These AT commands are well explained in its data sheet and can be found here in its official datasheet. You should ask (send) a command like “AT” and your module will reply “OK”. For example if you want to know if your module is active. Whatever that you might want to tell or ask to the GSM module it should only be via AT commands.
Codevisionavr commands serial#
Communicating with GSM module using AT commandsĪs you might have guessed it, the GSM module can communicate through Serial communication and could understand only one language and that is “ AT commands”. PIR Sensor and GSM Based Security SystemĪlso check all the GSM related projects here.GSM Based Home Automation using Arduino.Automatic Call answering Machine using Arduino and GSM Module.Wireless Notice Board using GSM and Arduino.You can build many cool projects using GSM module like: Now you can proceed with connecting you module with Phone or any Microcontroller. This means that your Module was capable to establish connection with your SIM card. Now wait for a minute or so, and you should see a red (or any other colour) LED Flashing once for every 3 seconds. Insert your SIM card in the slot of the module and power it on, you should notice a power LED going ON. See also AVR displays body temperature on a Nokia 3310 LCD using Atmega8 microcontroller You can download these softwares from the given links:
Codevisionavr commands software#
We will use CodeVisionAVR software for writing our code and SinaProg software for uploading our code to Atmega16 using USBASP programmer. Hence in this tutorial we will learn how we can Interface the GSM module (SIM900A) with AVR microcontroller ATmega16 and will demonstrate it by sending and receiving messages using GSM Module. This will open doors to lot of creative projects if it could be interfaced with a Microcontroller. You can also connect a normal microphone and speaker to this module and converse on your mobile calls. These modules could make all actions that our normal mobile phone could do, like making/receiving a call, sending/receiving a SMS, connecting to internet using GPRS etc. GSM modules are interesting to use especially when our project requires remote access.
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