{
  "$schema": "https://raw.githubusercontent.com/nobrega8/mbmap-library/main/schema/mbmap-2.schema.json",
  "mbmap": 2,
  "vendor": "Unipi Technology",
  "model": "Extension xG18",
  "models": [
    "Extension xG18"
  ],
  "vendor_website": "www.unipi.technology",
  "description": "Modbus RTU extension with 8 temperature measurement channels",
  "x_status": "official",
  "revision": 3,
  "revised": "2026-11-10",
  "source": "Extension xG18 Modbus map v1.1, Unipi technology",
  "sources": [
    {
      "title": "Extension xG18 Modbus map",
      "version": "1.1",
      "url": "https://kb.unipi.technology/_media/files:products:extensions:unipi-extension-xg18-modbus-map-v1.0.pdf",
      "note": "Holding registers, Coils and Description sheets"
    }
  ],
  "notes": [
    "The sheets inside the document are marked v1.1 although the file name says v1.0.",
    "Registers are 0-based. 32-bit values use word order CDAB (low word first). Defaults: slave address 15, 19200 bps, 8N1.",
    "Registers marked Reserved in the manual are left out."
  ],
  "protocol": "rtu",
  "unit_id": 15,
  "baudrate": 19200,
  "parity": "N",
  "databits": 8,
  "stopbits": 1,
  "byte_order": "big",
  "word_order": "little",
  "address_base": 0,
  "enums": {
    "baud_rate": {"11": "2400", "12": "4800", "13": "9600", "14": "19200", "15": "38400", "4097": "57600", "4098": "115200"},
    "parity": {"0": "Even", "1": "Odd"}
  },
  "sentinels": {"int16": {"-32768": "Sensor unconnected or faulty"}},
  "registers": [
    {"name": "MWD enable", "group": "Watchdog", "area": "holding", "address": 0, "type": "bool", "bit": 0, "access": "RW"},
    {"name": "MWD reboot detected", "group": "Watchdog", "area": "holding", "address": 0, "type": "bool", "bit": 1, "access": "RW"},
    {"name": "Temperature CH1", "group": "Temperatures", "area": "holding", "address": 1, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH2", "group": "Temperatures", "area": "holding", "address": 2, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH3", "group": "Temperatures", "area": "holding", "address": 3, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH4", "group": "Temperatures", "area": "holding", "address": 4, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH5", "group": "Temperatures", "area": "holding", "address": 5, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH6", "group": "Temperatures", "area": "holding", "address": 6, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH7", "group": "Temperatures", "area": "holding", "address": 7, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH8", "group": "Temperatures", "area": "holding", "address": 8, "type": "int16", "scale": 0.01, "unit": "°C", "access": "R", "description": "Reads -32768 when the sensor is unconnected or faulty"},
    {"name": "Temperature CH1 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 0, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH2 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 1, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH3 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 2, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH4 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 3, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH5 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 4, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH6 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 5, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH7 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 6, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Temperature CH8 valid", "group": "Temperatures", "area": "holding", "address": 9, "type": "bool", "bit": 7, "access": "RW", "description": "Validity flag of the channel reading"},
    {"name": "Firmware version", "group": "Info", "area": "holding", "address": 1000, "type": "uint16", "access": "R", "role": "firmware", "description": "Firmware version of the extension (raw number)"},
    {"name": "Number of digital outputs", "group": "Info", "area": "holding", "address": 1001, "type": "uint16", "bit": 0, "bits": 8, "access": "R"},
    {"name": "Number of digital inputs", "group": "Info", "area": "holding", "address": 1001, "type": "uint16", "bit": 8, "bits": 8, "access": "R"},
    {"name": "Number of internal RS485 lines", "group": "Info", "area": "holding", "address": 1002, "type": "uint16", "bit": 0, "bits": 4, "access": "R"},
    {"name": "Number of analog outputs", "group": "Info", "area": "holding", "address": 1002, "type": "uint16", "bit": 4, "bits": 4, "access": "R"},
    {"name": "Number of analog inputs", "group": "Info", "area": "holding", "address": 1002, "type": "uint16", "bit": 8, "bits": 8, "access": "R"},
    {"name": "Firmware ID", "group": "Info", "area": "holding", "address": 1003, "type": "uint16", "access": "R"},
    {"name": "Hardware ID", "group": "Info", "area": "holding", "address": 1004, "type": "uint16", "access": "R"},
    {"name": "PCB serial number", "group": "Info", "area": "holding", "address": 1005, "type": "uint32", "access": "R", "role": "serial"},
    {"name": "MWD timeout", "group": "Settings", "area": "holding", "address": 1008, "type": "uint16", "unit": "ms", "access": "RW", "description": "MasterWatchDog timeout; default 5000 ms"},
    {"name": "MCU VRef", "group": "Info", "area": "holding", "address": 1009, "type": "uint16", "access": "R", "description": "Reference voltage of the MCU (raw)"},
    {"name": "Measuring interval CH1", "group": "Settings", "area": "holding", "address": 1010, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH2", "group": "Settings", "area": "holding", "address": 1011, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH3", "group": "Settings", "area": "holding", "address": 1012, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH4", "group": "Settings", "area": "holding", "address": 1013, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH5", "group": "Settings", "area": "holding", "address": 1014, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH6", "group": "Settings", "area": "holding", "address": 1015, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH7", "group": "Settings", "area": "holding", "address": 1016, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "Measuring interval CH8", "group": "Settings", "area": "holding", "address": 1017, "type": "uint16", "unit": "s", "access": "RW", "description": "Default 2 s"},
    {"name": "RS485 baud rate", "group": "Settings", "area": "holding", "address": 1018, "type": "uint16", "bit": 0, "bits": 13, "access": "RW", "enum": "baud_rate", "description": "Applied after saving the configuration and restarting"},
    {"name": "RS485 parity enable", "group": "Settings", "area": "holding", "address": 1018, "type": "bool", "bit": 13, "access": "RW"},
    {"name": "RS485 parity", "group": "Settings", "area": "holding", "address": 1018, "type": "bool", "bit": 14, "access": "RW", "enum": "parity"},
    {"name": "Modbus address", "group": "Settings", "area": "holding", "address": 1019, "type": "uint16", "access": "RW", "write_min": 1, "write_max": 254, "description": "Slave address, 1-254; default 15"},
    {"name": "MWD reset indication", "group": "Commands", "area": "coil", "address": 1000, "type": "bool", "access": "RW", "description": "Clears the MWD reboot indication"},
    {"name": "Reset MCU group", "group": "Commands", "area": "coil", "address": 1002, "type": "bool", "access": "RW"},
    {"name": "Save configuration", "group": "Commands", "area": "coil", "address": 1003, "type": "bool", "access": "RW", "description": "Stores the current configuration so it is used at startup"}
  ]
}