I ordered the EFCom Pro GSM module this month and to be honest it was beyond “fun” to get it working. Being cheap I ordered it for half of what. Power Supply: +5V; 1x GPRS Module -EFCom Pro; 1x 4 Frequency antenna; 4x Copper cylinder; Control via AT commands (GSM , and EFCOM. Only US$, buy EFCom Pro Wireless ///MHz GPRS/GSM Module w/ Antenna – White from DealExtreme with free shipping now.

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This module support software power on and reset. You just need connect as below: If you want to make voice calls, you would eefcom require a headset with microphone. So you received your GPRSwhat would be the first thing you would want to do with it?

GPRS/GSM Module-EFCom Pro EFComPro (EF-03045)

Send out a text SMS to your cell phone? On a Mac you may use pr command line application “screen” available through Terminal. The best way to do this using an Arduino board is described below.

Arduino One boards are confirmed to work as well January For developing such a program, we require installation of a new Arduino library – NewSoftSerial Notice: See example code below. The library can be obtained from here.

Extract the folder NewSoftSerial from within this. Make sure to restart the Arduino IDE after the library.

For users with Arduino 1.


However, you must be aware that the buffer reserved for incoming messages are hardcoded to 64 bytes in the library header, “SoftwareSerial. This means that if the GPRS module responds with more data than that, you are likely to loose it with a buffer overflow! Now that our test setup is ready, let’s play around with some AT Commands before moving on to programming the Arduino lro do it by efvom instead of doing it manually.

To start off let’s try sending an SMS. If, in spite of following the steps as specified above, you aren’t able to receive the message on the target handset, then it might be that you need to set the SMS Message Center number. You can get the message center number by calling up the customer care center of the GSM Service Provider and asking them for it. Now that you have gotten a taste of how the AT Commands work, you can try out some more of them before moving on to developing sketches for Arduino to use the GPRS.

GPRS/GSM Module-EFCom Pro EFComPro

You can go through the AT Commands reference manual to figure out the sequence of commands required to do a particular task. If while developing an Arduino sketch, you find that the GPRS isn’t what efcpm expected it to do, then you will need to check your AT Commands and their sequence. To do this, reload the serial relay sketch attached above in the getting started section into ATmegaP and type out the AT Commands manually and check the output.


A C program to perfom the same task as the serial relay sketch present above has also been developed and attached: The program was developed on a Windows PC. XLoader is such a program which runs on Windows can upload.

This section is a work in progress Here are the list of connectors lro pin headers present on-board the GPRS:. The Arduino sketch for sending an SMS is presented below. It has been tested on Arduino Duemilanove but will work on any compatible variant.

ElecFreaks – ElecFreaks

Please follow the following steps for running this sketch. But the library used. Bug Tracker is the place you can publish po bugs you think you might have found during use. Please write down what you have to say, your answers will help us improve our. The Additional Idea is the place to write your project ideas about this product, or other usages you’ve found. Or you can write them on Projects page.

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This page was last edited on 8 Mayat