A lightweight Arduino-based 2.4GHz Channel Sweeper designed for RF testing, interference analysis, and channel activity verification using the nRF24L01 module.
This project cycles through all 2.4GHz ISM band channels (0–78) and includes BLE advertising channels (37, 38, 39) while transmitting a constant carrier wave.
Useful for lab environments, RF performance testing, or verifying signal presence on specific channels.
| nRF24L01 Pin | Arduino Uno Pin | Notes |
|---|---|---|
| VCC | 3.3V | Use stable 3.3V regulator; add 10uF–100uF decoupling capacitor if module unstable |
| GND | GND | Common ground required |
| CE | D9 | Configurable in sketch (PIN_RF24_CE) |
| CSN | D10 | Configurable in sketch (PIN_RF24_CSN) |
| SCK | D13 | SPI SCK |
| MOSI | D11 | SPI MOSI |
| MISO | D12 | SPI MISO |
| IRQ | (optional) | Not used by this sketch |
- Arduino IDE (v1.8.5 or newer)
- RF24 Library by TMRh20
→ https://github.com/tmrh20/RF24
- Open Arduino IDE
- Go to
Sketch → Include Library → Manage Libraries... - Search for RF24 and install by TMRh20
- Connect your nRF24L01 module as per the table above.
- Open
.inoin Arduino IDE. - Select Arduino Uno board and correct COM port.
- Upload the sketch.
- Open Serial Monitor at
115200 baudto view status logs.
- Frequency Band: 2.400 GHz – 2.4835 GHz
- Total Channels: 79
- BLE Channels Covered: 37 (2402 MHz), 38 (2426 MHz), 39 (2480 MHz)
- Data Rate: 2 Mbps
- Power Level: Maximum (
RF24_PA_MAX) - Mode: Constant carrier transmit
Take your skills to the next level with Bluetooth Hacking and Security MasterClass, a hands-on, lab-driven Udemy course tailored for red-teamers, penetration testers, security researchers, and hardware security enthusiasts.
Course title: Bluetooth Hacking and Security MasterClass
Description: Master practical Bluetooth offensive and defensive skills with this hands-on, lab-driven course designed for red-teamers, penetration testers, security researchers, and hardware security enthusiasts. You’ll move from clear foundational theory into realistic, mission-oriented exercises that mirror real engagement workflows: recon → weaponized → execute → document → remediate.
Bluetooth Hacking & Security MasterClass
This project is intended strictly for educational and laboratory use.
Unauthorized transmission or interference with public communication channels may violate local telecommunication regulations.
- Use only in controlled RF environments (e.g., shielded rooms, test enclosures).
- The authors and contributors are not responsible for misuse or illegal application of this code.
- Always ensure compliance with your country’s RF transmission laws.
- Perform testing at low output power when possible.
- Ensure proper decoupling capacitor near the nRF24L01 module for stable operation.
- The sketch utilizes recursive channel sweeping for smoother frequency transitions.
This project is released under the MIT License.
See LICENSE for details.
