I have big problem and strange problem with the device,
I have connected it into Arduino
VS - 3.3V GND - GND SCL - A5 SDA - A4
didn't connect anything to ch1-3 and nothing to gnd\pow\vpu
using the simple i2cscanner code - it get stuck .
I thougth maybe something wrong in the wirring after disconnect the device - the code is running and say "No device found".
connected simple lcd i2c device - see the address correct connected old display - see the address correct
so - no prboem in the wirring \ code \arduino that is for sure 100% .
took 3 new cjmcu-322 - connect to the arduino with the correct pins, none of them works!
I have also try to add a 3.3K pullups resistors to the SDA\SCL lines - still can't see the them
what am I missing ?