# 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.

**11 device listed.**

## 0.91" OLED I2C Display (128x32)

Compact 0.91-inch monochrome OLED display module with 128x32 pixel resolution and SSD1306 driver. Communicates over I2C interface, ideal for small status readouts and embedded projects.

[Details](https://openhardware.directory/devices/oled-091-inch-i2c-display) | [Markdown](https://openhardware.directory/devices/oled-091-inch-i2c-display/md)

## 0.96" OLED SSD1306 Display (128x64)

Popular 0.96-inch monochrome OLED display with 128x64 pixel resolution and SSD1306 driver IC. I2C interface with wide library support, the go-to display for Arduino and ESP32 projects.

[Details](https://openhardware.directory/devices/oled-096-inch-ssd1306-display) | [Markdown](https://openhardware.directory/devices/oled-096-inch-ssd1306-display/md)

## A4988 Stepper Motor Driver Module

Allegro A4988-based stepper motor driver module with microstepping up to 1/16 step, handling up to 2A per coil. Includes heatsink. Essential for 3D printers, CNC machines, and precision robotics.

[Details](https://openhardware.directory/devices/a4988-stepper-motor-driver) | [Markdown](https://openhardware.directory/devices/a4988-stepper-motor-driver/md)

## 1.3" OLED I2C Display (128x64)

Larger 1.3-inch monochrome OLED display with 128x64 pixel resolution and SH1106 driver IC. I2C interface with improved readability over smaller 0.96" modules, great for dashboards and readouts.

[Details](https://openhardware.directory/devices/oled-13-inch-i2c-display) | [Markdown](https://openhardware.directory/devices/oled-13-inch-i2c-display/md)

## TP4056 Charge Controller Module

Li-Ion/LiPo battery charging module based on the TP4056 IC with built-in battery protection circuit. Mini USB 5V input, 1A charging current. Essential for portable and battery-powered IoT projects.

[Details](https://openhardware.directory/devices/tp4056-charge-controller) | [Markdown](https://openhardware.directory/devices/tp4056-charge-controller/md)

## 1.77" SPI TFT Display (128x160)

Color 1.77-inch TFT LCD display module with 128x160 pixel resolution and ST7735 driver. SPI interface for fast refresh rates, capable of displaying full-color graphics, images, and UI elements.

[Details](https://openhardware.directory/devices/tft-177-inch-spi-display) | [Markdown](https://openhardware.directory/devices/tft-177-inch-spi-display/md)

## RFID RC522 Kit

NXP MFRC522-based 13.56MHz RFID reader/writer kit with SPI interface, including reader module, MIFARE 1K card, and key fob. Ideal for access control and identification projects.

[Details](https://openhardware.directory/devices/rfid-rc522-kit) | [Markdown](https://openhardware.directory/devices/rfid-rc522-kit/md)

## ESP8266 ESP-01S WiFi Module

Compact ESP8266-based WiFi dev board with 1MB flash, 2 GPIO pins, and 802.11 b/g/n. Runs Arduino, MicroPython, ESPHome, and Tasmota firmware for smart home and IoT projects.

[Details](https://openhardware.directory/devices/esp8266-esp-01s) | [Markdown](https://openhardware.directory/devices/esp8266-esp-01s/md)

## LoRa A39-T230A30D1a SX1262 Module

Long-range LoRa transceiver module with Semtech SX1262, UART interface, 1W output power, and up to 16km range at 210-241MHz. Ideal for remote telemetry and agricultural IoT.

[Details](https://openhardware.directory/devices/lora-a39-module) | [Markdown](https://openhardware.directory/devices/lora-a39-module/md)

## FT232 USB to TTL Serial Adapter

FTDI FT232RL-based USB-to-TTL serial adapter with selectable 3.3V/5V logic, 6-pin header, and full modem signals. Essential tool for programming Arduino, ESP8266, and other MCUs.

[Details](https://openhardware.directory/devices/ft232-usb-to-ttl) | [Markdown](https://openhardware.directory/devices/ft232-usb-to-ttl/md)

## nRF24L01 2.4GHz Wireless Module

Nordic nRF24L01+ 2.4GHz wireless transceiver module with SPI interface, 2Mbps data rate, 126 channels, and up to 100m range. Popular choice for Arduino and Raspberry Pi wireless sensor networks.

[Details](https://openhardware.directory/devices/nrf24l01-wireless-module) | [Markdown](https://openhardware.directory/devices/nrf24l01-wireless-module/md)