XRobot

This demo project is for controlling RC Cars built with Arduino Board.

Mobile

[XRobot Mobile] is a .NET MAUI application.

<img src="./assets/XRobot-Mobile.gif" alt="Packet" width="300"/>

Built with

This project utilizes the following packages:

1 - Plugin.BLE (for Bluetooth communication)

2 - ReactiveUI (for MVVM, realtime data)

3 - SkiaSharp (for creating custom controls)

Microcontroller

[ XRobot uController ] is an AVR assembly code (I also included a C language version) for controlling a robot car via Bluetooth (serial port communication) and reading an analog sensor.

This code is written for ATmega328P uController only.

These are a few useful links :

• Atmega328P Datasheet

• Atmega328P Instruction Set

Features

This project utilizes the following features:

1 - Universal Asynchronous Receiver Transmitter (UART)

2 - Pulse Width Modulation (PWM)

3 - Analogue to Digital Converter (ADC)

Communication Protocol

XRobot uses serial communication to send packets and receive data from the RC robot.

• The validation uses a basic xor operation between packets to ensure the validity of the packet.

• Commands are used to specify to control the movement of the robot and reading from the robot.

• Data slots are used to carry additional information (e.g., direction and speed).

<img src="./assets/XRobot-Packet-Spec.png" alt="Packet" width="500"/>

Try it

Prerequisite

• You need Arduino installed in your machine (need avrdude for flashing).

• You need Powershell 6.1 at minimum installed.

Steps

1 - Clone the repo locally on your machine and open a Powershell window in the root folder.

2 - Copy the following commands and run in Powershell (press tab for autocomplete):

. .\run.ps1

Install-XRobot -Port COM3 -Upload

Componants

These are the components needed.

1- Ardunio Uno Board (or any board with Atmega328p).

<img src="./assets/arduino-uno.jpg" alt="Bluetooth" width="200"/>

2-Cytron Shield L298P Motor Driver with GPIO.

<img src="./assets/Shield-L298P.jpg" alt="Bluetooth" width="200"/>

3- Bluetooth Serial Transceiver HM-10

<img src="./assets/Bluetooth-HM-10.jpg" alt="Chassis" width="200"/>

4- Chassis with Two Motors

<img src="./assets/Chassis.jpg" alt="Chassis" width="200"/>

5- Power Source (for example. lipo-power-shield).

<img src="./assets/lipo-power-shield.jpg" alt="Chassis" width="200"/>

Author

Ayman Elfaki

Copyright

This project is under the GPL-3.0 License.