LK 3 SW 1.28a HW 3.7 and OLED

[BlueG]

Hello,

I would like to ask you about LK3 SW 1.28 and OLED. I have Tinycontrol DHT22 AM2320 and OLED https://tinycontrol.pl/en/accessories/bo...ion-board/ .

I have a problem with OLED - it simply doesn't work. I2C frequency is 100 Hz, OLED is enabled, still nothing on the screen.

DHT22 works without any problem. I bought another LK3 with expansion board with OLED and the result is the same :-( .

I have no idea what can be problem.

[wilkxt]

There was a batch of OLED plates with a short circuit between GND and 3.3V, the service cut them, but maybe they missed something. Check on this board if there is no track that needs to be cut.

[BlueG]

Hello Tomek, thank you very much. I can confirm that both plates has the problem you mention. I tried to connect OLED to another GND and it works :-)