Bridge for 2018+ R32 LG Air/Water-Heat pumps. See https://www.lg.com/de/business/monobloc for more information on the unit.
Based on the results from https://github.com/hww3/LG_Aircon_MQTT_interface
Same as https://github.com/hww3/LG_Aircon_MQTT_interface
- Simulate PENKTH000 to leverage power usage control
- Complete documentation / usage
| Abbrev | Meaning |
|---|---|
| AWHP | Air/Water heat pump |
| ODU | Outdoor unit |
| IDU | Indor unit (monobloc includes this in the ODU), not to be confused with the REMO |
| REMO | Remote for control |
- Single-wire half-duplex 300 Baud serial bus on the "Signal" line between ODU and REMO
- Packets are 20 Bytes in size
- Each (non-changing) packet is transmitted twice
- Each packet has a checksum in the last byte
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| x0 | 22 | 02 | 08 | 00 | 19 | 00 | 00 | 14 | 2D | 00 | 17 | 11 | 26 | C0 | 00 | 06 | 40 | 00 | 2F |
| SRC | MODE1 | MODE2 | MODE3 | MODE4 | UNK | UNK | UNK | Water_target | DHW_target | UNK | Water_In | Water_Out | DHW | UNK | UNK | UNK | UNK | UNK | ChSum |
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C6 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 0B | B8 | 00 | 00 | 00 | 00 | D0 | 07 | 00 | 35 |
| SRC | UNK | UNK | UNK | UNK | UNK | UNK | UNK | UNK | UNK | Unit limit | Unit limit | UNK | UNK | UNK | UNK | 30010 | 30010 | UNK | ChSum |
| 00 | 01 |
|---|---|
| x5 | |
| x6 | 01 |
| x6 | 02 |
| x6 | 03 |
- Connection without GND with Modbus wires A and B
- Serial parameters: 9600 baud, 8 bits of data, No parity, 2 Stopp bits (9600 8N2)
- Protocol is standard Modbus RTU
- https://npulse.net/en/online-modbus
- https://www.modbustools.com/modbus_slave.html
- https://www.mikrocontroller.net/topic/500056
- https://www.scadacore.com/tools/programming-calculators/online-hex-converter/
| Register | Type / length | Content | Unit |
|---|---|---|---|
| 30010 | uint8 / 1 | energy consumption | W |
| 40000 | uint32 / 2 | impulses per kWh, Connection 1 | imp/kWh |
| 40002 | uint32 / 2 | impulses per kWh, Connection 2 | imp/kWh |
| 40004 | uint32 / 2 | impulses per kWh, Connection 3 | imp/kWh |
| 40006 | uint32 / 2 | impulses per kWh, Connection 4 | imp/kWh |