Adafruit Feather nRF52840 Express

TheAdafruit Feather Bluefruit Sensetakes the popularFeather nRF52840 Expressand adds a smorgasbord of sensors to make a great wireless sensor platform.

This Feather microcontroller comes with Bluetooth Low Energy andnative USB support featuring the nRF52840! This Feather is an all-in-one Arduino-compatible + Bluetooth Low Energy with built-in USB plus battery charging. With native USB it works great with CircuitPython, too.

Like the Feather nRF52840,this chip comes with Arduino IDE support you can program the nRF52840 chip directly to take full advantage of the Cortex-M4 processor, and then call into the Nordic SoftDevice radio stack when you need to communicate over BLE. Since the underlying API and peripherals are the same for the 832 and 840, you can supercharge your older nRF52832 projects with the same exact code, with a single recompile!

This Feather is also aBLE-friendly CircuitPython board! CircuitPython works best with disk drive access, and this is the only BLE-plus-USB-native chip that has the memory to handle running alittle Python interpreter. The massive RAM and speedy Cortex M4F chip makethis a good match. Make centrals or peripherals with the ease of CircuitPython.

FEATURES:

1. ARM Cortex M4F (with HW floating point acceleration) running at 64MH
2. 1MB flash and 256KB SRAM
3. Native Open Source USB stack pre-programmed with UF2 bootloader
4. Bluetooth Low Energy compatible 2.4GHz radio (Details available in thenRF52840product specification)
5. FCC / IC / TELEC certified module
6. Up to +8dBm output power
7. 1.7v to 3.3v operation with internal linear and DC/DC voltage regulators
8. 21 GPIO, 6 x 12-bit ADC pins, up to 12 PWM outputs (3 PWM modules with 4 outputs each)
9. Pin #3 red LED for general purpose blinking, NeoPixel for colourful feedback
10. Power/enable pin
11. Measures 2.00.90.28 (51x23x7.2mm) without headers soldered in
12. 6 grams
13. 4 mounting holes
14. Reset button
15. SWD connector for debugging
16. Works out of the box with all Adafruit FeatherWings (Even the UART-using ones like the GPS FeatherWing)

Package Includes:

1 x Adafruit Feather nRF52840 Express