Hey, thank you very much guys for your greetings. I am really pleased that my little piece of source code did something useful. I have been out of this forum but I am back. First of all, when you have a problem with this sound module, 90% of the times, blame the uSD card. IT is VERY pesky about them. Later, could be the wired, and If everything else did not work, just replace the module.
About the gap, It depends entirely on the software and the module. It seems that needs 20 [ms] to switch between tracks. That's the gap you heard. I have been trying to fix that, but seems impossible given the hardware. I also moved the pin from 3.3 to 5 in one of my modules ( I have 2 of them) and did not work. Put 2 diodes, as recommended and worked, but no so fine. Any other moved the pin and got fine results?
Hey guys, anyone using it at 5V? Cause I moved the soldered pin from 3.3 to 5 and could not get it to work. Quite erratically. I did not use any diode cause I believe they are soldered in the pcb board. Any idea?
I bought one of these modules on eBay and following some instructions from someone on YouTube, I resoldered the jump link to set the voltage to 5V instead of 3.3V (there are 3 solder pads and you join 2 of them).
I did this because I could not get the module to make any sounds, even though the (busy) LED was flashing as if it was receiving commands etc.
Anyway. Following switching the module to 5V, it still didn't work, but when I tried to re-load the AD4 files, the SD card was no longer readable.
So it looks like the module may work on 5V, but not all SD cards (well not mine).
Hence I'd not advise anyone to try this unless the know their SD card is 5V tolerant.
Well, I don't think any micro sd card works at 5V. So, basically If does not work, It is not weird. If you need your wtv working at 5V, interconnect the diodes 4007 and go back that soldered pin to 3.3v.
By placing the two diodes in series with the 5v supply your dropping the voltage at the module input to 3.8v.
Essentially just feeding the module .5v over the recommended 3.3v.