Arduino Forum

Using Arduino => Networking, Protocols, and Devices => Topic started by: viveksoni95 on Jan 31, 2015, 01:17 am

Title: GSM/GPRS MODEM (SIM900A)
Post by: viveksoni95 on Jan 31, 2015, 01:17 am
I am trying to use a SIM900A based GSM modem.
Whenever I am making the GND of module and arduino uno common, the GSM modem doesn't work.
I tried the GSM modem with some other board and its perfectly working.
What can be the issue with Arduino Uno's UART. I tried softwareserial (pin2 , pin3) as well as on default Tx, Rx of arduino, but still not working.