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Microduino GPRS/GSM module plug in the SIM card and use some simple instructions to make Microduino core board connected to the Internet, and then send, receive text messages.
Features
- ESD protection；
- Uses USB powered or lithium battery solution；
- Supports automatic baud rate detection；
- Sends AT command and date via serial；
- Small, cheap, stackable, opened platfrom;
- Open source hardware circuit design, compatible with the Arduino IDE development environment for programming;
- Define unified interface Microduino specification and contain rich peripheral modules. Set up the quick connection with other Microduino modules and sensors easily and flexibly.
- 2.54 pitch row female connector for easy integration into breadboard.
Specifications
Uses SIM800L module to support four bands GSM/GPRS, working band is：GSM850、EGSM900、DCS1800 and PCS1900MHz.
- Electrical characteristics
- Working voltage：3.4V ~4.4V；
- Under Sleep mode, current consumption is 0.7 mA
- GPRS data
- GPRS data transfer up to 85.6 kbps;；
- Build-in TCP/IP protocol；
- Encoding format：CS-1, CS-2, CS-3 and CS-4；
- Support Unstructured Supplementary Service Data (USSD)
- Serial debug
- Supports standard full-function serial, and transmission rate from 1200bps to 115200bps;；
- Supports GSM 07.10 protocol serial multiplexing function；
 Microduino-SIM800L-Pinout  Microduino-SIM800L-Pinout - SIM card power and base plant
Document
Development
You can use GSM library to test, https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Libraries/_03_Microduino_GSM_SIM800L
Note：This library only supports Microduino-core.
Application
Send the text message using library's example program.
Prepare Work
- Prepared hardware：Microduino FT232R, Microduino Core, Microduino GSM, USB cable or lithium battery；
- Prepared software: GSM library, Arduino IDE (1.0.3 release and upper)；
- Uncompress the zip folder to libraries of Arduino IDE；
- Connect the Microduino FT232R and PC using USB cable to download program and serial monitor；
- USB data cable or lithium battery to power Microduino GSM module and press the power button to make Microduino GSM boot, about maintaining 4S, turn on lights to indicate a successful boot.
Debug
- Open the example program SendSMS from examples folder；
- After compiled, select the board "Microduino Core (Atmega328P@16M,5V)", download directly；
- Opne the serial monitor, set the baud rate, and set to the line and press enter, will print "SMS Messages Sender";
- Input is completed, press enter, it will prompt you to input the sent content,
- Input is completed, press enter, you can see the text message sending progress. After completed, displays "COMPLETE!".
Bug
History
Picture
 Microduino-GPRS/GSM Front  Microduino-GPRS/GSM Front  Microduino-GPRS/GSM Front  Microduino-GPRS/GSM Front Video
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