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doctor64 / tuyaZigbee

Replacement firmwares for TuYa zigbee devices
Apache License 2.0
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TH02Z Temperature humidity sensor #37

Open auron-muc opened 2 months ago

auron-muc commented 2 months ago

I saw the TH02Z Temperature humidity sensor is already in the WIP list, and there is also tempSensor-notes.txt with all the info regarding the module.

I've got a few of them, and would like to replace the firmware because the stock FW is very inconveniant to set up and kind of unreliable with HomeAssistant.

Is there anything I could do to help here? I've done some ebedded coding, but no zigbee yet. I would need some pointers where/how to best start.

I already got the programmer and extracted the stock FW from several devices. They use the ZTU board and a PCB with the marking "RH-MAGv3B". No need to solder for me, all pins needed for programming are very conveniently on the ISP header: Tuya_temp_hum_sensor_TH02Z_programmer_pinout Different from your instructions I needed to connect reset though, the python tool would not work without.

D4 on TB-03F-KIT goes to SWS on the TH02Z D3 on TB-03F-KIT goes to RESET on the TH02Z GND and +3v3 are self-explaining.

auron-muc commented 2 months ago

button goes to pin_3/C0 on the ZTU (pullup restistor R6) LED goes pin_11/B4 on the ZTU -> RS0 -> LED -> GND CHT8305 : SDA -> pin_8/C2 on ZTU (pullup R4) SCL -> pin_9/C3 on ZTU (pullup R3) Alert -> pin_2/D7 on ZTU (pullup R5)

I took an image of the back and front, light intentionally from the side to better see the traces. Front is a bit blurry due tu this "bad" light, but still visible OK. Tuya_temp_hum_sensor_TH02Z_back_and_front

baetzst commented 2 months ago

There is already a custom firmware from pvvx. https://pvvx.github.io/TS0201_TZ3000/ https://github.com/pvvx/ZigbeeTLc/blob/master/bin/1141-d3a3-01993001-TH02Zz_v0123.zigbee