A robot car is a type of mobile robot that is designed to move on wheels or tracks. It can be controlled remotely or autonomously using a microcontroller or computer.
A basic robot car typically consists of the following components:
A robot car can be programmed to move in a specific pattern, follow a line, avoid obstacles, or navigate to a specific location using GPS. It can also be integrated with other devices such as a camera, microphone, or speaker to provide additional functionality.
Controlling a car via Bluetooth involves using a Bluetooth module to establish a wireless connection between a remote device (such as a smartphone or computer) and the car‘s microcontroller. Once the connection is established, the remote device can send commands to the car’s microcontroller, which can then control the car’s movement.
Here are the basic steps to control a car via Bluetooth:
Controlling a robot car using an Arduino microcontroller involves using the Arduino to receive input from sensors, process the data, and send commands to the robot car‘s motors. The Arduino can be programmed to control the robot car‘s movement based on the input from sensors, or to follow a specific pattern or navigate to a specific location.
Here are the basic steps to control a robot car using an Arduino:
Controlling a robot car using an Arduino microcontroller and a smartphone via Bluetooth involves using a HC-06 Bluetooth module to establish a wireless connection between the smartphone and the Arduino. Once the connection is established, the smartphone can send commands to the Arduino, which can then control the robot car‘s movement.
Here are the basic steps to control a robot car using an Arduino and a smartphone via Bluetooth:
In this tutorial, we will control a car using the Arduino board and a smartphone.
This is why we are going to create two programs: a mobile application with App Inventor for the smartphone and a program for the Arduino board.
The Arduino UNO is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button. It is commonly used for DIY electronics projects and for controlling a variety of devices. The board can be programmed with the Arduino IDE (Integrated Development Environment) software, which is a simple programming language based on C/C++.
The HC-06 Bluetooth module is a small, inexpensive device that allows for wireless communication between electronic devices using the Bluetooth protocol. It can be used to connect microcontrollers such as an Arduino to a smartphone or computer, allowing for wireless control or data transfer.
The HC-06 module operates as a slave device and can be configured to work with a wide range of baud rates. It can be powered by a voltage between 3.3V and 6V and consumes very low power. It supports both AT and transparent transmission mode.
It can be easily interfaced with microcontroller using UART communication. The HC-06 module can be used to implement wireless control and monitoring of various electronic projects, and it can be easily integrated into existing projects to add wireless functionality.
L293D Motor Controller Module
The L293D is a dual H-bridge motor driver integrated circuit (IC) commonly used in robotics and other electronic projects to control the speed and direction of DC motors. It allows for bidirectional control of two DC motors, or one stepper motor, and can drive currents of up to 600mA per channel. The L293D also has built-in protection against voltage spikes and overheating. It requires a supply voltage of between 4.5 and 36V and can be controlled using a variety of microcontrollers such as Arduino or Raspberry Pi.
A 2-wheel car robot kit is a collection of components that can be used to build a small, autonomous robot that moves on two wheels. These kits typically include a microcontroller, such as a ESP32 card, to control the robot’s movements, as well as motors, wheels, and other hardware to enable the robot to move and navigate.
2-wheel car robots are often used as educational tools, as they can be used to teach basic principles of robotics, electronics, and programming. They can also be used as a platform for experimenting with different control algorithms, sensors, and other hardware.
This robot kit is composed of:
2 gear motors (1:48)
2 car tires
1 universal wheel
A test plate is a type of device used in robotics to test the functionality and performance of various components or systems. It is typically a physical platform or structure that is designed to hold and support various test items or devices, such as sensors, actuators, motors, or other types of mechanical or electrical components. Test plates can be used to simulate different environments or conditions, such as temperature, humidity, vibration, or other factors, in order to evaluate the performance of the components or systems being tested. They can also be used to perform a variety of diagnostic or diagnostic tests, such as stress testing, endurance testing, or other types of evaluations.
Wires are used to transmit electrical signals and power to various components such as motors, sensors, and microcontrollers. It’s important to properly route and secure the wires to prevent tangles and damage. There are several methods for doing this, including using cable ties, clamps, and wire looms. It’s also a good idea to use different colors or labeling to identify the different wires and their functions. When connecting wires in a robot, it’s important to follow proper safety procedures, such as using the correct wire stripper and connectors, and wearing protective equipment such as gloves and safety glasses.
Here is the program which allows to connect the Arduino board to the smartphone and to receive a message containing the command order of the car.
//Initialize Serial Monitor
//Initialize Bluetooth Serial Port
//Read data from HC06
//Select function with cmd
Serial.print("Command recieved : ");
// We expect ON or OFF from bluetooth
motor1.run(FORWARD); //drive the car forward
motor1.run(BACKWARD);//back up the car
motor1.run(FORWARD); //turn the car to the left
motor2.run(FORWARD); //turn the car to the right
motor1.run(RELEASE); // stop car
cmd=""; //reset cmd
We are going to create a mobile application called ‘commander_voiture_arduino’ with App Inventor which allows the car to be controlled by the smartphone.
We propose to create the design of the application, with the following visual:
To program the application, App Inventor offers us to use the Blocks space, which allows you to create a program in the form of a block diagram. Very easy to use but requiring a little programming logic.
Here is the program of the application created in the Blocks area of the Inventor App: