Can all pins be used when using WiFi?

[OSCPUDEV]

@hajotha, I would recommend posting your code. This could be something to do with the ESP-IDF conversion for the Arduino core. It seems that most everyone here that works for Espressif has very little knowledge of the Arduino implementation, which is understandable as that is not their project. There are a lot of differences and quirks that I have seen myself.

[OSCPUDEV]

@lesept, have you confirmed that you have the proper size pull-up resistors on SCL and SDA? This is not optional. You only need one set of resistors (2.2K to 10K, with 4.7K being nominal) per I2C channel.

[marmou]

Arduino and ESP32 WROOM UE.
Hi, I have similar problem. I remaped THE TX1 pin to IO25, where I have a blue LED as communication indicator of serial1 TX.
All works good until I start the WIFI. Then the LED switch permanently ON and communication on TX1 stops. IO25 uses ADC2 group.
When I had TX1 remaped to IO14, all worked good. IO14 uses ADC2 group too.

My post SOLVED - Worst compilling profile selected: ESP32-WROOM-DA Module = Dual Antenna = IO25 used defaultly as secondary antenna.