentication):

    curl -X GET http://${HOSTNAME}/heaterlist.json

  NB: for newer gateways, use basic authentication and insert /protect/ into the URL:

    curl -X GET http://${HOSTNAME}/protect/heaterlist.json --user ${USERNAME}:${PASSWORD}

  Response (JSON):
    {
        "heaterlist":
        [
            <series number 0>,
            <serial number 1>,
            <series number 2>,
            <series number 3>,
            <series number 4>,
            <series number 5>,
            <serial number 6>,
            <serial number 7>
        ]
    }


2. Collect Boiler Status (Description, Response)

  Retrieve status data per boiler.:

    curl -X GET http://${HOSTNAME}/data.json?heater=<idx>

  NB: for newer gateways, use basic authentication and insert /protect/ into the URL:

    curl -X GET http://${HOSTNAME}/protect/data.json?heater=<idx> --user ${USERNAME}:${PASSWORD}

  Response (JSON):
    {
        "nodenr":               <value>,
        "ch_temp_lsb":          <value>,
        "ch_temp_msb":          <value>,
        "tap_temp_lsb":         <value>,
        "tap_temp_msb":         <value>,
        "ch_pressure_lsb":      <value>,
        "ch_pressure_msb":      <value>,
        "room_temp_1_lsb":      <value>,
        "room_temp_1_msb":      <value>,
        "room_temp_set_1_lsb":  <value>,
        "room_temp_set_1_msb":  <value>,
        "room_temp_2_lsb":      <value>,
        "room_temp_2_msb":      <value>,
        "room_temp_set_2_lsb":  <value>,
        "room_temp_set_2_msb":  <value>,
        "displ_code":           <value>,
        "IO":                   <value>,
        "serial_year":          <value>,
        "serial_month":         <value>,
        "serial_line":          <value>,
        "serial_sn1":           <value>,
        "serial_sn2":           <value>,
        "serial_sn3":           <value>,
        "room_set_ovr_1_msb":   <value>,
        "room_set_ovr_1_lsb":   <value>,
        "room_set_ovr_2_msb":   <value>,
        "room_set_ovr_2_lsb":   <value>,
        "rf_message_rssi":      <value>,
        "rfstatus_cntr":        <value>
    }

  Label Description
    ch_temp_lsb         -- CV supply temperature lsb (lsb = least significant byte) (*1)
    ch_temp_msb         -- CV supply temperature msb (msb = most significant byte) (*1)
    tap_temp_lsb        -- Hot water temperature lsb (*1)
    tap_temp_msb        -- Hot water temperature msb (*1)
    ch_pressure_lsb     -- CV water pressure lsb (*2)
    ch_pressure_msb     -- CV water pressure msb (*2)

    room_temp_1_lsb     -- Measured temperature Room thermostat 1 lsb (*1)
    room_temp_1_msb     -- Measured temperature Room thermostat 1 msb (*1)
    room_temp_set_1_lsb -- Set temperature Room thermostat 1 lsb (*1)
    room_temp_set_1_msb -- Set temperature Room thermostat 1 msb (*1)
    room_temp_2_lsb     -- Measured temperature Room thermostat 2 lsb (*1)
    room_temp_2_msb     -- Measured temperature Room thermostat 2 msb (*1)
    room_temp_set_2_lsb -- Set temperature Room thermostat 2 lsb (*1)
    room_temp_set_2_msb -- Set temperature Room thermostat 2 msb (*1)

    serial_year         -- Serial number year
    serial_month        -- Serial number month
    serial_line         -- Serial number assembly line
    serial_sn1          -- Serial number sequence no1
    serial_sn2          -- Serial number sequence no2
    serial_sn3          -- Serial number sequence no3

    room_set_ovr_1_msb  -- Remote set temperature Room thermostat 1 lsb (*1)
    room_set_ovr_1_lsb  -- Remote set temperature Room thermostat 1 msb (*1)
    room_set_ovr_2_msb  -- Remote set temperature Room thermostat 2 lsb (*1)
    room_set_ovr_2_lsb  -- Remote set temperature Room thermostat 2 msb (*1)

    nodenr              -- RF node number
    rf_message_rssi     -- RF strength
    rfstatus_cntr       -- Internal value RF

  Label: IO
    bit 0 =  failure on / off (*3)
    bit 1 =     pump on / off
    bit 2 = tap f(x) on / off (tap function)
    bit 3 =   burner on / off
    bit 4 = -
    bit 5 = -
    bit 6 = -
    bit 7 = -

  Label: displ_code (*3)
      0 = 'opentherm'
     15 = 'boiler ext.'
     24 = 'frost'
     37 = 'central heating rf'
     51 = 'tapwater int.'
     85 = 'sensortest'
    102 = 'central heating'
    126 = 'standby'
    153 = 'postrun boiler'
    170 = 'service'
    204 = 'tapwater'
    231 = 'postrun ch'
    240 = 'boiler int.'
    255 = 'buffer'

  Notes:
    *1: temperature (°C)  = (value_lsb   + value_msb   * 256) / 100.0
    *2: CV pressure (bar) = (ch_temp_lsb + ch_temp_msb * 256) / 100
    *3: If failure on / off (IO [0]) = 1, the fault code is: <displ_code>.

    Building serial number: <serial_year> <serial_month> <mont. line> <serial_sn1> <serial_sn2> <serial_sn3>
      <mont. line> = "0123456789abcdefghijklmnopqrstuvwxyz" index = <serial_line>


3. Change Thermostat Set Point (Description)

  Set thermostat set point.

    GET <ip address>/data.json?heater=<nr>&setpoint=<setpoint>&thermostat=<thermostat>


4. Examples of Calculations:

  Calculation set point (Response, Example)
    Tg = Desired temperature in ° C
    setpoint = (Tg - 5) * 10

  Response:
    Same as with GET <ip address> /data.json

  Example:
    Set room thermostat to 20 ° C:
    boiler number: 1
    thermostat number: 1
    The gateway has the ip address: 192.168.1.145
    setpoint calculation: (20 - 5) * 10 = 150

    GET http://192.168.1.145/data.json?heater=1&setpoint=150&thermostat=1