BT840F, Nordic nRF52840 Bluetooth 5 Module Secure IoT, Ultra Long Range, IEEE 802.15.4




Bluetooth 5 Specifications

Three key features of Bluetooth 5 specifications:

  1. 2X bandwidth to support 2Mbps data rate.
  2. 4X range to provide coverage of an entire home or building.
  3. 8X broadcasting message length from 31 bytes to 255 bytes.

Nordic nRF52832 SoC supports 2 Mbps data rate and firmware upgrade with new SoftDevices can transmit broadcasting messages up to 255 bytes long. All BlueNor modules, BC832, BT832, BT832F, and BT832X supports these two Bluetooth 5 specifications.

Bluetooth SIG CORE_v5.0 LE CODED PHY uses FEC (Forward Error Correction) codes, 8 or 2 symbols to represent 1 data bit, and 1 M Symbols per second (MSps) transmission rate. Effectively, the maximum data rate is 125 kbps when 8 symbols are used. This FEC coding allows receivers to receive much weaker signals and to increase range by 4 times.

Range of typical BLE 4.2 modules is about 50 meters. This CODED-PHY can quadruple the range to about 200 meters at reduced data rate of 125 kbps. BlueNor BT832F uses a superior PCB trace antenna to increase Bluetooth range to 220/330 meters between 2 modules.

If you are developing a product meeting Bluetooth 5 specifications, BT832F is a better choice. It offers

  • the same 4X range,  220/330 meters, enough coverage for a house or building
  • the same data rate at 1Mbps, not at the reduced 125 kbps
  • low peak current, 7.5 mA at +4 dBm transmission
  • lower cost, $5.22 each at 1K pcs. 

BT840F, much more than a bluetooth 5 module

BT840F is a great choice if your product needs the following features:

  • More than 200 meters range. With +9 dBm TX and CODED PHY, BT840F range can be similar to other ultra long range modules with power amplifier at much higher peak current consumption.
  • More memories (1MB flash/256KB RAM)
  • Supports of IEEE 802.15.4, Thread and Zigbee
  • More GPIOs (48)
  • Secure data transmission
  • Hacking prevention

Security for connected iot products

Security is a paramount consideration for the design of connectable IoT devices. A truly secure application must be designed from the ground up. An ARM CryptoCell-310 cryptographic co-processor is embedded in nRF52840. CryptoCell-310 provides the following key features:

  • Cryptographic hardware engines, providing CPU host offloading, operation acceleration and power consumption reduction.
  • Cryptography and security middleware services
  • Platform Security building blocks libraries
  • Device Life-Cycle-State management
  • Key Management infrastructure
  • Secure Boot.

Secured IoT products can be developed using BT840F.

Upgradeable Features and reducible cost

BT840F is designed to have the exactly physical size of BT832F, an nRF52832 module. Except 19 pins in solid black round dots, both modules are hardware pin to pin. Different firmware is required to configure and to implement different features.

Comparing to BT832F, BT840F has more flash memories and RAM, GPIOs, higher RF transmit power for longer Bluetooth range, and an ARM CryptoCell-310 cryptographic co-processor to implement secure IoT. When none of these is required, a BT832F can be used instead to reduce cost. If shorter Bluetooth range is acceptable, BT832 can be used for the lowest cost. In your hardware design, be sure to avoid bare metal contact in the additional pin area of BT840F to prevent shorting.

BT840F,  Bluetooth 5 module 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
  • 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
  • Bluetooth Line of Sight Range: 350 meters, estimated
  • Sizes: 15.0x20.8x1.9mm
  • Availability: Engineering samples available in March 2017


  • FCC ID: 
  • IC (Industrial Canada) ID:
  • Europe:

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BT840F, Bluetooth 5 module, secure IoT, ultra long range, IEEE 802.15.4 (Thread and Zigbee)

BT840F, BLE 5 module for secure IoT.

BT840 engineering samples made with Nordic nRF52840 engineering samples will be available for shipping in late Feb to early March.

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EV-BT840F, Evaluation board for BT840F

Evaluation board for BT840F, Bluetooth 5 module for secure IoT

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