# 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.

**7 device listed.**

## LILYGO T-Higrow

ESP32 plant sensor board with capacitive soil moisture, soil fertility, BH1750 light sensor, and DHT11/BME280 temperature/humidity — WiFi-connected smart plant care for gardens and greenhouses.

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

## LILYGO T-Energy S3

Affordable ESP32-S3 development board with 16MB flash, 8MB PSRAM, integrated 18650 battery holder, WiFi, and BLE 5.0 for battery-powered IoT sensor nodes under $10.

[Details](https://openhardware.directory/devices/lilygo-t-energy-s3) | [Markdown](https://openhardware.directory/devices/lilygo-t-energy-s3/md)

## LILYGO T8-C3

LILYGO T8-C3 is a compact ESP32-C3 development board featuring Wi-Fi, BLE 5.0, 4MB flash, TF card slot, and USB Type-C, requiring the T-U2T adapter for programming.

[Details](https://openhardware.directory/devices/lilygo-t8-c3) | [Markdown](https://openhardware.directory/devices/lilygo-t8-c3/md)

## LILYGO T-01C3

LILYGO T-01C3 is an ultra-compact ESP32-C3 RISC-V module with Wi-Fi and BLE 5.0, available with or without pre-soldered pins, featuring 5.33µA deep sleep current.

[Details](https://openhardware.directory/devices/lilygo-t-01c3) | [Markdown](https://openhardware.directory/devices/lilygo-t-01c3/md)

## 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)

## DFRobot FireBeetle 2 ESP32-E

Compact ESP32-E IoT microcontroller with WiFi 802.11 b/g/n, Bluetooth 4.2, 18 digital I/O, 11 analog inputs, 7 touch pins, 2 DACs, onboard WS2812 RGB LED, GDI display interface, and lithium battery charging in a tiny 25.4x60mm form factor.

[Details](https://openhardware.directory/devices/dfrobot-firebeetle-2-esp32-e) | [Markdown](https://openhardware.directory/devices/dfrobot-firebeetle-2-esp32-e/md)

## Adafruit ESP32-S2 Feather with BME280

ESP32-S2 Feather with an onboard BME280 temperature, humidity, and barometric pressure sensor, plus 4 MB flash, 2 MB PSRAM, native USB-C, STEMMA QT, and LiPoly charging.

[Details](https://openhardware.directory/devices/adafruit-esp32-s2-feather-bme280) | [Markdown](https://openhardware.directory/devices/adafruit-esp32-s2-feather-bme280/md)