You can find (almost) full info about it here: https://www.dfrobot.com/wiki/index.php/ ... KU:DFR0299
and of course you can buy some cheap "clones" for less then 2 Euros! (Which are working just fine)
https://www.ebay.com/sch/i.html?_from=R ... i&_sacat=0
I 've created a re-usable lua file to control this little device suing its serial interface. Using this file you can enable your creations to play music (or sound files).
The applications are limitless, from a wifi mp3 player to any automation or IoT device which needs to play rich sounds.
The code is available on GIT https://github.com/limbo666/dfPlayer
PANIC: unprotected error in call to Lua API (attempt to index a nil value)