{"product_id":"adafruit-feather-nrf52840-express","title":"Adafruit Feather nRF52840 Express","description":"\u003cmeta name=\"description\" content=\"Buy Adafruit Feather nRF52840 Express online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003eAdafruit Feather nRF52840 Express\u003c\/h1\u003e\n\n\u003cp\u003eThe Adafruit Feather nRF52840 Express is a compact, powerful microcontroller board featuring the Nordic nRF52840 SoC with integrated Bluetooth 5.0 and NFC capabilities, designed for IoT, wearable, and wireless embedded applications. Professional developers and embedded systems engineers use this board to rapidly prototype wireless solutions requiring low-power operation, high processing capability, and seamless connectivity in resource-constrained environments. This board solves the critical challenge of combining advanced wireless communication with a small form factor, eliminating the need for external wireless modules while maintaining ultra-low power consumption ideal for battery-powered devices.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Adafruit Feather nRF52840 Express operates on the ARM Cortex-M4F processor running at 64 MHz with 1 MB of Flash memory and 256 KB of RAM, providing sufficient computational resources for complex signal processing and data handling tasks. The Nordic nRF52840 chipset integrates a 2.4 GHz radio supporting Bluetooth 5.0 (BLE), ANT+, and proprietary protocols, alongside NFC Type 2 tag functionality for proximity-based communication. The board features a built-in lithium-ion battery charging circuit, making it ideal for portable applications requiring autonomous operation. Power consumption can be reduced to microampere levels in sleep mode through intelligent peripheral management and clock gating.\u003c\/p\u003e\n\n\u003cp\u003eWhat distinguishes the nRF52840 Express from competing solutions is its exceptional integration density and software maturity. The board comes pre-loaded with the Adafruit bootloader and supports both Arduino IDE and CircuitPython environments, significantly reducing development time. The 21 GPIO pins, including analog inputs, PWM outputs, and I2C\/SPI interfaces, provide extensive connectivity options for sensor integration and peripheral control. The onboard RGB LED and user button enable rapid feedback mechanisms during development, while the USB-C connector supports both programming and power delivery at up to 500 mA.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 Microcontroller Development Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAdafruit Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 days on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping\u003c\/td\u003e\n\u003ctd\u003e1-5 days from Bengaluru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003e7-8 days across India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e24\/7 via Email and WhatsApp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003eARM Cortex-M4F @ 64 MHz with FPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory\u003c\/td\u003e\n\u003ctd\u003e1 MB Flash, 256 KB RAM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 LE, ANT+, NFC Type 2 Tag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPIO Pins\u003c\/td\u003e\n\u003ctd\u003e21 digital I\/O with PWM, ADC, I2C, SPI support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Input\u003c\/td\u003e\n\u003ctd\u003eUSB-C (5V) or LiPo Battery (3.7V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V logic with 5V tolerant inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw\u003c\/td\u003e\n\u003ctd\u003e5 mA active, 2 µA sleep mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e50.8 x 22.9 mm (Feather form factor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNordic nRF52840 SoC with dual-core architecture supporting concurrent Bluetooth 5.0 and NFC operations for multi-protocol wireless applications\u003c\/li\u003e\n\u003cli\u003eIntegrated lithium-ion battery charging circuit with USB Power Delivery support, eliminating the need for external charging modules in portable designs\u003c\/li\u003e\n\u003cli\u003e21 GPIO pins with configurable functionality including analog-to-digital converters (12-bit), PWM outputs, and dual SPI\/I2C interfaces for extensive sensor connectivity\u003c\/li\u003e\n\u003cli\u003ePre-loaded Adafruit UF2 bootloader enabling drag-and-drop programming without external tools, accelerating development cycles\u003c\/li\u003e\n\u003cli\u003eDual programming environments: Arduino IDE with C\/C++ support and CircuitPython for rapid prototyping and educational applications\u003c\/li\u003e\n\u003cli\u003eUltra-low power consumption with configurable sleep states and peripheral power gating, extending battery life to months in idle applications\u003c\/li\u003e\n\u003cli\u003eBuilt-in RGB LED and user button for real-time debugging and user interface implementation without additional components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWearable health monitoring devices: Heart rate sensors, accelerometers, and temperature sensors connected via BLE to mobile applications for real-time health tracking and data logging\u003c\/li\u003e\n\u003cli\u003eIoT environmental monitoring: Wireless sensor networks for temperature, humidity, and air quality measurement in smart buildings with extended battery operation through low-power protocols\u003c\/li\u003e\n\u003cli\u003eProximity-based access control: NFC tag implementation for door locks, payment systems, and asset tracking with simultaneous Bluetooth connectivity for authentication\u003c\/li\u003e\n\u003cli\u003eWireless robotics and drone controllers: Real-time motor control and sensor feedback over Bluetooth 5.0 with sufficient processing power for advanced algorithms and machine learning inference\u003c\/li\u003e\n\u003cli\u003eHome automation hubs and gateways: Centralized control of multiple wireless devices with support for mesh networking and protocol bridging between proprietary and standard protocols\u003c\/li\u003e\n\u003cli\u003eMedical device prototyping: FDA-compliant wireless communication for patient monitoring systems with secure BLE encryption and deterministic real-time performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003cp\u003eBegin by connecting the Adafruit Feather nRF52840 Express to your computer via USB-C cable. The board will appear as a USB mass storage device with the UF2 bootloader active. Install the Arduino IDE or CircuitPython environment on your development machine. For Arduino users, add the Adafruit nRF52 board package through the Boards Manager, then select the Feather nRF52840 Express from the board dropdown. For CircuitPython users, download the latest firmware from adafruit.com, drag the UF2 file to the FEATHERBOOT drive, and the board will automatically reboot with CircuitPython loaded.