{"title":"Adafruit CLUE - nRF52840 Express with Bluetooth LE","handle":"adafruit-clue-nrf52840-express-with-bluetooth-le-alpha","url":"/products/adafruit-clue-nrf52840-express-with-bluetooth-le-alpha","description":"The Adafruit CLUE is a sensor-packed development board built around the Nordic nRF52840 with Bluetooth Low Energy. It matches the BBC micro:bit form factor and edge-connector pinout, making it compatible with existing micro:bit robot kits and add-ons.\n\nPacked with on-board sensors and a 1.3\" colour display, the CLUE is designed for projects that measure, log, and visualise environmental data — all without any external wiring. Data can be transmitted over BLE to a computer or mobile device, or saved to the built-in 2MB flash storage.\n\nKey Features\n\n\nNordic nRF52840 – 64 MHz Cortex-M4, 1MB Flash, 256KB RAM, Bluetooth Low Energy\n\n1.3\" 240×240 Colour IPS TFT Display – High-resolution text and graphics\n\n9-DoF Motion – LSM6DS33 accelerometer/gyroscope + LIS3MDL magnetometer\n\nAPDS9960 – Proximity, light, colour, and gesture sensor\n\nPDM Microphone – Sound sensing and recording\n\nSHT Humidity Sensor – Relative humidity measurement\n\nBMP280 – Barometric pressure and temperature\n\nRGB NeoPixel – Status indicator LED\n\nBuzzer/Speaker – Tones and audio feedback\n\nTwo White LEDs – Front illumination for colour sensing\n\n2MB Internal Flash – For datalogging, images, fonts, or CircuitPython code\n\nSTEMMA QT / Qwiic Connector – Add more I2C sensors, displays, or motor controllers\n\nTwo A/B User Buttons – Plus a reset button\n\n3–6V Battery Input – Internal regulator and protection diodes\n\nmicro:bit Form Factor – Same outline and edge-connector for compatibility with micro:bit accessories\n\n\nProgramming\n\nArduino IDE\nCircuitPython\n\n\n\nNote: MakeCode and Scratch are not currently supported on the nRF52840 chipset. While the CLUE matches the micro:bit outline, most micro:bit cases will not fit, and micro:bit code may require adjustment.\n\n\nIdeal For\n\nEnvironmental sensing and datalogging projects\nWearable BLE projects with on-board display\nUpgrading micro:bit robot kits with advanced sensors\nLearning CircuitPython with built-in peripherals\n\n\nPackage Contents\n\n1× Adafruit CLUE nRF52840 Express (Alpha)\n","vendor":"Adafruit","product_type":"physical","in_stock":false,"options":[],"variants":[{"id":4480,"title":"Default Title","sku":"AF-4500","price":75.0,"compare_at_price":0.0,"on_sale":false,"in_stock":false,"available_quantity":0,"option1":"Default Title"}]}