Adafruit Feather nRF52840 Sense Board

Adafruit Feather nRF52840 Sense Board is an all-in-one Arduino-compatible and Bluetooth Low Energy (BLE) with built-in USB plus battery charge. This chip comes with Arduino IDE support and the user can program the nRF52840 chip directly to take full advantage of the Cortex-M4 processor. Since the API and peripherals are the same for nRF52832 and nRF52840, users can supercharge the older nRF52832 projects with the same exact code by recompilation. To communicate over BLE the Nordic SoftDevice radio stack can be called. The Feather nRF52840 sense board is also a BLE-friendly CircuitPython board that works best with disk drive access. This board incorporates the only BLE-plus-USB-native chip that has the memory to handle a running Python interpreter. The massive RAM and speedy Cortex M4F chip make this a good match.


  • ARM Cortex M4F (with HW floating point acceleration) running at 64MHz
  • 1MB flash and 256KB SRAM
  • Up to +8dBm output power
  • Native Open Source USB stack - pre-programmed with UF2 bootloader
  • BLE compatible 2.4GHz radio
  • FCC / IC / TELEC certified module
  • 21 GPIO, 6 x 12-bit ADC pins, up to 12 PWM outputs (3 PWM modules with 4 outputs each)
  • Pin #13 red LED for general purpose blinking
  • Blue LED for general purpose connection status
  • NeoPixel for colorful feedback
  • Power/enable pin
  • 4 mounting holes
  • Reset button
  • SWD debug pads on the bottom of PCB
  • Measures 51mm x 23mm x 7.2mm without headers soldered in
  • Feather weighs about 6 grams
  • RoHS 2 compliant
  • Works out of the box with all of Adafruit's FeatherWings (Even the UART-using ones like the GPS FeatherWing)
  • Supporting sensors surrounding the module helps in environmental and motion-sensing:
    • ST Micro series 9-DoF motion - LSM6DS33 Accel/Gyro and LIS3MDL magnetometer
    • APDS9960 proximity, light, color, and gesture sensor
    • PDM microphone sound sensor
    • SHT humidity
    • BMP280 temperature and barometric pressure/altitude


Published: 2020-04-23 | Updated: 2022-03-10