\u003c\/p\u003e\n\n\u003cp\u003eTo establish Bluetooth connectivity, use the ArduinoBLE library for Arduino or the adafruit_ble library for CircuitPython. Configure your device as a peripheral or central depending on your application requirements. The board supports standard BLE GATT profiles for common use cases like heart rate monitoring and environmental sensing, or custom profiles for proprietary applications. For NFC functionality, utilize the Adafruit PN532 library or native NFC APIs to read\/write Type 2 tags. Always implement proper power management by configuring sleep modes and peripheral clock gating to achieve microampere-level current draw during idle periods. Use the onboard RGB LED for status indication and the user button for mode selection or reset functionality.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum Bluetooth 5.0 range achievable with the nRF52840 Express?\u003c\/summary\u003e\n\u003cp\u003eThe theoretical maximum range under optimal conditions is approximately 240 meters in open space with line-of-sight communication. However, practical range typically varies between 30-100 meters depending on antenna orientation, environmental obstacles, and transmit power settings. The nRF52840 supports adjustable TX power from -40 dBm to +8 dBm, allowing you to optimize range versus power consumption based on your application requirements. In indoor environments with walls and interference, expect effective ranges of 10-50 meters.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use both Bluetooth and NFC simultaneously on this board?\u003c\/summary\u003e\n\u003cp\u003eYes, the nRF52840 SoC includes independent radio subsystems for Bluetooth 5.0 and NFC, allowing concurrent operation. However, both radios operate on the 2.4 GHz frequency band, so simultaneous transmission on both protocols is not possible due to RF front-end sharing. The radio arbitration is handled automatically by the SoftDevice firmware, prioritizing Bluetooth communication while allowing NFC tag detection during idle periods. For applications requiring simultaneous full-duplex operation, implement time-division multiplexing or use external NFC modules.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the battery life expectancy for a typical BLE application?\u003c\/summary\u003e\n\u003cp\u003eBattery life depends on connection interval, payload size, and transmit power. A typical configuration with 100 ms connection interval, 20-byte payloads, and -8 dBm TX power can achieve 6-12 months of operation on a 500 mAh LiPo battery. Disconnected advertising consumes approximately 50 µA, while active connected mode draws 5-10 mA depending on radio activity. Implementing sleep modes and reducing connection frequency can extend battery life to 18-24 months. Use the Adafruit Power Profiler Kit to measure actual current consumption for your specific application.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the nRF52840 Express compatible with Arduino libraries?\u003c\/summary\u003e\n\u003cp\u003eYes, the board is fully compatible with Arduino IDE through the Adafruit nRF52 board package. Most standard Arduino libraries for sensors, displays, and communication protocols work seamlessly. However, some libraries with strict ARM Cortex-M3 assumptions may require minor modifications. The Adafruit ecosystem provides optimized libraries for BLE, NFC, and power management specifically designed for the nRF52840. CircuitPython users benefit from the extensive Adafruit CircuitPython library collection with identical functionality.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eOrders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return and warranty policy?\u003c\/summary\u003e\n\u003cp\u003eWe offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eWhy Buy from The Engineer Store\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Products: Sourced directly from authorized distributors with authentication\u003c\/li\u003e\n\u003cli\u003eExpert Team: Our technical team validates every product before listing\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003ePan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata\u003c\/li\u003e\n\u003cli\u003ePayment Options: COD, UPI, credit\/debit cards, net banking, EMI available\u003c\/li\u003e\n\u003cli\u003eTechnical Support: 24\/7 expert guidance via email and WhatsApp\u003c\/li\u003e\n\u003cli\u003eReturns: 7-day return policy on manufacturing defects only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuy Adafruit Feather nRF52840 Express Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eAdafruit Feather nRF52840 Express\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e, India's trusted source for genuine electronics. We deliver\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43847439450275,"sku":"TES-EV00006034","price":3177.88,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/4062-02-314x252.jpg?v=1703853640","url":"https:\/\/www.theengineerstore.in\/zh-hans\/products\/adafruit-feather-nrf52840-express","provider":"The Engineer Store","version":"1.0","type":"link"}