I have Simcom SIM900a GSM (SIM900a Mini DEV Board v3.9.2) and I am interfacing it with Arduino UNO. I have no idea how to connect SIM900a to Arduino UNO.
I connect the following Pin from above Image to:
GND (Digital GND near Pin 13)
5V of Arduio
GND of Arduino near 5V
Digital Pin 0 of Arduino (RX)
Digital Pin 1 of Arduino (TX)
1 to: (No idea)
From Picture option 7, 8, 9 are not connected to anything.
Can you please guide me am I doing right?
I am getting hard time to find out what is
RX in my SIM900a module as it is not written there.
When I upload sketch of:
Example > GSM > TestModem:
to Arduino, I got this output from Serial Monitor:
Starting modem test...ERROR, no modem answer.
Checking IMEI...Modem's IMEI: 0
Reseting Modem... Modem is functioning properly: IMEI: 0