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Arduino GPRS SimCom - Sim900 - quadband - GMS Shield


On this post it is showed the basics to work with GPRS SIMCOM SIM900 quad band GSM shield fully compatible with Arduino.


Ethernet or 20 I/Os PLC:      Ethernet PLC     20 I/Os PLC    

Industrial Shields boards:   Industrial Shields Boards

GPRS SIMCOM SIM900 quad band GSM Shield


This shield has the following features:

  1. Quad-Band 850/900/1800/1900MHz
  2. GPRS multi-slot class 10/8
  3. GPRS mobile station class B
  4. Compliant to GSM phase 2/2+
  5. Class 4 (2W@850/900MHz)
  6. Class 1 (1W@1800/1900MHz)
  7. Control via commands (GSM 07.07, 07.05 and SIMCOM enhanced AT
  8. Short message service
  9. Free serial port selection
  10. 3.5 inch standard sonic sockets for MIC and phone
  11. Operation temperature: -40℃ ~ +85℃


The pins of the shield are the following ones:

Reset1Reset hte SIM900 module
P2Power Switch pin of SIM900 module
Tx3UART data in
Rx 4UART data out
DT5Debug UART data output
DR6Debug -UART data input



To connect this shield with our Products you just simply need to connect Rx and Tx to an RX/TX interface of our devices. You also need to connect the GND to the GND of the PLC. The last thing is to power supply VCC that this shield is powered with 5V. It can be used the 5V output of the PLC. To configure the shield now it only depends on the software.

If you use an external power supply you have to take in mind that you need to connect the GND to have a common GND for the supply, the PLC and the shield.

It will be let a link to see a simple tutorial and how it is done the software part:


Looking for your ideal PLC?

Take a look at this product comparison with other industrial controllers Arduino.

We are comparing inputs, outputs, communications and other features with the ones of the relevant brands.

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