SIM800L with arduino Tutorial. How to send, receive SMS and make a call.

Summary

This tutorial demonstrates how to use the SIM800L module with an Arduino to send/receive SMS and make calls. It covers the required components, including the Arduino, SIM800L, jumper wires, and SIM card, along with a step-by-step guide to wiring the module. After uploading the code to Arduino, users can interact with the module via the serial monitor, testing SMS functionality and making calls. The video provides clear instructions on connecting the module, observing signal strength, and troubleshooting common issues like receiving SMS, ensuring a smooth setup for beginners.

Takeaways

• 😀 SIM800L is a GSM/GPRS module that allows communication through SMS and voice calls with an Arduino.
• 😀 You need an Arduino board, SIM800L module, jumper wires, and a SIM card to set up the project.
• 😀 The SIM800L module requires soldering of header pins before use, with one header reserved for the antenna.
• 😀 After soldering the headers, connect the SIM800L to the Arduino using the ground, TX, RX, and VCC pins.
• 😀 The LED indicator on the SIM800L module helps determine signal strength. Slow blinking means a good signal, while fast blinking means no signal.
• 😀 The Arduino IDE is used to upload code to the Arduino, and the Serial Monitor helps interact with the SIM800L module.
• 😀 The code needs to be edited with your phone number to enable sending and receiving SMS and making calls.
• 😀 In the Serial Monitor, typing 'S' sends an SMS, 'R' receives an SMS, and 'C' makes a call.
• 😀 SMS can be sent and received successfully after uploading the code and connecting the hardware.
• 😀 When making a call through the Serial Monitor, you will see 'NO ANSWER' in the monitor if the call is not picked up.
• 😀 This tutorial demonstrates basic SMS and call functionality with the SIM800L module and Arduino, ideal for beginners in embedded systems.

Q & A

What is the purpose of the SIM800L module in this tutorial?

The SIM800L module is used in this tutorial to send and receive SMS messages and make phone calls when connected to an Arduino.

Why do we need to solder headers to the SIM800L module?

The SIM800L module comes unsoldered, so you need to solder headers to allow proper connection with the Arduino and other components.

What wires are needed to connect the SIM800L module to the Arduino?

You need four jumper wires: ground, TX, RX, and VCC, which connect the SIM800L to the Arduino.

What is the significance of the LED indicator on the SIM800L module?

The LED indicator shows the connection status of the module. A slow blink means the module has a signal, while a fast blink indicates it's searching for a signal.

Which pins on the Arduino are used to connect the TX and RX of the SIM800L?

The TX pin of the SIM800L is connected to Pin 10 on the Arduino, and the RX pin of the SIM800L is connected to Pin 11 on the Arduino.

What should you do after inserting the SIM card into the SIM800L module?

After inserting the SIM card into the SIM800L module, you should connect the Arduino to the computer using a USB cable to power the module.

How can you send an SMS using the SIM800L with Arduino?

To send an SMS, open the serial monitor, type 'S', and press Enter. The SMS will be sent to the phone number specified in the code.

What happens in the serial monitor when an SMS is successfully sent?

In the serial monitor, you will see an 'OK' response from the SIM800L module after sending an SMS, confirming the action.

What should you do to make a phone call using the SIM800L?

To make a phone call, type 'C' in the serial monitor and press Enter. The SIM800L will initiate the call.

How can you test receiving an SMS on the SIM800L module?

To test receiving an SMS, send a message to the SIM800L from another phone. The message will appear in the serial monitor.

Why is it important to edit the phone number in the code?

Editing the phone number in the code is necessary so that the SIM800L can send SMS messages and make calls to the correct number.

What does the 'NO ANSWER' message in the serial monitor indicate?

The 'NO ANSWER' message indicates that the call was not answered when it was initiated by the SIM800L module.