# Arduino Stella

> Arduino's Ultra-Wideband (UWB) board with nRF52840 ARM Cortex-M4F, Truesense DCU040 UWB module, BLE 5.0, and NFC — enabling centimeter-accurate indoor positioning, asset tracking, and secure proximity interactions.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$76.5
- **Product Readiness:** consumer
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP
- **CPU Architecture:** ARM Cortex-M4F
- **CPU Cores:** 1
- **RAM:** 256KB SRAM
- **Flash:** 1MB
- **USB:** USB-C
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Dimensions:** 68.85 × 53.34mm
- **Weight:** 30g
- **Antenna:** Built-in PCB antenna
- **SD Card:** No

## Connectivity

- **Bluetooth:** BLE 5.0

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Compatible Firmware

arduino

## Use Cases

- asset-tracking
- industrial-iot
- iot

## Components

- **nRF52840** (mcu): Nordic nRF52840 at 64MHz with 1MB flash, 256KB RAM, BLE 5.0, Thread, Zigbee, and NFC-A tag emulation. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Finfocenter.nordicsemi.com%2Fpdf%2FnRF52840_PS_v1.1.pdf&ref=openhardware.directory&product=arduino-stella&source=md-export)
- **DCU040** (sensor): Truesense DCU040 UWB module for centimeter-accurate indoor positioning, ranging, and secure proximity detection. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.truesense.com%2Fproducts%2Fdcu040&ref=openhardware.directory&product=arduino-stella&source=md-export)

## Protocols

- **SPI**: MOSI: D11, MISO: D12, SCK: D13
- **I2C**: SDA: A4, SCL: A5
- **UART**: TX: D1, RX: D0

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | UART | digital-input, digital-output |
| D1 | UART TX | UART | digital-input, digital-output |
| D2 | Digital I/O |  | digital-input, digital-output, pwm |
| D3 | Digital I/O |  | digital-input, digital-output, pwm |
| D4 | Digital I/O |  | digital-input, digital-output, pwm |
| D5 | Digital I/O |  | digital-input, digital-output, pwm |
| D6 | Digital I/O |  | digital-input, digital-output, pwm |
| D7 | Digital I/O |  | digital-input, digital-output, pwm |
| D8 | Digital I/O |  | digital-input, digital-output, pwm |
| D9 | Digital I/O |  | digital-input, digital-output, pwm |
| D10 | Digital I/O |  | digital-input, digital-output, pwm |
| D11 | SPI MOSI | SPI | digital-input, digital-output, pwm |
| D12 | SPI MISO | SPI | digital-input, digital-output, pwm |
| D13 | SPI SCK | SPI | digital-input, digital-output, pwm |

## Description

## Overview

The Arduino Stella is a purpose-built Ultra-Wideband (UWB) development board that brings precision indoor positioning to the Arduino ecosystem. Powered by the Nordic nRF52840 ARM Cortex-M4F at 64MHz with BLE 5.0, it integrates the Truesense DCU040 UWB module for centimeter-accurate ranging and location tracking — far more precise than WiFi or Bluetooth positioning.

UWB technology enables use cases that were previously impractical with standard wireless protocols: real-time asset tracking in warehouses, follow-me autonomous vehicles, hands-free access control, precise indoor navigation, and secure device interactions. The board supports Apple Nearby Interaction, Android UWB Jetpack, and NXP Trimension frameworks for seamless smartphone integration.

The Stella is designed for logistics, healthcare, smart buildings, and industrial automation applications where knowing exact device position matters. It connects to the Arduino ecosystem for easy prototyping while delivering industrial-grade UWB performance.

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export) — $76.50
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export) — €84.20

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fstella&ref=openhardware.directory&product=arduino-stella&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fstella%2F&ref=openhardware.directory&product=arduino-stella&source=md-export)

## Tags

`arduino`, `uwb`, `ultra-wideband`, `nrf52840`, `ble`, `indoor-positioning`, `asset-tracking`, `nfc`

## Images

![Arduino Stella](https://nbg1.your-objectstorage.com/openhardware-directory/entities/arduino-stella/3a39e85dd7b3.jpg)
![Arduino Stella](https://nbg1.your-objectstorage.com/openhardware-directory/entities/arduino-stella/713080b555d3.jpg)

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