LiquidCrystal
Library for controlling character LCDs based on the Hitachi HD44780 driver.
Servo
Standard library for controlling hobby servo motors.
DHT Sensor Library
Standard Arduino library for DHT11, DHT22, and other temperature/humidity sensors.
FastLED
The definitive library for controlling addressable LED strips (NeoPixel, WS2812, etc.).
AccelStepper
Library for driving stepper motors with acceleration and deceleration control.
Adafruit GFX Library
Base graphics library for drawing text, lines, shapes, and bitmaps on displays.
Adafruit INA219
Current, voltage, and power monitor for high-side DC measurements over I2C.
Adafruit NeoPixel
Library for addressable RGB LEDs such as NeoPixel and WS2812 strips.
Adafruit SSD1306
OLED display driver for SSD1306-based monochrome screens.
Bounce2
Debouncing helper for pushbuttons and switches.
DallasTemperature
High-level interface for DS18B20 and other OneWire temperature sensors.
EEPROM
Built-in persistent storage for saving small configuration values.
Ethernet
Wired Ethernet networking support for Arduino boards and shields.
HX711
Load-cell amplifier and 24-bit ADC library.
IRremote
Infrared receiver and transmitter support for remote controls and IR devices.
LiquidCrystal_I2C
I2C backpack version of the classic character LCD interface.
LiquidCrystal_PCF8574
PCF8574-based I2C character LCD controller library.
MFRC522
MFRC522 RFID reader and card authentication library.
NewPing
Ultrasonic distance measurement helper for HC-SR04 style sensors.
OneWire
Low-level OneWire bus driver for sensors and accessories.
PubSubClient
Lightweight MQTT client for Arduino networking projects.
RTClib
Real-time clock helper for DS3231, DS1307, and related RTC chips.
SD
SD card file system access for reading and writing files.
SoftwareSerial
Software-based serial port implementation for extra UART channels.
SPI
Standard library for high-speed Synchronous Peripheral Interface communication.
Stepper
Built-in Arduino library for simple stepper motor control.
TFT
Graphics library for Arduino TFT displays.
TinyGPS++
NMEA parsing library for GPS modules and location tracking.
U8g2
Flexible monochrome graphics library for displays and OLED modules.
Wire (I2C)
Fundamental library for I2C (Two-Wire Interface) communication.
