Hello,

a couple of years ago I bought a DFPlayer Mini, but never got around to play with it. Now, I have started to try to learn how to connect it to Arduino and then using the sample code provided here.

On a bread board, all is good and the player works as expected. I then bought 5 more and solded one on a test board. I loaded the two Arduinos with the same sample code, and I am using the same SD card in both. The ‘new’ DFPlayer Mini will not play, instead i get the serial output

Initializing DFPlayer ...

DFPlayer Mini online.

Time Out!

and then, after the playing time of the song, the red led on the DFPlayer goes out and the message:

Number:6 Play Finished!

I have played around with setting the SetTimeOut to everything from 500 to 5000, and with no success.

How do I troubleshoot this error?

Thanks