Скачать или смотреть Traffic lights with Arduino programming

A number of libraries come installed with the IDE, but you can also download or create your own. See these instructions for details on installing libraries. There is also a tutorial on writing your own libraries. See the API Style Guide for information on making a good Arduino-style API for your library.

Communication (1085)
Data Processing (285)
Data Storage (144)
Device Control (905)
Display (446)
Other (417)
Sensors (1022)
Signal Input/Output (394)
Timing (203)
Uncategorized (185)
Official Arduino Libraries
Robotics
Libraries for controlling servo and stepper motors.

Servo - for controlling servo motors.
Stepper - for controlling stepper motors.
Communication
Libraries for using the SPI, I2C and UART protocols.

SPI - for communicating with devices using the Serial Peripheral Interface (SPI) Bus.
Wire - Two Wire Interface (TWI/I2C) for sending and receiving data over a net of devices or sensors.
SoftwareSerial - for serial communication on any digital pins.
Connectivity
Libraries to access radio modules on different IoT boards (Wi-Fi, Bluetooth®, LoRa®, GSM, NB-IoT, Sigfox).

ArduinoIoTCloud - This library allows to connect to the Arduino IoT Cloud service. .
ArduinoBLE - library to use the Bluetooth® Low Energy on a selection of boards.
Ethernet - for connecting to the Internet via Ethernet.
GSM - for connecting to a GSM/GRPS network with the GSM shield.
MKRWAN - library for MKR WAN 1300/1310, for connecting to LoRaWAN® networks.
MKRGSM - library for MKR GSM 1400, for connecting to GSM/GPRS networks.
MKRNB - library for MKR NB 1500, for connecting to NB-IoT / Cat M1 networks.
SigFox - library for MKR FOX 1200, for connecting to the Sigfox network.
WiFi - library for the WiFi shield, for Internet connections via Wi-Fi.
WiFi101 - library for the MKR 1000 WiFi and WiFi101 shield, for Internet connections via Wi-Fi.
WiFiNINA - library for boards with a Wi-Fi NINA module, for Internet connections via Wi-Fi.