- Thu Dec 09, 2021 7:53 am
#230044
Hoi
I try to connect a matrix keypad (4*4) to an ESP32 thing.
When I run the code on a Arduino uno board I don't have any issues, but running the same code on the ESP32 I receive not only the key press but also a strange character.
I have tried several GPIO's but always the same issue.
Should I place some resistor between the ROW pins and the keypad?
Greetings Miguel
I try to connect a matrix keypad (4*4) to an ESP32 thing.
When I run the code on a Arduino uno board I don't have any issues, but running the same code on the ESP32 I receive not only the key press but also a strange character.
I have tried several GPIO's but always the same issue.
Should I place some resistor between the ROW pins and the keypad?
Greetings Miguel