{"title":"Adafruit Feather nRF52840 Express","handle":"adafruit-feather-nrf52840-express","url":"/products/adafruit-feather-nrf52840-express","description":"The Feather nRF52840 Express upgrades the nRF52 Bluefruit with the Nordic nRF52840 — featuring 1 MB flash, 256 KB SRAM, native USB, and Bluetooth Low Energy in a single chip. Native USB means no separate serial converter is needed; the chip handles CDC serial, and can also act as a HID keyboard, mouse, MIDI device, or disk drive.\n\nThe board supports both Arduino IDE and CircuitPython. With the UF2 bootloader pre-installed, you can drag and drop firmware files for either platform. The 2 MB QSPI flash provides file storage for CircuitPython scripts and libraries. The nRF52840 is code-compatible with nRF52832 projects — just recompile to take advantage of the upgraded hardware.\n\nKey Features\n\n\nnRF52840 Processor – ARM Cortex M4F at 64 MHz with hardware floating point acceleration\n\n1 MB Flash + 256 KB SRAM – 4× the resources of the nRF52832\n\nNative USB – CDC serial, HID keyboard/mouse, MIDI, and mass storage support\n\nBluetooth Low Energy – 2.4 GHz BLE radio with up to +8 dBm output power\n\nFCC / IC / TELEC Certified – Pre-certified wireless module\n\n2 MB QSPI Flash – File storage for CircuitPython code and libraries\n\nUF2 Bootloader – Drag-and-drop firmware loading for CircuitPython and Arduino\n\nArduino + CircuitPython – Full support for both development environments\n\nNeoPixel – On-board addressable RGB LED for status feedback\n\nUser Button – Extra button for OTA updates or custom functions\n\n21 GPIO Pins – 6× 12-bit ADC, up to 12 PWM outputs (3 modules × 4 channels)\n\nLiPo Battery Support – JST connector with built-in charger and battery voltage monitoring\n\nSWD Debug Connector – Standard 2×5 0.05\" header for advanced debugging\n\nFull FeatherWing Compatibility – Works with all FeatherWings including UART-based ones\n\nCompact Design – 51 mm × 23 mm × 7.2 mm, weighing 6 g\n\n\nAlso Available\n\n\nFeather nRF52840 Sense – Same board with on-board environmental and motion sensors\n\nFeather nRF52 Bluefruit LE – nRF52832 with Arduino support (no native USB)\n\nFeather nRF52 Pro – nRF52832 with Apache Mynewt RTOS\n\n\nIdeal For\n\nBLE projects with CircuitPython or Arduino\nUSB HID devices (keyboards, mice, MIDI controllers)\nWireless sensors and data logging\nPortable battery-powered Bluetooth projects\n\n\nPackage Contents\n\n1× Feather nRF52840 Express\n1× Header pin set\n\n\n\nNote: LiPo battery and USB cable sold separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":7494,"title":"Default Title","sku":"AF-4062","price":51.97,"on_sale":false,"in_stock":true,"available_quantity":47,"option1":"Default Title"}]}