I/O Problem ESP32-Dev Kitc V4

[SpeedPIC32]

Hello Team Matrix

here I am again.
I wanted to flash all possible IN/OUT ports for 1 sec.
GPIO:0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,21,22,23,25,26,27,32,33
all on all off etc.
The simulation works.
3 guesses what doesn't work?
Any ideas?
None of them flashes every second.
6 - 11 fidget somehow
partly on partly off
partly undefined.

If I deactivate 6-11, the rest flashes correctly.

The board comes from AZ-Delivery.

Greeting SpeedPic32

testesp32.fcfx

(17.69 KiB) Downloaded 79 times

[LeighM]

Please read ESP32 documentation ...
https://docs.espressif.com/projects/esp ... /gpio.html

SPI0/1: GPIO6-11 and GPIO16-17 are usually connected to the SPI flash and PSRAM integrated on the module and therefore should not be used for other purposes.

[SpeedPIC32]

Hello LeighM good tip

[unity-control]

Just beware some ports have got pullup/pulldown resistors and as Leigh mentioned are special ones, so avoid using those.

An excellent reference I found whilst having similar issues here, have a check and take note of each and every I/O pin:
https://randomnerdtutorials.com/esp32-p ... nce-gpios/

HTH