BT840, Low Cost nRF52840 Bluetooth 5, Thread, Zigbee Module




BT840 is an advanced, highly flexible solution for today's increasingly demanding Ultra Low Power, Ultra Long Range, and higher throughput applications in the IoT world. Inherent industry-grade security is essential in today's applications, a cryptographic accelerator is embedded.

BT840 is a lower cost, $6.88 at 1 pcs, smaller size, shorter range alternative of BT840F. Both have identical soldering pad footprints. 

Sister module BT840E has an u.FL connector for external connector.

For a brief description of Bluetooth mesh and its requirements for security, please go to webpage BT840F.

BT840 Advanced Features


  • Bluetooth 5 datarate: 2Mbps, 1Mbps, 500 Kbps, 125 kbps

  • IEEE 802.15.4 Thread and Zigbee

  • ANT/ANT+

  • Nordic 2.4 GHz proprietary

Power Supply

  • 1.7V to 3.6V DC power supply

  • High voltage power supply to accept up to 5.5V DC for direct connection to Lithium batteries or 5V system power. An external voltage regulator is not required. Your total system cost can be lower and your PCB size can be smaller.


  • Embedded CryptoCell 310 co-processor can be used to provide more secure connection and to prevent hacker.

  • BT840 is required if your Bluetooth 5 devices are used in mesh networks with many nodes for desirable performance. Security is mandatory in Bluetooth mesh networks. By offloading decryption, encryption, and authentication works to CryptoCell-310, BT840 can deliver high performance in Bluetooth mesh networks.

BT840 Specifications

  • Nordic nRF52840 QIAA with ARM Cortex M4F

  • ARM CryptoCell-310 cryptographic co-processor

  • 1MB flash, 256 KB RAM

  • Complete RF solution with integrated antenna

  • Bluetooth range: 100 meters at 1Mbps; 230 meters at 125 Kbps.

  • Multiple protocols: BLE, ANT, Thread, Zigbee

  • NFC-A tag interface for Out Of Band pairing

  • 128-bit AES HW encryption

  • Serial Wire Debug (SWD)

  • Nordic SoftDevice Ready

  • Over-The-Air (OTA) firmware update

48 GPIOs, firmware configurable, Peripherals

  • 12 bit/200KSps ADC

  • 3x SPI Master/Slave, 8 Mbps

  • 2x 2-wireMaster/Slave, I2C compatible

  • UART

  • Quadrature Demodulator (QDEC)

  • I2S audio interface

  • Digital microphone interface

  • Peripherals: Temperature sensor, general comparator, Low power comparator, Random Number Generator

  • 20 channel CPU independent Programmable Peripheral Interconnect (PPI)

  • 5 x 32 bits, 3 x 24 bits Real Time Counters (RTC)


  • Operation voltage: 1.7V to 5.5V


  • Operation Temperature: -40°C to +85°C

  • Integrated shield to resist EMI

  • Sizes: 14.0x16.0x1.9mm

  • Availability: Production

Certifications for Bluetooth and 802.15.4

  • FCC ID: X8WBT840F

  • IC (Industrial Canada) ID: 4100A-BT840F

  • Europe: certified

  • Australia and New Zealand: RCM certified

  • Japan: 201-190710/00

  • QDID: 108621

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For volume discount and production lead time, please email Fanstel

BT840 nRF52840 Bluetooth 5 module
6.88 11.19

BT840 low cost, nRF52840 Bluetooth 5 module

Special price: $6.88 each at 1 pcs.

$6.46 each for 1000-reel

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EV-BT840, Evaluation board for BT840

EV BT840 has the same footprint as Arduino UNO R3. It is not an Arduino compatible board. You need Nordic development tools for firmware development. 

Most of Arduino UNO R3 shields can be used with EV BT840. You can take advantage of Bluetooth 5 advanced features when used with Arduino shields.

A single order is preloaded with SLAVE firmware for used with Nordic nRF connect.


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