# 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.

**6 device listed.**

## LILYGO T7 V1.3 Mini32 ESP32

Compact ESP32 development board (Mini32 form factor) with 4MB Flash, WiFi 802.11 b/g/n, Bluetooth 4.2, CH340C USB-to-serial, TP4054 LiPo charger, and 1.25mm JST battery connector — a classic breadboard-compatible IoT dev board.

[Details](https://openhardware.directory/devices/lilygo-t7-v1-3-mini-32-esp32) | [Markdown](https://openhardware.directory/devices/lilygo-t7-v1-3-mini-32-esp32/md)

## Heltec ESP32-C3 Arduino Development Board

Ultra-compact RISC-V development board with ESP32-C3FN4, WiFi, BLE 5.0, integrated battery management, and USB-C — ideal for low-power IoT sensor nodes and wireless prototyping.

[Details](https://openhardware.directory/devices/heltec-esp32-c3) | [Markdown](https://openhardware.directory/devices/heltec-esp32-c3/md)

## Heltec WiFi Kit 32 (V3)

ESP32-S3-based IoT development board with built-in 0.96" OLED display, lithium battery management, WiFi and Bluetooth 5.0 connectivity, and USB-C interface in a compact 50mm form factor.

[Details](https://openhardware.directory/devices/heltec-wifi-kit-32-v3) | [Markdown](https://openhardware.directory/devices/heltec-wifi-kit-32-v3/md)

## Heltec HT-DE01 Multi Size E-Ink Drive Board

A compact universal e-ink driver board based on ESP32-S3FN8 with WiFi and Bluetooth connectivity, 24-pin FFC interface compatible with most e-ink displays, USB-C and LiPo battery support, and Arduino development environment.

[Details](https://openhardware.directory/devices/heltec-ht-de01) | [Markdown](https://openhardware.directory/devices/heltec-ht-de01/md)

## Heltec Wireless Bridge

ESP32 + SX1276 LoRa multi-protocol bridge in an aluminum enclosure, converting between WiFi, Bluetooth, and LoRa with 8MB flash and 8MB PSRAM.

[Details](https://openhardware.directory/devices/heltec-wireless-bridge) | [Markdown](https://openhardware.directory/devices/heltec-wireless-bridge/md)

## Heltec LoRa Kit 151

Ultra-low-power LoRaWAN development kit based on STM32L151CBU6 ARM Cortex-M3 MCU and Semtech SX1278 LoRa transceiver, with 6uA deep sleep current, integrated battery management, and CE certification.

[Details](https://openhardware.directory/devices/heltec-lora-kit-151) | [Markdown](https://openhardware.directory/devices/heltec-lora-kit-151/md)