Serial communication between ESP32-cam and arduino

Projects General Guidance
1

Hi, I'm trying to send data between ESP32-cam and arduino Uno.
I know that ESP32-cam works on 3.3V logic, while arduino Uno works on 5V.
How can I lower the voltage of the arduino uno so that it matches with the esp32-cam (except voltage divider, because i find it not so stable)?

Thank you

2

You cannot change the voltage of the Uno itself but you can change the voltage of the Serial signals so that one board uses 3.3V and the other uses 5V

You need a two way voltage shifter like this

3

How do you experience this "instability"?

4

maybe it's my problem haha :sweat_smile: