{"NAME":"Kogan Air Purifier 3S","GPIO":[0,2272,0,2304,0,0,0,0,0,0,0,0,0,0],"FLAG":0,"BASE":54}

Flashed using serial, pull of the front panel and the Wi-Fi module is just behind the display. Ensure to disconnect the board from the rest of the air purifier to ensure the MCU doesn’t interfere with the rx/tx lines. TX, 3.3V, GND and GPIO0 are conveniently broken out onto pads for easy soldering shownn in the image below. Otherwise, a flashing jig can be used. I would recommend removing the piezo buzzer when you have it pulled apart, which is on the mcu board.

Known dpIDs

dpID	Function	Datatype	Additional Comments
1	power on/off	Boolean
2	PM2.5 reading	Integer	Tasmota v12.0.2.4+ is needed for fnID 80 PM2.5
3	Mode	Enum	0 = manual (Speed 1) , 1 = auto, 2=sleep, 3 =turbo
4	Speed	Enum	0 = Manual Speed 1, 1 = manual speed 2, 2 = manual speed 3
5	Filter life remaining	Integer
6	Ionizer	Boolean
7	Child Lock	Boolean	Enabling Child lock disables tasmota control as well as the physical buttons, so I would reccommend leaving it unmapped.
19	Timer Set	Enum	0=off, 1 =1h, 2=2h, 3=4h, 4=8h
20	Remaining Time	Integer	Remaining Time in Hex

Configuration

Backlog TuyaMCU 11,1; TuyaMCU 80,2; TuyaMCU 61,3; TuyaMCU 62,4; TuyaMCU 12,6; TuyaMCU 13,7; TuyaMCU 81,20;

Rules to publish enum values

Will publish speed and mode respectively to MQTT:

Rule1 
ON TuyaReceived#DpType4Id4 DO Publish stat/%topic%/SPEED %value% ENDON  
ON TuyaReceived#DpType4Id3 DO Publish stat/%topic%/MODE %value% ENDON

Homebridge Config

{
            "type": "airPurifier",
            "name": "Kogan Air Purifier",
            "url": "XXX.XXX.X.XXX:1883",

            "topics": {
                "getActive": "stat/airpurifier/POWER1",
                "setActive": "cmnd/airpurifier/POWER1",
                "getCurrentAirPurifierState": "stat/airpurifier/POWER1",
                "getTargetAirPurifierState": "stat/airpurifier/MODE",
                "setTargetAirPurifierState": "cmnd/airpurifie/TUYAENUM1"
            },
            "targetAirPurifierStateValues": [0,1],
            "currentAirPurifierStateValues": ["OFF","NOT_USED","ON"],
            "onValue": "ON",
            "offValue": "OFF",
            "accessory": "mqttthing"
        },
        {
            "url": "XXX.XXX.X.XXX:1883",
            "type": "airQualitySensor",
            "name": "Kogan PM2.5 Air Quality",
            "topics": {
                "getAirQuality": {
                    "topic": "tele/airpurifier/SENSOR",
                    "apply": "pm2_5 = JSON.parse(message).TuyaSNS.PM; return (pm2_5 < 13 ? 'EXCELLENT' : pm2_5 < 25 ? 'GOOD' : pm2_5 < 50 ? 'FAIR' : pm2_5 < 100 ? 'INFERIOR' : pm2_5 >=100 ? 'POOR' : 'UNKNOWN');"
                },
                "getPM2_5Density": "tele/airpurifier/SENSOR$.TuyaSNS.PM",
                "getOnline": {
                    "topic": "tele/airpurifier/LWT",
                    "apply": "return message == 'Online' ? 'ON' : 'OFF';"
                }
            },
            "accessory": "mqttthing",
        }