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@ -48,9 +48,13 @@ cd esp32_bluetooth_classic_sniffer
Before starting to use *BrakTooth* Sniffer, you need to upload a custom firmware to your ESP32 board:
```bash
sudo chown $USER:$USER /dev/ttyUSB0 # Give user permission to serial port to avoid using sudo
./firmware.py flash /dev/ttyUSB0 # Change ttyUSB0 to match your port name
# Note: ESP-WROVER-KIT or ESP-ETHERNET-KIT uses /dev/ttyUSB1 instead as the first port is for the FTDI JTAG circuit.
```
**Important: Some boards requires you to hold the BOOT button to properly put ESP32 into flashing mode.**
### 2) Usage Instructions
```bash