Summary of GSM module Interfacing with PIC Microcontroller – Make and Receive Calls
This tutorial explains interfacing a SIM900A GSM module with a PIC16F877A microcontroller to enable call and SMS functionality. The setup establishes a serial connection by linking the module's Tx/Rx pins to the microcontroller's Rx/Tx pins, while ensuring a common ground. An LCD display is integrated to monitor the system status, allowing users to make and receive calls directly through the microcontroller interface.
Parts used in the GSM Interfacing with PIC Microcontroller Project:
- SIM900A GSM Module
- PIC16F877A Microcontroller
- LCD Display
- Microphone
- Speaker
GSM modules are fascinating to use especially when our project requires remote access. 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. You can also connect a normal microphone and speaker to this module and converse on your mobile calls. This will open doors to lot of creative projects if it could be interfaced with a Microcontroller. Hence in this tutorial we will learn how we can Interface the GSM module (SIM900A) with our PIC microcontroller and will demonstrate it by making and receiving call using GSM Module. We have previously interfaced it with Arduino and Raspberry Pi for calling and messaging
We have simply interfaced the Tx and Rx pins of the GSM module with the Rx and Tx pins of the PIC MCU PIC16F877A respectively. This will establish a Serial connection between both. Also, so do not forget to common ground both the GSM and PIC module. We have also used a LCD display to know the status of our GSM module. Once the connections are done your hardware will look like something below.
for more detail: GSM module Interfacing with PIC Microcontroller – Make and Receive Calls
- What actions can GSM modules perform in a project?
GSM modules can make or receive calls, send or receive SMS messages, connect to the internet using GPRS, and allow conversation via connected microphone and speaker. - How are the GSM module and PIC MCU connected?
The Tx pin of the GSM module connects to the Rx pin of the PIC MCU, and the Rx pin of the GSM module connects to the Tx pin of the PIC MCU. - Why is it necessary to common ground both modules?
Common grounding is required between the GSM module and the PIC module to establish a proper electrical reference for the serial connection. - What component is used to know the status of the GSM module?
An LCD display is used to indicate the status of the GSM module during operation. - Can this project be used for remote access?
Yes, GSM modules are suitable for projects requiring remote access as they replicate mobile phone actions. - Does this tutorial cover making and receiving calls?
Yes, the tutorial demonstrates how to make and receive calls using the GSM module interfaced with the microcontroller. - Has this module been interfaced with other devices previously?
Yes, the SIM900A has previously been interfaced with Arduino and Raspberry Pi for calling and messaging.
