Actually I already read this page several times and I still habe no idea where the problem is.
But i could enclose the problem on the pin 2, Pin 15 is working.
When I use GPIO 2 as Output, it works, but some keys shows the value of other keys, but when I use it as Input, nearly nothing works any ...
Search found 2 matches
- Wed Dec 30, 2020 6:57 pm
- Forum: Hardware
- Topic: Using 4x4 Keypad GPIO 15 and 2
- Replies: 3
- Views: 6080
- Wed Dec 30, 2020 11:29 am
- Forum: Hardware
- Topic: Using 4x4 Keypad GPIO 15 and 2
- Replies: 3
- Views: 6080
Using 4x4 Keypad GPIO 15 and 2
Hey all,
I am trying to use a 4x4 Matrix Keypad on my NodeMCU esp32 board following this tutorial:
diyi0t.com
I want to use the pins 15, 2, 4, 16, 17, 5, 18, 19 but I get weird results (three buttons hand back the value of other buttons).
When I use the Pins 4, 16, 17, 5, 18, 19, 21, 3 (or other ...
I am trying to use a 4x4 Matrix Keypad on my NodeMCU esp32 board following this tutorial:
diyi0t.com
I want to use the pins 15, 2, 4, 16, 17, 5, 18, 19 but I get weird results (three buttons hand back the value of other buttons).
When I use the Pins 4, 16, 17, 5, 18, 19, 21, 3 (or other ...