Hello, after receiving the hardware, I followed all the instructions. The Myndberry is online and I have access to the web interface. However, I have no sound output.
It seems as if no hardware is present. Under /dev, there are only tty* entries.
Even during installation, I get status errors, see image.
Just a guess - did you update the Mynd firmware as described here?
I have done this several times.
I am not an expert. My speaker conversion to a MyndBerry according to the documentation (and the helpful video), however, went smoothly.
Hard to say for me if your problem is hardware- or software-related.
And I see a lot more devices in my /dev than only tty*.
The AI proposed to verify that Moode’s audio output device is set to “Generic-I2S”.
Otherwise, running “moodeutl -s” might give helpful information.
I’ve now reversed the modification. After loading the original firmware, the Mynd is working just like it did out of the box.
What puzzles me a bit is point 5 in the firmware download instructions; there’s nothing there to unzip. Is it normal for the Myndberry firmware to be slightly smaller than the original firmware? Does anyone have any ideas? Since the Mynd is working again now, the adapter board or the Raspberry Pi must be faulty. Does anyone happen to have a spare adapter board?
I also used the .bin file - there was no need to unzip it.
The hardware does not use a lot of connections. Power supply to your Raspberry Pi seems to be OK and I tend to say that the UART is also fine because the link daemon reported the battery level.
Then there are only three connections left for the audio.
The I2S Data needs the 0R resistor R5 to be populated. It connects the I2S_DOUT from RPi side with I2S_MYND_IN on the Mynd connector. Maybe there is a chance that the resistor is just missing?
Can you measure these connections, also testing short-circuits to neighbour pins and to GND?
| Signal | Mynd | RPi |
|---|---|---|
| I2S_WCLK | 8 | 35 |
| I2S_BCLK | 6 | 12 |
| I2S_Data | 4 | 40 |
| UART0_RX | 12 | 10 |
| UART0_TX | 10 | 8 |
Hello, thanks a lot for the tips. I checked the connections, and everything is fine. Resistor R5 is okay. The Mynd requested a firmware update after I reverted the changes. I performed the modification again, and suddenly everything worked. Now I just need to familiarize myself with operating the Moode player. Thanks again.
