connectiong GSM to 2 Arduino uno r3

Official Hardware Retired GSM Shield
1

Hi Everyone,

I want to connect my GSM shield to my Arduino uno r3 Model (Two Arduino Uno connecting together with serial communication (Master/slave)).

We have used Ground, 5 volt, A 5, A 4, for the serial communication between the two Arduino.

So I want to know what is the best way to connect the GSM shield to this model? And how can we connect it?

2

GSM Shield has the follow connections:

ARDUINO UNO -- GSM SHIELD

  • Pin digital 7 to CTRL
  • Pin digital 3 to GSM RX
  • Pin digital 2 to GSM TX
  • GND to GND (ground unified)
  • 5V to 5V (necessary to energize shield)