USB840X, The Longest Range Open Source USB Dongle

USB840X is the longest range, open source, certified nRF52840 + SKY66112 USB dongle supporting Bluetooth 5, Thread, or Zigbee radio protocols. Range is over 4500 meters or 2.5 miles at 125 Kbps with 60% Fresnel zone clearance.


Dongle USB840X


USB840X is in market ready enclosure.  Upon completion of firmware and app development, you can begin marketing products.

A BlueNor BT840X Bluetooth 5, Thread, Zigbee module is the main component inside USB840X. BT840X is certified with +22.6 dBm maximum TX power.

The 64 MHz Cortex M4F MCU in nRF52 relays messages between a PC and any node in the mesh network. A CryptoCell 310 co-processor is embedded in BT840 Series modules. Secured messages can be decrypted and authenticated when relayed between a PC and Bluetooth SIG mesh.

A TAG connect cable TC2050-IDC-NL-050-ALL can be used to connect to nRF52DK to load your own bootloader with private key.

Dongles are preloaded with Nordic USB CDC ACM secure boot loader. It can be booted and firmware updated from a PC. 

Size: 52x21x21mm.


  • FCC: X8WBT840.

  • Industrial Canada: 4100A-BT840.

  • QDID: 108621

Availability: Production.

USB840X, The longest range (>4500 meters) Open Source USB Dongle for BLE 5, Thread, Zigbee
from 29.99

USB840X, the longest range USB Dongle, over 4500 meters (2.5 miles) at 125 Kbps, 60% Fresnel zone clearance.

FCC, IC Certified

$29.99 each at 1 pcs; $24.99 each at 10 pcs; $22.99 each at 100 pcs; $19.99 each at 1000 pcs.

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