Hello !
I've baught this :
http://www.ebay.fr/itm/310739126148?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
But since I received it, imùpossible to make it work... I need to make it work with arduino mega, due and nano but I've absolutely no results...
I've wired the vcc and GND and the RX and TX together and even reversed RX and TX but without success... Serial.println("...") or serial.write("...") seems to have no effect at all... I don't know what to do anymore...
Can you help me please ?