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Open Hardware Directory

Find Devices Flashable with Your Own Firmware.

Build your own ideas using ready-made boards — no electrical engineering degree required. Flash your firmware, customise the hardware, and make it do exactly what you want.

 

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SBCs for Network Attached Storage (NAS)Zigbee buttons and smart switchesLoRa mesh devices with solar power inputHorizontal console-style devices with displays
781devices

DFRobot Xboard Relay

Dev Board
DFRobot Xboard Relay

Ethernet-controlled dual-relay board with ATmega32u4, WIZnet W5100 Ethernet, XBee socket, and two 10A relays for remote switching of AC/DC loads via web or MQTT, ideal for home automation.

ATmega32u4 @ 16MHz, single-core AVR2.5KB SRAM32KB (4KB bootloader)Ethernet 10/100 Mbps (W5100)
Smart SwitchHome AutomationBuilding Automation
~$35View

LILYGO T-Beam 1W

Dev Board
LILYGO T-Beam 1W

LILYGO T-Beam 1W is an ESP32-S3 LoRa development board featuring a 1-watt LoRa power amplifier for significantly extended transmission range, with GPS support, AXP2101 PMU, and 18650 battery compatibi

ESP32-S3FN8 (ESP32-53FN8)16MBWiFi 802.11 b/g/nBLE BLE 5.0
Long Range IotMeshtastic MeshAprs TrackingRural Sensor Network
~$47View

LILYGO T-SIM7080G S3

Dev Board
LILYGO T-SIM7080G S3

ESP32-S3 development board with SIM7080G NB-IoT/LTE-M/GNSS module, 16MB flash, 8MB PSRAM, 18650 battery support, and USB-C connectivity for low-power IoT applications.

Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions512KB SRAM16MBWiFi 802.11 b/g/nBLE BLE 5.0
Asset TrackingIot Sensor NodeRemote MonitoringSmart Agriculture
~$30View

Heltec HRI-4853

DTU
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.

Xtensa LX6 dual-core @ 240MHz, FPU, hardware crypto (AES/SHA)520KB SRAM4MB (QSPI)WiFi 802.11 b/g/nBLE Bluetooth 4.2, BLEEthernet 10/100 Mbps (RTL8201 PHY)
Modbus GatewayRs485 To EthernetIndustrial ControllerBuilding Automation
~$23View

LILYGO T3 LoRa32 V1.6.1

Dev Board
LILYGO T3 LoRa32 V1.6.1

ESP32-PICO-D4 development board with LoRa SX1276/SX1278 radio, 0.96\" SSD1306 OLED, microSD slot, WiFi, Bluetooth 4.2, and LiPo battery support in a compact 66×36mm form factor.

Xtensa LX6 dual-core @ 240MHz, FPU, HW crypto (AES/SHA/RSA)520KB SRAM4MBWiFi 802.11 b/g/nBLE BLE 4.2
Lora Mesh NetworkingOff Grid CommunicationCrowd CountingEnvironmental Monitoring
~$16View

LILYGO T-Relay S3

Dev Board
LILYGO T-Relay S3

ESP32-S3 board with 6 onboard relays, 16MB flash, 8MB PSRAM, WiFi, and BLE for ESPHome smart home automation, controlling lights, appliances, and HVAC systems.

Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions512KB SRAM16MBWiFi 802.11 b/g/nBLE BLE 5.0
Smart SwitchHome AutomationIndustrial Automation
~$24View

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Environmental Monitoring3D PrintingLuckFoxDIY KitARM Cortex-M0ESP32-S2 Board802.11 b/g/n 2.4GHzBluetooth 5.04G LTE Cat-1true3.0SX1262 868/915MHz1.31.0MeshCoreCEFully OpenMIT LicenseMicrophoneFriendlyElecready-to-useESP32 (Xtensa LX6)Industrial Controller802.11 a/b/g/n/ac/ax (WiFi 6)trueLTE Cat-410/100 Mbps (W5500)Zigbee 3.0SX1262 (868/915MHz)Thread (nRF52840)