The fifth video is about the hardware of our project.
The Elecrow Simduino was the main part of the hardware. It combines Arduino Uno and sim808 module. The fusion between these parts enabled us to save costs and place at the beginning. Unfortunately, we changed the Elecrow for an official Arduino Mega 2560. The mega-2560 is designed for more complex projects and allowed us to have more space for the program. The memory of the elecrow was too limited.
The mega-2560 costs 35€ on the official website. It is a microcontroller board based on the Atmega2560. To get started, the user just needs to connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery. You can find all the needed information about it on their website.
The Sim808 costs approximately 40 dollars. This module is a GSM and GPS two-in-one function module. It is based on the latest GSM/GPS module SIM808 from SIMCOM. It features ultra-low power consumption in sleep mode and integrated with charging circuit for Li-Ion batteries. The module supports 3.3V and 5V logical level.
To connect our microcontroller to the car, we will need a can bus shield. There is no change on that part. CAN-BUS is a common industrial bus because of its long travel distance, medium communication speed and high reliability. It is found in cars. The shield costs approximately 20 dollars.
The 12-volt car batteries are ok to run the Arduino. However, one of the problems is the oscillatory behavior of the voltage in these batteries. To avoid problems, we decided to install a step-down switching regulators. This regulator will fix the output voltages to 7-volts. We bought it at 1 dollar on eBay.
Approximately, you will need 100 dollars to carry out this project if you decide to go for top-quality components.
Don’t hesitate to ask us your questions about our choices.
See you soon in our last videos.