Keyless bike Project using Arduino and Android app

Keyless bike Project using Arduino and Android app

TM1637 Pin

Arduino Pin

VCC

5V

GND

GND

DIO

D3

CLK

D2

NRF24L01 Remote Control for RC Car and Plane using Arduino

Controlling RC cars and planes wirelessly using Arduino has become an exciting and educational project for hobbyists and makers. With the help of the NRF24L01 wireless transceiver module, you can build your own custom remote control system that’s both reliable and cost-effective. This article will guide you through how to create an NRF24L01-based remote control for your RC car or plane using Arduino.

What is NRF24L01?

The NRF24L01 is a popular 2.4GHz transceiver module developed by Nordic Semiconductor. It is widely used for wireless communication between two or more Arduino boards due to its:

Long range (up to 100 meters with antenna)

• Long range (up to 100 meters with antenna)

Low power consumption

• Low power consumption

High data rate (up to 2 Mbps)

• High data rate (up to 2 Mbps)

SPI communication interface

• SPI communication interface

It’s a great alternative to expensive commercial RF modules for RC projects.

Components Required

To make this project work, you’ll need:

2 × Arduino boards (Uno/Nano/Pro Mini)

• 2 × Arduino boards (Uno/Nano/Pro Mini)

2 × NRF24L01 modules

• 2 × NRF24L01 modules

Joystick module or push buttons (for transmitter)

• Joystick module or push buttons (for transmitter)

Motor driver (L298N or similar for car)

• Motor driver (L298N or similar for car)

RC car chassis or a small plane

• RC car chassis or a small plane

Batteries and jumper wires

• Batteries and jumper wires

Project Overview

This system has two main parts:

Transmitter (Remote): Sends control signals using joystick or buttons.

• Transmitter (Remote): Sends control signals using joystick or buttons.

Receiver (Car/Plane): Receives signals and controls the motors accordingly.

• Receiver (Car/Plane): Receives signals and controls the motors accordingly.

Circuit Connections

Transmitter Side (Arduino + NRF24L01 + Joystick):

NRF24L01:

VCC → 3.3V (Use a capacitor or adapter if needed)

• VCC → 3.3V (Use a capacitor or adapter if needed)

GND → GND

• GND → GND

CE → D9

• CE → D9

CSN → D10

• CSN → D10

SCK → D13

• SCK → D13

MOSI → D11

• MOSI → D11

MISO → D12

• MISO → D12
• NRF24L01:VCC → 3.3V (Use a capacitor or adapter if needed)GND → GNDCE → D9CSN → D10SCK → D13MOSI → D11MISO → D12

Joystick:

VRx → A0

• VRx → A0

VRy → A1

• VRy → A1

SW → D2 (optional)

• SW → D2 (optional)
• Joystick:VRx → A0VRy → A1SW → D2 (optional)

Receiver Side (Arduino + NRF24L01 + Motor Driver):

NRF24L01 is connected the same as on the transmitter side.

• NRF24L01 is connected the same as on the transmitter side.

Connect motor driver's inputs to Arduino pins and outputs to the motors.

• Connect motor driver's inputs to Arduino pins and outputs to the motors.

How It Works

The joystick reads analog values and sends them via NRF24L01 from the transmitter.

• The joystick reads analog values and sends them via NRF24L01 from the transmitter.

The receiver Arduino reads these values and drives the motors based on direction and speed.

• The receiver Arduino reads these values and drives the motors based on direction and speed.

This wireless communication is fast and can control both RC cars and planes smoothly.

• This wireless communication is fast and can control both RC cars and planes smoothly.

Sample Transmitter Code Snippet

cpp

CopyEdit

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(9, 10);
const byte address[6] = "00001";
int data[2]; // X and Y values from joystick

void setup() {
radio.begin();
radio.openWritingPipe(address);
radio.setPALevel(RF24_PA_HIGH);
radio.stopListening();
}

void loop() {
data[0] = analogRead(A0); // X-axis
data[1] = analogRead(A1); // Y-axis
radio.write(&data, sizeof(data));
delay(10);
}

cpp

CopyEdit
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(9, 10);
const byte address[6] = "00001";
int data[2]; // X and Y values from joystick

void setup() {
  radio.begin();
  radio.openWritingPipe(address);
  radio.setPALevel(RF24_PA_HIGH);
  radio.stopListening();
}

void loop() {
  data[0] = analogRead(A0); // X-axis
  data[1] = analogRead(A1); // Y-axis
  radio.write(&data, sizeof(data));
  delay(10);
}

The receiver code will read these values and convert them to motor control signals.

Applications

Wireless RC cars

• Wireless RC cars

Drones or remote planes

• Drones or remote planes

Wireless robotics projects

• Wireless robotics projects

Home automation control systems

• Home automation control systems

Conclusion

Building an NRF24L01-based remote control system for an RC car or plane is a rewarding and practical project. It introduces you to wireless communication, sensor interfacing, and motor control. Whether you’re an electronics hobbyist or a student, this project helps you understand how real-world wireless systems function.

Let me know if you’d like the receiver code, wiring diagrams, or a longer guide with images!

