NRF24L01 Remote Control LED

In this tutorial we will explore Wireless Communication and learn how to control an LED with a button the NRF24L01 modules and arduino.

Watch the video!

Step 1: What You Will Need

• 2X Arduino UNO (or any other Arduino)
• Button
• 2X nrf24l01 module
• LED
• 1k ohm resistor
• Jumper wires
• Breadboard
• Visuino program: Download Visuino

Step 2: Brought by PCBWay

Thank you PCBWay for supporting this tutorial and helping users learn more about electronics.

What I like about the PCBWay is that you can get 10 boards for approximately $5 which is really cost effective for professional made boards, not to mention how much time you save!

Go check them out here. They also offer a lot of other stuff in case you might need it like assembly, 3D printing, CNC machining and a lot more.

Step 3: The Circuit

Step 4: Start Visuino, and Select the Arduino UNO Board Type

The Visuino: https://www.visuino.com also needs to be installed. Download Free version or register for a Free Trial.

Start Visuino as shown in the first picture Click on the “Tools” button on the Arduino component (Picture 1) in Visuino When the dialog appears, select “Arduino UNO” as shown on Picture 2

Step 5: For Sender Arduino – in Visuino Add, Set & Connect Components

• Add “Debounce Button” component
• Add “Toggle(T) Flip-Flop” component
• Add “Pulse Generator” component
• Add “Make Structure” component
• Add “NRF24L01 Wireless” component

Note: we are adding Pulse generator to prevent packets getting lost

• Select “PulseGenerator1” and in the properties window set “Frequency” to 10
• Double click on the “MakeStructure1” and in the “Elements” window drag 2X “Digital” to the Left side
• Close the “Elements” window

• Connect Arduino digital pin [2] to “Button1” pin [In]
• Connect “Button1” pin [Out] to “TFlipFlop1” pin [Clock]
• Connect “TFlipFlop1” pin [Out] to “MakeStructure1” > “Digital1” pin [In]
• Connect “PulseGenerator1” pin [Out] to “MakeStructure1” > “Digital2” pin [In]
• Connect “MakeStructure1” pin [Out] to “NRF24L011” pin [In]
• Connect “NRF24L011” pin Interface [SPI] To Arduino board pin [SPI]
• Connect “NRF24L011” pin [Chip Select] To Arduino board digital pin [10]
• Connect “NRF24L011” pin [Chip Enable] To Arduino board digital pin [9]

Upload the Project to the Arduino Board (see the Generate, Compile, and Upload the Arduino Code step)

Step 6: For Receiver Arduino – in Visuino Add, Set & Connect Components

Step 7: Generate, Compile, and Upload the Arduino Code

In Visuino, at the bottom click on the “Build” Tab, make sure the correct port is selected, then click on the “Compile/Build and Upload” button.

Step 8: Play