URGENT please : Modem GPRS V1 not giving "OK"

[frejus]

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

[Admin]

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.

[frejus]

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.

[Admin]

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