Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE
We have ✅ 1 available of the AF-4481 in our Sydney warehouse. An extra 28 units available with a short lead time.
The Adafruit ItsyBitsy nRF52840 Express brings Bluetooth Low Energy connectivity to the tiny ItsyBitsy form factor. Powered by the Nordic nRF52840 Cortex M4 at 64 MHz with 1 MB Flash, 256 KB RAM, and 2 MB QSPI Flash, it can act as both a BLE central and peripheral device — perfect for compact wireless projects.
At just 1.4" × 0.7", it supports both CircuitPython and Arduino IDE programming. The UF2 bootloader makes flashing as simple as dragging a file to a USB drive, and the FCC/IC/TELEC certified radio module provides reliable BLE connectivity with up to +8 dBm output power.
Key Features
- Nordic nRF52840 Cortex M4 – 64 MHz with floating point and DSP support
- Bluetooth Low Energy – BLE central and peripheral support; FCC/IC/TELEC certified
- Up to +8 dBm Output Power – Strong wireless range for BLE applications
- 1 MB Flash, 256 KB RAM – Generous memory for complex wireless projects
- 2 MB QSPI Flash – Onboard storage for CircuitPython code and data files
- CircuitPython & Arduino – Dual programming environment support
- Native USB – Serial console, HID keyboard/mouse, MIDI, or disk drive
- 21 GPIO Pins – 6× 12-bit analogue inputs, up to 12× PWM outputs
- VHigh Output & Level-Shifted Pin 5 – 5V logic output for NeoPixels, servos, and LEDs
- UF2 Bootloader – Drag-and-drop firmware flashing via USB
- Built-in DotStar RGB LED – Plus red LED for status indication
- 3.3V Logic – With power/enable pin and automatic USB/battery switching
Ideal For
- Compact Bluetooth Low Energy projects and wireless sensors
- BLE-connected wearables and IoT devices
- Wireless HID devices — BLE keyboards, mice, and controllers
- CircuitPython wireless prototyping
Package Contents
- 1× Adafruit ItsyBitsy nRF52840 Express
- 1× Header Strip (unsoldered)
Resources
The Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE appears in the following collections:
