This plugins is based on Gree HVAC MQTT bridge (https://github.com/arthurkrupa/gree-hvac-mqtt-bridge).
You need a mqtt server to read the ambient temperature. You can use an ESP8266 with DHTXX sensor and post temperature value to a topic in a mqtt server. That should be the temperature on the room where the AC is installed.
For each AC device you need to add an accesory and specify the IP address of the device (and mqtt topic to read the ambient temperature).
{
"bridge": {
"name": "Homebridge",
"username": "CC:22:3D:E3:CE:30",
"port": 51826,
"pin": "123-45-568"
},
"accessories": [
{
"accessory": "GreeAC",
"host": "192.168.1.X",
"name": "Office AC",
"updateInterval": 10000,
"mqttUrl": "mqtt://127.0.0.1",
"currentTempTopic": "home/office/temperature"
},
{
"accessory": "GreeAC",
"host": "192.168.1.Y",
"name": "Bedroom AC",
"updateInterval": 10000,
"mqttUrl": "mqtt://127.0.0.1",
"currentTempTopic": "home/bedroom/temperature"
}
]
}