# 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.

**2 device listed.**

## Bee Data Logger

ESP32-S3 based data logging board with DS3231 RTC, microSD card slot, dual STEMMA/Qwiic connectors, and LiPo charging. Achieves ~21µA deep sleep current. Open source hardware with Arduino and CircuitPython support.

[Details](https://openhardware.directory/devices/bee-data-logger) | [Markdown](https://openhardware.directory/devices/bee-data-logger/md)

## Heltec WiFi Kit 8

ESP8266-based IoT development board by Heltec with built-in 0.91-inch OLED display, Li-Po battery management, and WiFi connectivity in a compact 50.9x18.2mm form factor.

[Details](https://openhardware.directory/devices/heltec-wifi-kit-8) | [Markdown](https://openhardware.directory/devices/heltec-wifi-kit-8/md)