Recently I bought a VM202N, connected the push buttons according to the manual. The unit plays MP3 well after power-up, so it seems to work fine. What puzzles me, is that the 3 push buttons behave COMPLETELY different as described.
The “PREV” button works as volume-up and the “NEXT” button as volume down. The PLAY/PAUZE button seems to have no function.
This can’t be a coincidence. Are there hidden functions in this module which I have accidentally triggered? For instance by accidently raising the supply voltage higher than 5 V for an instant…?