I did some soldering with the GPIO pins on the ZeroW.
First it worked, after a second soldering session it did not work any more.
The pins required for the DAC+ Zero are?
- Any one of the 3,3 V pins, any 5 V pin, any ground pin
- GPIO 18-21, which is pins 12,35,38,40. What is the exact use of each of those pins?
- Pins 23+24 for the automatic detection Eeprom ?
The Hifiberry works fine on my non-modified Raspberry 3B with the SD-card from the zeroW.
On the Pi3 and ZeroW the Hifiberry is only detected if I add the dtoverlay entry to /boot/config.txt Didn't it work earlier without that?
On the zero playback works, but I don't hear anything.
The DAC Zero does not have any hardware volume control, so it's totally fine that alsamixer doesn't display any controls.
I electrically checked the power pins, they are connected. (at least pins 1 & 2, and Gnd 25,30,34,39)
So I got two ideas left:
- sound is muted somehow
- My soldering of the GPIO pins broke something. That's why I would like to know more details about GPIO 18-21 so I can check using the oszillograph.
thanks for any help