Difference between revisions of "Microduino-GPRS/GSM"

Microduino-USBHOST

Microduino-GPRS/GSM module can get Microduino core board connected to the internet and achieve the function of sending and receiving messages when it is just inserted with a SIM card and follows some simple instructions.

Features

• ESD protection;
• Capable of being charged by USB, li-ion or other power supply options;
• Support automatic baud rate detection function;
• Capable of sending AT instructions and data through the serial port;
• Small, cheap, stackable and open;
• Open hardware circuit design and Arduino compatible programming development environment;
• Uniformed Microduino interface standard and rich peripheral modules, capable of having a fast and flexible connection and extension with other modules and sensors in accord with Microduino interface standard;
• Easy to be integrated to pegboards with a 2.45-pitch female header connector interface.

Specifications

Adopt SIM800L module to support four-band GSM/GPRS, whose working band is：GSM850, EGSM900, DCS1800 and PCS1900MHz.

• Electrical characteristics
  • Working voltage：3.4V ~4.4V；
  • The current consumption is 0.7 mA under the Sleep Mode

• GPRS data
  • The maximum data transmission rate of GPRS is 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 debugging
  • Support standard full-function serial as well as the transmission rate with a range from 1200bps to 115200bps;
  • Support the serial port multiplexing function complying with GSM 07.10 protocol；

• Two Main Components:
  • SIM800L module

Microduino-SIM800L-Pinout

Microduino-SIM800L-Pinout

• • SIM card power and base plant

Microduino-SIM-Pinout

Microduino-SIM-Pinout

Document

• Eagle PCB： File:Microduino-GSM.zip
• Microduino-GSM module SIM800L：File:SIM800L.pdf
• SIM car power supply and the card base：File:SIM800L.pdf

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 short messages using the example program.

Preparation

• Hardware：Microduino FT232R, Microduino Core, Microduino GSM, USB cable or lithium battery；
• Software: GSM library, Arduino IDE (version 1.0.3 and higher)；
• Uncompressed the zip folder to libraries of Arduino IDE；
• Connect the Microduino FT232R and PC using USB cable to download program and monitor the serial port；
• USB cable or li-ion battery to charge the Microduino GSM module and press the power button for a long time to activate Microduino GSM for about 4 seconds. That the power-on indicator goes on shows a successful start.

Debugging

• Download the test program:

https://github.com/Microduino/Microduino_Tutorials/commit/25a821ba8894fb02d4b1560c9912450cc353b875

• Open the test program, and then you need double check the following parameter:
  • “#define NUM "13667928xxx"”：Need change to the number that receive message.
  • “#define SMS_CEN "13010720xxx"”：Your message center for you own mobile phone number, you can find it in your phone. It isn't the necessary. If hit an issue during send a message, you can try it.
• Compile the program, select the board type "Microduino Core+ (Atmega644P@16M,5V)", download directly:
• Open the serial monitor, set the baud rate is 9600:
  • Input "t", to send the message "wiki.microduino.cc";
  • Input "d", you can make a call, but can't finish a normal call, because no the speaker and microphone;
  • Input "h", you can submit a HTTP request to get some data from network;
  • Input "s", you can send the sensor data to network.

• 如果你使用Microduino Core调试，你需要用到软串口（TX1，RX1）
• If you use the Microduino Core to debug, must use the Software Serail (TX1,RX1)
  • Use the Software Serial library

#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3); // RX, TX

• • Change the Serial1 to mySerial, it should be ok。

• If you use the Microduino CoreUSB to debug, you only need to change the serial to serial 0 (TX0,RX0).

Microduino-SIM800L-Pinout

FQA

• Does this module can be used to make a voice phone? Any voice pin was picked out?
  • This module can’t be made a voice phone, because it doesn’t have pin.
• Does this module can work with Core+ module?
  • Yes.
• Does this module can use Arduino GSM library?
  • Yes.
• Does this module can use to 3G?
  • No, it only supports GPRS and GSM.
• How to power on this module?
  • There are two methods:
    • Using the USB on attached module to supply the power, the voltage is 5V and the current MUST lager than 1A.
    • Using Li-ion battery on attached module to supply the power, the Li-ion should be 3.7V.

BM module can power on the Core module and other module, such as 10DOF, but don't suggest to power GPRS/GSM module, because it is a big power consumption module.

Purchase

History

Picture

Microduino-GPRS/GSM Front

Microduino-GPRS/GSM Front

Microduino-GPRS/GSM Front

Microduino-GPRS/GSM Front

Video