shop/ circuitrocks/ xiao nrf52840 – tiny arduino-compatible bluetooth

A compact wireless development board powered by the Nordic nRF52840. It is built for Bluetooth, wearable, sensor, and battery-powered projects.

Features:

  • Nordic nRF52840 microcontroller
  • ARM Cortex-M4 processor with FPU
  • Clock speed up to 64MHz
  • Bluetooth Low Energy 5.4
  • Supports Bluetooth Mesh and NFC
  • 256KB RAM
  • 1MB internal Flash
  • 2MB onboard Flash
  • 11 GPIO / PWM pins
  • 6 ADC inputs
  • Supports I2C, SPI, UART, NFC, and SWD
  • Built-in lithium battery charging support
  • Standby power below 5µA
  • Compact size: 21 × 17.8mm
  • Supports Arduino, MicroPython, and CircuitPython

Applications:

  • Bluetooth devices
  • Wearable electronics
  • Wireless sensors
  • IoT projects
  • Battery-powered builds
  • Robotics
  • Arduino projects
  • Compact prototypes

FAQ

Will this ship from Manila?

Yes — all stock ships from our Quezon City warehouse. Order before 4 PM weekdays for same-day cutoff via J&T or LBC.

Do you ship nationwide?

Yes. Metro Manila usually arrives next-day; provincial 1–3 working days.

Can I get this on a school PO or class order?

Yes — we accept Purchase Orders from accredited schools and universities. Contact us with your PO details and we'll process it.

Is this compatible with Arduino, ESP32, or Raspberry Pi?

Most parts work with common maker boards — check the description for specific pinout / voltage notes. If you're unsure, send us a message before ordering.

What's your return policy?

7-day inspection window for DOA units. Email proof of issue and we'll ship a replacement or refund. Used / installed parts are not returnable unless faulty.

Do you offer technical support?

Yes — questions land on our forum or via email, weekday or weekend. We've actually wired up most of what we sell.

Build with this board

// from learn.circuit.rocks

Notes from the bench

// from blog.circuit.rocks

Ask the community

// from forum.circuit.rocks