SIM900

Software Arduino SIM
1

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.

2

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

3

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