{"title":"Adafruit Feather nRF52 Pro with myNewt Bootloader","handle":"adafruit-feather-nrf52-pro-with-mynewt-bootloader","url":"/products/adafruit-feather-nrf52-pro-with-mynewt-bootloader","description":"The Feather nRF52 Pro is an advanced Bluetooth Low Energy development board built around the Nordic nRF52832, designed specifically for use with the Apache Mynewt RTOS. It features a fully open-source BLE 5.0 stack, a serial bootloader for command-line firmware flashing, and an on-board SWD debug connector for professional development workflows.\n\nApache Mynewt provides professionally written networking stacks (BLE 5.0, OIC/OCF), a secure bootloader with cryptographic firmware signing, and comprehensive project management tools — all under the permissive Apache licence. The board supports UART-based BLE data transfer and custom GATT services.\n\n\nImportant: This board is for advanced users only. It uses the Apache Mynewt RTOS, not Arduino IDE. You cannot easily switch between Mynewt and Arduino without an SWD programmer. If you want Arduino IDE support, use the Feather nRF52 Bluefruit LE instead.\n\n\nKey Features\n\n\nnRF52832 Processor – ARM Cortex M4F at 64 MHz with hardware floating point acceleration\n\n512 KB Flash + 64 KB SRAM – Twice the memory of nRF51-based modules\n\nBluetooth Low Energy 5.0 – Fully open-source BLE stack via Apache Mynewt\n\nFCC / IC / TELEC Certified – Pre-certified wireless module\n\nApache Mynewt RTOS – Professional RTOS with secure bootloader, OTA updates, and cryptographic firmware signing\n\nMynewt Serial Bootloader – Flash firmware via USB Serial using the newtmgr command-line tool\n\nSWD Debug Connector – On-board connector for Segger J-Link or CMSIS-DAP debugging\n\nDFU Button – Dedicated button for device firmware update mode\n\nUp to +4 dBm Output – BLE radio power\n\n19 GPIO Pins – 8× 12-bit ADC, up to 12 PWM outputs (3 modules × 4 channels)\n\nBuilt-in USB Serial – For programming and debugging via command line\n\nLiPo Battery Support – JST connector with built-in charger and battery voltage monitoring\n\nCompact Design – 51 mm × 23 mm × 8 mm, weighing 5.7 g\n\n\n\nNote: Mynewt development tools require a POSIX-type system (Linux, macOS, or MinGW). Windows users can use the Docker container available on the Mynewt website.\n\n\nAlso Available\n\n\nFeather nRF52 Bluefruit LE – Same hardware with Arduino IDE support\n\nFeather nRF52840 Express – Upgraded nRF52840 with USB native, 1 MB flash, CircuitPython\n\nFeather nRF52840 Sense – nRF52840 with on-board sensors\n\n\nIdeal For\n\nAdvanced BLE 5.0 development with open-source stack\nProfessional IoT projects requiring secure bootloading\nApache Mynewt RTOS-based applications\nProjects needing SWD debugging capabilities\n\n\nPackage Contents\n\n1× Feather nRF52 Pro with Mynewt Bootloader\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":3022,"title":"Default Title","sku":"AF-3574","price":53.65,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}