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Keyless Bike Project Using Arduino and Android App

Losing bike keys or forgetting them at home can be frustrating. But what if you could unlock your bike using just your smartphone? This is where the Keyless Bike Project using Arduino and Android App comes in. It’s a smart, DIY solution that allows you to control your bike's ignition wirelessly using Bluetooth technology — no physical key required!

In this article, we’ll explore how this project works, the components needed, and how you can build your own keyless bike ignition system.

What is a Keyless Bike System?

A keyless bike system allows the rider to start or stop the bike without a physical key. Instead, it uses a Bluetooth-enabled Android app to communicate with an Arduino board connected to a relay module that controls the ignition. When the correct signal is received, the Arduino activates the relay, turning the bike ON or OFF.

Components Required

To build this project, you’ll need the following:

Arduino Uno or Nano

• Arduino Uno or Nano

HC-05 Bluetooth module

• HC-05 Bluetooth module

2-channel relay module

• 2-channel relay module

Android smartphone with a Bluetooth terminal app

• Android smartphone with a Bluetooth terminal app

Jumper wires

• Jumper wires

12V battery (from the bike)

• 12V battery (from the bike)

Ignition wire of the bike (to be connected via relay)

• Ignition wire of the bike (to be connected via relay)

Circuit Diagram and Connections

HC-05 Bluetooth Module:

VCC → 5V (Arduino)

• VCC → 5V (Arduino)

GND → GND

• GND → GND

TX → RX (Arduino)

• TX → RX (Arduino)

RX → TX (Arduino via voltage divider)

• RX → TX (Arduino via voltage divider)
• HC-05 Bluetooth Module:VCC → 5V (Arduino)GND → GNDTX → RX (Arduino)RX → TX (Arduino via voltage divider)

Relay Module:

IN1 → D8 (Arduino)

• IN1 → D8 (Arduino)

IN2 → D9 (optional, if using a second function)

• IN2 → D9 (optional, if using a second function)

VCC → 5V

• VCC → 5V

GND → GND

• GND → GND
• Relay Module:IN1 → D8 (Arduino)IN2 → D9 (optional, if using a second function)VCC → 5VGND → GND

Ignition Wire:

Cut the bike’s ignition wire and connect each end to the relay’s NO (Normally Open) and COM terminals. When the relay is activated, it completes the circuit, turning the bike ON.

• Cut the bike’s ignition wire and connect each end to the relay’s NO (Normally Open) and COM terminals. When the relay is activated, it completes the circuit, turning the bike ON.
• Ignition Wire:Cut the bike’s ignition wire and connect each end to the relay’s NO (Normally Open) and COM terminals. When the relay is activated, it completes the circuit, turning the bike ON.

How It Works

The HC-05 Bluetooth module is paired with your Android phone.

• The HC-05 Bluetooth module is paired with your Android phone.

When you open the Bluetooth terminal app and send a specific command (e.g., "A" for ON, "B" for OFF), it is received by the Arduino.

• When you open the Bluetooth terminal app and send a specific command (e.g., "A" for ON, "B" for OFF), it is received by the Arduino.

The Arduino reads the command and activates the relay to control the bike’s ignition.

• The Arduino reads the command and activates the relay to control the bike’s ignition.

This system ensures that only someone with the authorized phone can start the bike.

• This system ensures that only someone with the authorized phone can start the bike.

Sample Arduino Code Snippet

cpp

CopyEdit

char data = 0;

void setup() {
Serial.begin(9600);
pinMode(8, OUTPUT); // Relay pin
digitalWrite(8, LOW);
}

void loop() {
if (Serial.available()) {
data = Serial.read();
if (data == 'A') {
digitalWrite(8, HIGH); // Bike ON
}
if (data == 'B') {
digitalWrite(8, LOW); // Bike OFF
}
}
}

cpp

CopyEdit
char data = 0;

void setup() {
  Serial.begin(9600);
  pinMode(8, OUTPUT); // Relay pin
  digitalWrite(8, LOW);
}

void loop() {
  if (Serial.available()) {
    data = Serial.read();
    if (data == 'A') {
      digitalWrite(8, HIGH); // Bike ON
    }
    if (data == 'B') {
      digitalWrite(8, LOW); // Bike OFF
    }
  }
}

Benefits of This Project

Enhanced Security: No physical key means harder to duplicate.

• Enhanced Security: No physical key means harder to duplicate.

Convenience: Unlock/start your bike directly from your phone.

• Convenience: Unlock/start your bike directly from your phone.

Low-Cost Implementation: Uses easily available Arduino and Bluetooth modules.

• Low-Cost Implementation: Uses easily available Arduino and Bluetooth modules.

Customizable: You can add more features like horn control or location tracking.

• Customizable: You can add more features like horn control or location tracking.

Final Thoughts

This Keyless Bike Project is a great example of how IoT and Arduino can bring smart features to everyday vehicles. It's perfect for students, hobbyists, or bike enthusiasts looking to upgrade their ride. While this project is designed for educational purposes, with a bit of refinement, it can be made robust enough for real-world use.

Just make sure to follow safety precautions when working with your bike’s electrical system.