NRF24L01+ Tester for Flipper Zero

A real-time SPI communication tester for NRF24L01+ modules on Flipper Zero, featuring hardware status monitoring and register reading capabilities.

Features

• Real-time monitoring of NRF24L01+ connection status
• Register reading (SETUP_AW) with live updates
• Hardware diagnostics for SPI communication
• Clean UI with visual connection indicators
• Safe thread handling with mutex protection

Hardware Requirements

• Flipper Zero
• NRF24L01+ module (3.3V version)
• Breadboard and jumper wires

Wiring Diagram

NRF24L01+ Pin	Flipper Zero Pin
GND	GND
VCC	3.3V
CE	PA6
CSN	PC3
SCK	PA4
MOSI	PA7
MISO	PA5
IRQ	Not connected

Setup

1. Clone the repository:

   git clone https://github.com/CyberDemon73/flipperzero-nrf24monitor.git
   cd flipperzero-nrf24monitor
   

2. Build and deploy:

   ./fbt launch_app APPSRC=applications_user/flipperzero-nrf24monitor
   

Installation

You can download the fap file directly from the repo and put it on the flipper through Qflipper desktop application.

Usage

1. Launch the app from Flipper Zero's application menu
2. View real-time connection status:
   • Green ○ + = Connected
   • Red ○ - = Disconnected
3. Monitor SETUP_AW register value
4. Press OK to exit

UI Overview

┌──────────────────────────────┐
│       NRF24L01+ Monitor      │
├──────────────────────────────┤
│  ○ +    CONNECTED            │
│                              │
│  ╭────────────────────────╮  │
│  │ SETUP_AW:        0x03  │  │
│  ╰────────────────────────╯  │
├──────────────────────────────┤
│         [ OK to Exit ]       │
└──────────────────────────────┘

Real Example

Connected

Disconnected

Technical Details

• SPI Interface: External bus at 8MHz
• Update Rate: 100ms
• Tested Register: SETUP_AW (0x03)
• Thread Safety: Mutex-protected data access

Troubleshooting

Symptom	Solution
"NO SIGNAL" status	Check power (3.3V only)
Register shows 0xFF	Verify SPI wiring
Register shows 0x00	Check CE/CSN connections
App crashes	Ensure proper mutex handling

License

MIT License - See LICENSE for details

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Contributions welcome! Please submit issues or PRs for improvements.