Geeetech

Hello,

I have an arduino and your modem GPRS V1 which I purchased yesterday

Everything was working fine yesterday until this morning11h00 am... So this product life was less than one day...

Problem : at 19200, when I type "AT", I receive "Yû" instead of "OK". I have the same problem at every speed, i just receive a different answer than "Yû" but never "OK"
It was working perfectly yesterday and this morning, then it stopped working.

Is there a way to make a hardware factory reset ? Remember that it will not understand AT&F0, at any speed.

Thank you

The return value you get is messy code after you sending "AT". Please check the connection of serial port:
1. Check the connection between GPRS module and UNO, or disconnect the GPRS and re-plug it on the UNO.
2. Make sure TX and RX of GPRS have been connected to RX and TX of UNO

Try 9600 Bauds.

Tx.

My Nano seems to be dead now on the USB side, I can only power it from Vin.
I am going to buy another arduino but not that fragile nano.

Would you advise arduino nano or arduino mega as the most standard / solid one ?

Thx.

Nano and mega have their own speciality and advantage respectively. And the price of them are also different.
The resource for mega is more abundant relatively, and it has a more powerful expansibility. I recommend Arduino mega
http://www.geeetech.com/arduino-mega2560-p-174.html