Staying awake while playing a WAV file

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nabs said:
Hi, I’ve tried adding that line, there is still no audio comes out.
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you should verify each of your WAV files is in proper format (see post #17). Try running the IDE examples > audio > WavFilePlayer with Teensy WAV files (SDTEST1.WAV ...), then use your WAV files in loop()

Each teensy has a unique MAC address, see
https://forum.pjrc.com/threads/5759...ess-Teensy-4-0?p=221833&viewfull=1#post221833

you could use the mac address to distinguish each of your T3.2 devices instead of B0 and B1. Your sketch should only use Wire.begin(myID); -- delete the other Wire.begin() statements.

Confirm: you have 4 T3.2, each with their own audio shield and SD card, and each SDA/SCL pin connected to the nodemcu SCL and SDA pins, and all share a common GND. The SDA and SCL lines should have pullup resistors (2.2K?) to 3.3v.
 
I confirm that I’m able to run the IDE examples using my WAV files

I deleted the rest of wire.begin() statements

And yes confirm all 4 T3.2 have own audio shield and sd card, and is connected to SDA/SCL to nodemcu and shared all common GND.

But I never use any resistors. Do I need a resistor?
 
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