Adafruit ItsyBitsy nRF52840 Express by Kattni Rembor published January 18, 2020, last edited January 22, 2025 posted in Adafruit Products Microcontrollers Internet of Things - IOT/ Bluefruit / BLE Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Download Overview Update Bootloader Use UF2 Use Arduino IDE Use Command Line Pinouts Arduino Support Setup Arduino Examples Arduino Bluefruit nRF52 API nRF52 ADC FAQs What is CircuitPython? CircuitPython for ItsyBitsy nRF52840 Express Installing the Mu Editor Creating and Editing Code Connecting to the Serial Console Interacting with the Serial Console The REPL CircuitPython Libraries Frequently Asked Questions Welcome to the Community! Advanced Serial Console on Windows Advanced Serial Console on Mac "Uninstalling" CircuitPython Troubleshooting Getting Started with BLE and CircuitPython CircuitPython Essentials CircuitPython Pins and Modules CircuitPython Built-Ins CircuitPython Digital In & Out CircuitPython Analog In CircuitPython Analog Out CircuitPython PWM CircuitPython Servo CircuitPython Internal RGB LED CircuitPython NeoPixel CircuitPython DotStar CircuitPython UART Serial CircuitPython I2C CircuitPython HID Keyboard and Mouse CircuitPython Storage CircuitPython CPU Temp CircuitPython Expectations Software Resources Using nRF52840 SPI on Battery Power Downloads Single page Feedback? Corrections? Primary Products Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE $19.95 Add to Cart Featured Products view all Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE $19.95 Add to Cart Adafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy $4.95 Add to Cart Stacking Header Kit for ItsyBitsy or Teensy Out of Stock Short Male Header Kit for ItsyBitsy $0.75 Add to Cart Short Female Header Kit for ItsyBitsy $1.25 Add to Cart 38 Beginner Product guide Arduino Bluefruit nRF52 API Page last edited January 18, 2020 Text editor powered by tinymce. Arduino Support Setup nRF52 ADC