SIM900

[Jburnett72]

Will the Arduino SIM work with the SIM900 by SimCom? Ive tried everything to get this thing to work but its not happening. Im a complete noob when it comes to this and have tried every tutorial ive found with no luck.

[maolana]

is sim900a work in Egypt and what is the changes (hertz or something else)to make it activated?

[admmek]

Try this.

- Set Jumper in SIM900 module to work with hardware Serial, not de pins 7&8, you will use 0&1.
- Next, connect SIM900 module to Arduino connecting:

SIM900                   Arduino
pin 0     -----------> pin 1
pin 1     -----------> pin 0
GND      -----------> GND

5v         -----------> 5v
GND      -----------> GND

- Connect Arduino board to PC using USB port.
- Empty the Arduino board, dont load anything.
- Open Monitor and use 9600 or 19200 baud.
- Type AT and press ENTER. You will receive an OK or 0 message.

If you receive a response, then you have connection and your modem is working fine.

Next steps are:

- Check the SIM card, area able to call and send SMS. You can check it using a smartphone.
- Put the SIM card in your SIM900 board and check it is connected to net with command AT=CSQ?, you will receive a +CSQ : 0.XX.

Good luck