# device — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link.

**3 device listed.**

## Pycom Pytrack

GPS/GNSS tracking expansion board for Pycom modules with GLONASS/Galileo/QZSS support, 3-axis accelerometer, MicroSD slot, LiPo charger, USB serial, and 5 extra GPIO headers. Ultra-low 1µA deep sleep current.

[Details](https://openhardware.directory/devices/pycom-pytrack) | [Markdown](https://openhardware.directory/devices/pycom-pytrack/md)

## Pycom Pysense

Multi-sensor expansion board for Pycom modules featuring light, barometric pressure, humidity, temperature, and 3-axis accelerometer sensors. Includes MicroSD slot, USB serial, LiPo charger, and ultra-low 1µA deep sleep.

[Details](https://openhardware.directory/devices/pycom-pysense) | [Markdown](https://openhardware.directory/devices/pycom-pysense/md)

## Adafruit HalloWing M0 Express

Skull-shaped wearable microcontroller with ATSAMD21G18 at 48MHz, 1.44" 128x128 TFT display, 3-axis accelerometer, light sensor, 4 capacitive touch pads, 2W speaker driver, 8MB SPI flash, and LiPo charging.

[Details](https://openhardware.directory/devices/adafruit-hallowing-m0-express) | [Markdown](https://openhardware.directory/devices/adafruit-hallowing-m0-express/md)