{
    "rtype": 0,  // 0 = modbus, 1 = http/json
    "mtype": 1,  // 0 = other, 1 = meter, 2 = inverter, 4 = battery

    // https://www.iammeter.com/newsshow/news-modbus-tcp-energy-meter

    "name": "IAMMETER Energy Meter",   // as displayed in the config dialog
    "manufacturer": "IAMMETER",
    "dev_type": "iammeter_mb",   // will be prefixed by "meter_"

    // modbus parameters
    "rtu": {
        "silence_period": 50,    // msec
        "silence_same_slave": false,
        "retries": 4,
        "rcv_timeout": 120       // msec
    },
    "modbus_read": 3,            // function code to read registers
    "modbus_read_max_registers": 96, 
    "modbus_write": 16,          // function code to write register(s)
    "modbus_write_max_registers": 64,

    // values used to build the model string
    "type_designation": {
        "address": 0,
        "type": "string",
        "fixed": "Energy Meter"
    },
    "version": {
        "address": 0,
        "type": "string",
        "fixed": "1.0"
    },
    "firmware_version": {
        "address": 0,
        "type": "string",
        "fixed": "1.0"
    },
    "serial": {
        "address": 0,
        "type": "string",
        "fixed": "1.0"
    },
    
    // instantaneous values
    "voltage_l1": {
        "address": 0,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 0.01   // result in V
    },
    "voltage_l2": {
        "address": 10,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 0.01   // result in V
    },
    "voltage_l3": {
        "address": 20,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 0.01   // result in V
    },
    "current_l1": {
        "address": 1,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 10.0   // result in mA
    },
    "current_l2": {
        "address": 11,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 10.0   // result in mA

    },
    "current_l3": {
        "address": 21,
        "type": "int16",
        "reserved": [0x7fff, 0xffff],
        "resolution": 10.0   // result in mA
    },
    "power_w": {
        "address": 32,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.0   // result in W
    },
    "power_w_l1": {
        "address": 2,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.0   // result in W
    },
    "power_w_l2": {
        "address": 12,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.0   // result in W
    },
    "power_w_l3": {
        "address": 22,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.0   // result in W
    },

    // accumulated values
    "import_wh": {
        "address": 34,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.25   // result in Wh
    },
    "export_wh": {
        "address": 36,
        "type": "int32",
        "reserved": [0x7fffffff, 0x80000000, 0xffffffff],
        "order": "hl",
        "resolution": 1.25  // result in Wh
    },

    // inputs
    "inputs": [
     ]
 }