IMPORTANT: Attach Antenna Before Powering On!
Always connect an antenna to your device BEFORE plugging in USB or turning it on. Transmitting without an antenna can permanently damage the LoRa radio chip. Even a few seconds of transmission without an antenna can cause irreversible damage. This applies to flashing AND normal use.
Step 1: Enter DFU/Bootloader Mode
Method: Boot Button
- 1 Unplug the device from USB
- 2 Press and hold the BOOT button
- 3 While holding BOOT, plug in the USB cable
- 4 Release the BOOT button after 1-2 seconds
- 5 Device is now in DFU mode
Note: If already plugged in: Hold BOOT, press RST, release RST, then release BOOT
Step 2: Install Drivers (if needed)
CH340 USB to Serial
REQUIRED on Windows - device will NOT be recognized without it
Step 3: Flash Firmware
Open the web flasher for your chosen firmware in Chrome or Edge browser:
Step 4: Post-Flash Configuration
MeshCore Setup
- Device will reboot automatically after flashing
- Connect via Bluetooth using the MeshCore app
- Set frequency to 915 MHz (US)
- Configure TX power (up to 28dBm supported)
- Set node name and type
Meshtastic Setup
- Device will reboot automatically after flashing
- Connect via Bluetooth using the Meshtastic app
- Set region to "US"
- Configure your node name
- Higher TX power available in LoRa settings
US Users: Set frequency/region to 915 MHz (US). This ensures compatibility with the NodakMesh network and other US mesh networks!
Tips & Notes
- Windows users: Install CH340 driver BEFORE connecting device
- 28dBm high power output - great for long range
- Solar panel interface built-in
- If device not recognized, check Device Manager for unknown USB device