# 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.

**12 device listed.**

## SenseCAP Indicator D1

Dual-MCU IoT development platform featuring ESP32-S3 and RP2040 processors with a 4-inch capacitive touchscreen, WiFi, BLE, optional LoRa, and multiple Grove sensor connectors for IoT prototyping.

[Details](https://openhardware.directory/devices/sensecap-indicator-d1) | [Markdown](https://openhardware.directory/devices/sensecap-indicator-d1/md)

## DFPlayer Mini MP3 Module

Compact MP3/WAV/WMA audio player module with microSD slot, UART serial control, and built-in 3W amplifier — one of the most popular audio modules for Arduino and IoT projects.

[Details](https://openhardware.directory/devices/dfplayer-mini) | [Markdown](https://openhardware.directory/devices/dfplayer-mini/md)

## Pine64 PineTime

Open-source smartwatch built on the Nordic nRF52832 SoC with 1.3-inch IPS touchscreen, heart rate sensor, accelerometer, and week-long battery life. Runs InfiniTime, Wasp-OS, or Zephyr firmware. Priced from $27.

[Details](https://openhardware.directory/devices/pine64-pinetime) | [Markdown](https://openhardware.directory/devices/pine64-pinetime/md)

## BeagleConnect Freedom

Open-source wireless IoT board with TI CC1352P7 dual-band radio (sub-GHz + 2.4 GHz), BLE 5.0, two mikroBUS sockets for 1,000+ Click boards, and Zephyr RTOS. Designed for long-range wireless sensor networks up to 1 km.

[Details](https://openhardware.directory/devices/beagleconnect-freedom) | [Markdown](https://openhardware.directory/devices/beagleconnect-freedom/md)

## BigTreeTech SKR Pro V1.1

32-bit 3D printer control board powered by STM32F407ZGT6 @ 168MHz. Supports 6 stepper drivers, triple extruder, dual Z, 12–24V input. Compatible with Marlin and Klipper firmware.

[Details](https://openhardware.directory/devices/bigtreetech-skr-pro-v1-1) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-pro-v1-1/md)

## BigTreeTech SKR V1.4 Turbo

32-bit 3D printer control board with LPC1769 @ 120MHz. Supports 5 stepper driver sockets, dual Z, 12–24V, TMC2209 UART. Popular Marlin and Klipper compatible upgrade board.

[Details](https://openhardware.directory/devices/bigtreetech-skr-v1-4-turbo) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-v1-4-turbo/md)

## BigTreeTech SKR Mini E3 V1.2

Ultra-quiet 32-bit 3D printer board with 4 integrated TMC2209 UART stepper drivers. STM32F103RCT6 @ 72MHz. Direct drop-in replacement for Ender 3. Supports Marlin and Klipper.

[Details](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v1-2) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v1-2/md)

## BigTreeTech SKR Mini E3 V2.0

Improved 32-bit control board with 4 integrated TMC2209 UART drivers, dual Z ports, and STM32F103RCT6 @ 72MHz. Drop-in upgrade for Ender 3, CR-10S, Ender 5. Marlin and Klipper ready.

[Details](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v2-0) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v2-0/md)

## BigTreeTech SKR Mini E3 V3.0

Latest 32-bit SKR Mini E3 with STM32G0B1RET6 @ 64MHz, 4 integrated TMC2209 UART drivers, USB-C, and CAN bus support. Compact Ender 3 drop-in upgrade. Marlin and Klipper compatible.

[Details](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v3-0) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-mini-e3-v3-0/md)

## BigTreeTech SKR Pico V1.0

Compact 32-bit 3D printer control board powered by RP2040 @ 133MHz. Designed for Voron 0.1 and small printers. 4 TMC2209 sockets, USB-C, 12–24V input. Klipper and Marlin compatible.

[Details](https://openhardware.directory/devices/bigtreetech-skr-pico-v1-0) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-pico-v1-0/md)

## BigTreeTech SKR 3

High-performance 32-bit 3D printer board with STM32H743VI @ 480MHz, 5 driver slots, CAN bus, FDCAN, WiFi module support, 12–24V, 10A bed output. Marlin, Klipper, and RepRapFirmware compatible.

[Details](https://openhardware.directory/devices/bigtreetech-skr-3) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-3/md)

## BigTreeTech SKR 3 EZ

Advanced 32-bit 3D printer board with STM32H743VI @ 480MHz and EZ driver system (tool-free). 5 EZ driver slots, CAN/FDCAN, WiFi module support, 10A bed, 12–24V. Marlin, Klipper, RRF ready.

[Details](https://openhardware.directory/devices/bigtreetech-skr-3-ez) | [Markdown](https://openhardware.directory/devices/bigtreetech-skr-3-ez/md)