dermanu:
Sorry, next time I'll be more aware of the forum rules.
Actually, DrAzzy already help me a lot. I did connected TX to RX and vice versa, but well... the pins on the breakout board were lettered inverse. China... I should have tried it out beforehand.
Thanks
This is very common with Serial devices - do you label it with what the function of the pin is, or where to connect it? Often "TXO" and "RXI" are used to make it clearer (TX out, RX in).