DX » Community » Reviews » EFCom Pro Wireless 850/900/1800/1900MHz GPRS/GSM Module w/ Antenna - White
Customer’s impression:
Easy to use Great! Nice and usefull GSM-module all in one GSM
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  • posted byFaulty on 12/10/2015

    Pros: Very good PCB, works well with Arduino. Cons: Very expensive, prices not competitive to Aliexpress.


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  • posted byFaulty on 11/04/2015

    Pros: Very easy to use, uses standard size sim card, no need to cut. Has all the functions, and responds very well with Arduino. Cons: None

    Impression:Great!,Easy to use,Nice and usefull GSM-module;

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  • posted byMelliw on 09/22/2015

    Voor de de Nederlandse mensen :-) Werkt perfect !! De aansluitpennen mogen direct op 5 volt aangesloten worden . Lees de Sim900 instructies voor het aansturen van de modem http://www.espruino.com/datasheets/SIM900_AT.pdf

    Impression:Nice and usefull GSM-module;

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  • posted bygtac79 on 06/15/2015

    Pros: - small print board - turnable and small antenna - easy access to sim-card-slot Cons: - little bit too expensive

    Impression:Nice and usefull GSM-module;

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  • posted bytruckmsk on 01/26/2015

    Easy to use device with full set of GSM/GPRS communication capabilities. Not only it can perform simple GSM actions (SMS, calls) but also it provides hi-level implementation of HTTP/FTP/SMTP/POP3/NTP operations. You will only need to execute a few easy to understand commands to upload file to or... Read more

    Impression:Great!,all in one GSM;

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  • posted byvladzzoni on 04/02/2014

    Robust design. All is soldered well. It has connector for microphone and speaker so you can make calls. It can be easily programmed using good known AT commands. Can be connected to micro-controller or Arduino through UART interface. To connect with PC you need TTL to USB converter. Bad quality I... Read more

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  • posted bypetlof on 03/08/2014

    Easy to integrate GPRS-module. The embedded HTTP-stack accessible by AT-commands simplifies HTTP-kommuncation. A very good form-factor makes in pretty easy to mount in integrated devices. Very good price for that functionality Difficult to find manual (must search on external sites). The included... Read more

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  • posted bydealagainto on 08/14/2013

    Just connect the rx-tx gnd, 5v, and works! I'm using it with a PIC16F887 and everything is okay. It communicates with SIM900 AT commands. - comes with pins, and mounting screws, easy to mount - you can save power by using the pwr pin to switch off from software - fast powerup -none found using or... Read more

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  • posted byAZGFOREVER on 06/16/2013

    really simple serial GSM modem. The use of a serial port and AT commands makes the SIM900 an almost universal GSM module, enabling its use on everything from 8 bit microcontrollers to high end 32 bit ARM microcontrollers and SOCs, FPGAs and even computers. AT commands support makes the module as... Read more

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  • posted bymarizo on 02/27/2013

    Really small all in one gadget. It works with my DIY USB-TTL adapter with FT232RL. I tested some AT commands - make call, accept call, send SMS, read SMS, delete SMS, looks like everything works like it should. I think the mic & phones sockets are swaped - usually the phone output is green. a... Read more

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