0

I need your help. I am newbie in here I want to create communication between arduino and sim900 gsm/gprs module, but I am still confuse about the wiring

there are two type wirings in sim900 to arduino, hardware serial wiring and software serial wiring. Which one do i have to use ? Hardware serial wiring or software serial wiring

thanks

user7131683
  • 1
  • 1

2 Answers2

0

I think the sim900 has an I2C interface. If you are using an Arudino-Uno, the hardware serial port it used to communicate to your PC, therefore, I would use the I2C interface. See the "Wire" https://www.arduino.cc/en/Reference/Wire library for examples.

tddguru
  • 392
  • 1
  • 4
  • so.. i have to use software serial to make communication between arduino-uno and sim900, right ?? – user7131683 Nov 09 '16 at 08:44
  • The sim900 seems to have a choice of different interfaces. I was suggesting that you use the I2C instead of the normal uart-serial interface. – tddguru Nov 11 '16 at 02:04
0

On SIM900, use the Pins named TXD and RXD to connect to Digital Input Pins on Arduino.

Raky
  • 29
  • 9