WLED won't start with logic shifter plugged in

Issues
1

When I turn on the power supply the ESP32 lights up but the LEDs won’t turn on and I can’t access wled (says its offline). But if I unplug my 3.3v-5v shifter from the 3.3v pin on my ESP and plug it right back in the ESP instantly comes online and everything lights up and works fine.
I have two ESPs both wired the same way and both have the same issue.

Additional info:
I’m using all four ports on the KeeYees 4 Channels IIC I2C Logic Level Converter
The ESP32s are Devkitv1

2

I would choose a different shifter. “I2C shifters are generally too slow for WLED, so don’t use them.”
https://kno.wled.ge/basics/compatible-hardware/#levelshifters

3

Thanks, I’ll look into getting a different chip.

But I still can’t figure out why the whole system works when I unplug the chip and then plug it back in. It seems like speed is fine when everything is in place.

4

Likely the shifter connection is pulling your GPIO pin Hi (or Lo) which is preventing proper power up.
Try and connect with a different GPIO.

1 Like
5

Thank you Divsys!
It was pin 12. It was pulling high like you said.