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How to use GPRS Module Sim800L Library
On this post is showed how to use the GPRS Module Sim800L library.
This library is developed by Adafruit and communicates with GSM modules through Serial TTL.
The library required the usage of library SoftwareSerial.h
GPRS Module basic description
Equipment based on the Arduino tehnology designed for a profesional use. This PLC has 17 I/Os. It also contains several communication ports which provide more flexibility and control.
The GPRS/GSM Controller offers the possibility to expand up to 127 modules through I2C. This model also includes GPRS Hardware for GPRS communication. SIM card not included!
Sim800L general specs (GPRS Integrated module):
§ Class 4 (2W at 850 / 900MHz)
§ Class 1 (1 W at 1800 / 1900MHz)
This code will receive an SMS, identify the sender's phone number, and automatically send a response.
The internal connections between the internal Arduino Mega of the GPRS Module and the Sim800L are shown below:
|Arduino Mega Pinout||Sim800L Pinout|
|Tx1 (Pin 18)||TxD|
REMEMBER: Open up the serial console on the Arduino at 115200 baudrate!