# 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.**

## LILYGO T-Dongle ESP32-S2

USB-A dongle form factor board with ESP32-S2, 1.14-inch ST7789V IPS LCD, Wi-Fi, OTG, TF card slot, and Grove connector. Predecessor to the T-Dongle S3 series, ideal for portable USB IoT devices.

[Details](https://openhardware.directory/devices/lilygo-t-dongle-esp32-s2) | [Markdown](https://openhardware.directory/devices/lilygo-t-dongle-esp32-s2/md)

## Heltec Vision Master T190

ESP32-S3 development board with optional SX1262 LoRa module and 1.9-inch TFT color display. Supports Meshtastic, LoRaWAN, Arduino, MicroPython, and features integrated battery management with 18uA deep sleep.

[Details](https://openhardware.directory/devices/heltec-vision-master-t190) | [Markdown](https://openhardware.directory/devices/heltec-vision-master-t190/md)