ESP32 Forum

Designed a custom board around the DevKit schematic and "most things work"...

What I cannot get working is PWM on GPIO's 8-10 (pin 12-14). Connected to a LED it flickers all the time. Tried to understand if those pins are used internally somehow...

Using the ESP32-S3-MINI-1-N8.

I have verified on a naked board that the PCBs are routed and connected to the expected connector pins. Checked my images from when I put the solder paste on. PWM on the "internal LED" pin GPIO26 works as expected. For headers, I have broken out GPIO1-2 and GPIO4-10 and I can't control any one of them..... Did a blink sketch using all those pins incl. GPIO26. Only GPIO26 is going from low to high every other second.

PCB:
Solder Paste: Any type of input here? First use of the S3 so I have tried to find any info on these GPIO pins ....

Hello
I'm not a very big specialist
but check VDD3P3_RTC power supply
https://www.espressif.com/sites/default ... eet_en.pdf
section 2.5.1

@ok-home I'm actually using the https://cdn-shop.adafruit.com/product-f ... eet_en.pdf
mini-1 and it only has a single VDD pin that probably supplies the one you just referred to.

This is so strange. I'll try and configure most pins as outputs and toggle all of them high-to-low-to-high to see if Ive messed up pin mappings totally.