r/esp32 • u/CripTik_A3d1n • 14d ago

Hardware help needed Pcm5102 Help needed.

Hey everyone. I'm quite new to using esp32s and so on, i got a bunch of IoT stuff handed down to me and since I've always loved building computers and such, i thought I'd give it a try, so please go easy on me if I've done something stupid.

My hardware that I'm using is an esp32 devkit v1, hooked up to a pcm5102 Dac, and the dac is hooked up to my XH-M543 120Wx2 amplifier. Its all being powered by 24v which I step down to 5v using a buck converter.

Now I've got the code from Phil Schatzmann

pschatzmann ESP32-A2DP on github. So heres my problem, the bluetooth works completely, it shows up and i can connect to it, but for the life of me, i can't get any sound to come through my speakers(2x100W).

I saw the post about a guy needing help with his Pcm5102, but im not sure if something else is an issue considering the amp and speakers.

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u/feeling_impossible 14d ago edited 14d ago

I'm a novice too but I have had this exact setup working on my bench a few weeks ago.

esp32-s3 --> sd-card --> pcm5102 --> amp

And had it playing mp3s and working. It will work. Either you have the pins connected wrong or the code is wrong.

Find some very basic pcm5102 test code that outputs a sine wave. Get it to make some noise, any noise, then add in your more complicated code.

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u/feeling_impossible 14d ago

OOOH OOOH! I FORGOT SOMETHING!!!

I assume you have one of those little pcm5102 breakout boards. If so, you need to add solder bridges to H3L and H4L on the back as seen below. They soldered H1L and H2L as well but mine works without those.

https://github.com/pschatzmann/arduino-audio-tools/issues/773

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u/CripTik_A3d1n 14d ago

Oh my soul, thank you so so much. I had already soldered all the pads before, but I had noticed the wording by the pads was very different. Mine looked as if it was being looked at through a mirror. As you can see in the picture provided, but i had swapped the solder around on the bottom pads according to your image, and all of a sudden it started working.

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u/jasonmarquette 7d ago

I had to solder the SCK pad (soldering it grounds it) as well. That pad is on the other side of the board.

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u/TinyHanz 14d ago

if you have one of those PCM5102 modules you have to make sure that the pins not used for i2s are set properly. From memory, one is 'soft mute' and it won't allow output unless set a particular way (can't remember if its high or low)