RGB LED on PIN 48 not working?

[PBrunot]

I am unable to get the RGB LED to work on YD-ESP32-S3 N8R2 2022-V1.3 with standard Micropython and recent Micropython with NeoPixel library. Oscilloscope attached to GPIO48 shows no 800 KHz output.

Another user has the same issue, with board V1.4.

Is this a known problem ? Any workaround ?

See for more details : https://github.com/orgs/micropython/discussions/11097

[PBrunot]

I think I have a defective ESP32 because the GPIO 48 is not outputting any signal, and if I connect NeoPixel on board to GPIO 10, it works fine.

[mikadoryu]

First of all, do I solder the rgb pads that connect it to pin 48? I had the same problem that the rgb led did not work until I had to activate the led.

[PBrunot]

You are correct. I thought it was a resistor! Now the NeoPixel works fine.

[tyg6]

@mikadoryu @PBrunot I had the same problem, could you please explain more simply how to activate the led? Many thanks!

[PBrunot]

@tyg6 : you just need to add a bit of solder on the jumper below the RGB letters with your soldering pan, so that the circuit to the NeoPixel is closed. From your photo there is a gap between the two jumpers pins, so the NeoPixel will not work without this addition.

[tyg6]

@PBrunot Thanks for your quick reply! Got your point!

[tyg6]

It works! finally I found the gap should be a 0603 10kΩ resistor. It's a good design, cause you can use the GPIO 48 for other functions. But it is frustrating there is no document for this tip.

[vcc-gnd]

你购买是板子是山寨板，需要短接

At 2023-06-25 03:28:19, "Shuhu Liu" @.***> wrote:

It works! finally I found the gap should be a 0603 10kΩ resistor. It's a good design, cause you can use the GPIO 48 for other functions. But it is frustrating there is no document for this tip.

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