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 (small button near USB port)
- 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 and ready to flash
Note: If already plugged in: Hold BOOT, press RST, release RST, then release BOOT
Step 2: Install Drivers (if needed)
CP210x USB to UART Bridge
Usually not needed - most systems have this driver built-in
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) in Radio Settings
- Give your node a unique name
- Set node type: Client for portable, Router for fixed location
- Optional: Set GPS coordinates for map visibility
Meshtastic Setup
- Device will reboot automatically after flashing
- Connect via Bluetooth using the Meshtastic app
- Set region to "US" (this enables 915 MHz)
- Set your Long Name and Short Name
- Choose role: Client, Router, or Router_Client
- Default channel works for connecting with local users
US Users: Set frequency/region to 915 MHz (US). This ensures compatibility with the NodakMesh network and other US mesh networks!
Tips & Notes
- This is the most popular beginner device - great community support
- Stock antenna is decent but upgradeable for better range
- Supports Li-Po battery direct connection
- OLED screen shows status and messages