# 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.**

## Ai-Thinker Ra-09-DTU

Intelligent wireless LoRaWAN DTU with isolated RS485 interface, powered by STM32WLE5CCU6 ARM Cortex-M4 MCU with integrated Sub-GHz radio. Wide 6-36V input for industrial deployment.

[Details](https://openhardware.directory/devices/ai-thinker-ra-09-dtu) | [Markdown](https://openhardware.directory/devices/ai-thinker-ra-09-dtu/md)

## Heltec HRI-485X

Industrial RS-485 wireless converter with ESP32, LoRa SX1262, Ethernet, and ESPHome support. Converts RS-485/Modbus serial data to LoRa, LoRaWAN, LTE, or Ethernet for long-range industrial IoT communication. DIN rail mountable with IP65 protection and 4.5-28V wide voltage input.

[Details](https://openhardware.directory/devices/heltec-hri-485x) | [Markdown](https://openhardware.directory/devices/heltec-hri-485x/md)

## Heltec HRI-4853

ESP32-based RS-485 to Ethernet/LTE converter (DTU) with built-in web configuration, Modbus support, DIN-rail mounting, and ESPHome compatibility for industrial IoT and Home Assistant integration.

[Details](https://openhardware.directory/devices/heltec-hri-4853) | [Markdown](https://openhardware.directory/devices/heltec-hri-4853/md)