How to Make Arduino Gesture Control Robot using Arduino Nano, NRF24L01 and ADXL335

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⚡ Project Level: Intermediate

⏱ Time Required: 1–2 Hours

💰 Budget: Medium

🤖 Control: Hand Gesture (Wireless)

INTRODUCTION

Want to control a robot using your hand gestures? In this project, you will learn how to build an Arduino Gesture Control Robot using Arduino Nano, NRF24L01 wireless module, and ADXL335 accelerometer.

The robot moves forward, backward, left, and right based on your hand movements. This is an advanced robotics and IoT-based project.

WATCH YOUTUBE VIDEO

COMPONENTS REQUIRED

Image	Name	Qty	Buy
	Arduino Nano	2	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	NRF24L01 Module	2	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	ADXL335 Accelerometer	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	L298N Motor Driver	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	DC Motors	4	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	Jumper Wires	-	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}

TOOLS REQUIRED

Image	Tool	Qty	Buy
	Screwdriver	1	{getButton} $text={Buy Tool} $icon={cart} $color={#007bff}
	Wire Cutter	1	{getButton} $text={Buy Tool} $icon={cart} $color={#007bff}

APPS AND ONLINE SERVICES

Logo	App	Access
	Arduino IDE	{getButton} $text={Download} $icon={download} $color={#007bff}

CIRCUIT DIAGRAM

Receiver Circuit:

Transmitter Circuit:

WIRING CONNECTIONS

NRF24L01 ↔ Arduino Nano

VCC	3.3V
GND	GND
CE	D9
CSN	D10
SCK	D13
MOSI	D11
MISO	D12

ADXL335 ↔ Arduino Nano

VCC	5V
GND	GND
X	A0
Y	A1
Z	A2

ARDUINO CODE

Transmitter Code

//Arduino Gesture Control Robot //Reciver Circuit //Created BY DIY Builder //You need to install the required libraries before uploading the code. //To install the libraries first download the library's zip file then go to sketch > include Library > ADD .ZIP File > Select the downloaded // libary's Zip file and you're done now. You can upload the the sketch now. // For more details you can contact me here www.instagram.com/diy.builder #include<SPI.h> #include<nRF24L01.h> #include<RF24.h> const int x_out = A0; const int y_out = A1; RF24 radio(8,10); const byte address[6] = "00001"; struct data{ int xAxis; int yAxis; }; data send_data; void setup() { // put your setup code here, to run once: radio.begin(); radio.openWritingPipe(address); radio.setPALevel(RF24_PA_MIN); radio.setDataRate(RF24_250KBPS); radio.stopListening(); } void loop() { // put your main code here, to run repeatedly: send_data.xAxis = analogRead(x_out); send_data.yAxis = analogRead(y_out); radio.write(&send_data, sizeof(data)); }

Receiver Code

//Arduino Gesture Control Robot //Reciver Circuit //Created BY DIY Builder //You need to install the required libraries before uploading the code. //To install the libraries first download the library from here https://github.com/nRF24/RF24 then go to sketch > include Library > ADD .ZIP File > Select the downloaded // libary's Zip file and you're done now. You can upload the the sketch now. // For more details you can contact me here www.instagram.com/diy.builder #include<SPI.h> #include<nRF24L01.h> #include<RF24.h> int ENA = 3; int ENB = 9; int MotorA1 = 4; int MotorA2 = 5; int MotorB1 = 6; int MotorB2 = 7; RF24 radio(8, 10); const byte address[6] = "00001"; struct data { int xAxis; int yAxis; }; data receive_data; void setup() { // put your setup code here, to run once: Serial.begin(9600); radio.begin(); radio.openReadingPipe(0,address); radio.setPALevel(RF24_PA_MIN); radio.setDataRate(RF24_250KBPS); radio.startListening(); pinMode(ENA, OUTPUT); pinMode(ENB, OUTPUT); pinMode(MotorA1, OUTPUT); pinMode(MotorA2, OUTPUT); pinMode(MotorB1, OUTPUT); pinMode(MotorB2, OUTPUT); } void loop() { // put your main code here, to run repeatedly while(radio.available()) { radio.read(&receive_data, sizeof(data)); if(receive_data.yAxis > 400) { digitalWrite(MotorA1, LOW); digitalWrite(MotorA2, HIGH); digitalWrite(MotorB1, HIGH); digitalWrite(MotorB2, LOW); analogWrite(ENA, 150); analogWrite(ENB, 150); }else if(receive_data.yAxis < 320) { digitalWrite(MotorA1, HIGH); digitalWrite(MotorA2, LOW); digitalWrite(MotorB1, LOW); digitalWrite(MotorB2, HIGH); analogWrite(ENA, 150); analogWrite(ENB, 150); } else if(receive_data.xAxis < 320){ digitalWrite(MotorA1, HIGH); digitalWrite(MotorA2, LOW); digitalWrite(MotorB1, HIGH); digitalWrite(MotorB2, LOW); analogWrite(ENA, 150); analogWrite(ENB, 150); }else if(receive_data.xAxis > 400){ digitalWrite(MotorA1, LOW); digitalWrite(MotorA2, HIGH); digitalWrite(MotorB1, LOW); digitalWrite(MotorB2, HIGH); analogWrite(ENA, 150); analogWrite(ENB, 150); }else { digitalWrite(MotorA1, LOW); digitalWrite(MotorA2, LOW); digitalWrite(MotorB1, LOW); digitalWrite(MotorB2, LOW); analogWrite(ENA, 0); analogWrite(ENB, 0); } } }

WORKING PRINCIPLE

The accelerometer senses hand tilt and sends signals to Arduino Nano. NRF24L01 transmits this data wirelessly to another Arduino.

The receiver Arduino processes the data and controls motors using L298N driver to move the robot.

STEPS

1. Build transmitter circuit
2. Build receiver circuit
3. Upload codes
4. Power both systems
5. Control robot using hand gestures

TIPS

• Use capacitor with NRF module
• Ensure proper power supply
• Calibrate accelerometer

CONCLUSION

This gesture control robot is a great advanced project combining wireless communication and motion sensing.