A list of the 576 libraries in the architecture avr.
| AStar32U4 | A-Star 32U4 Arduino library |
| ATmega32U4 Grove Air quality sensor | ATmega32U4 Arduino library to read values from Grove Air Quality Sensor. |
| ATtinySerialOut | Minimal bit-bang send serial 115200 or 38400 baud for 1 MHz or 230400 baud for 8/16 MHz ATtiny clock.Perfect for debugging purposes.Code size is only 76 Bytes@38400 baud or 196 Bytes@115200 baud (including first call) |
| AceMenu | A library that makes coding a user Menu a breeze. |
| Adafruit SleepyDog Library | Arduino library to use the watchdog timer for system reset and low power sleep. |
| Adafruit TiCoServo | Use NeoPixels and servos in the same Arduino sketch (with caveats) |
| AdagioPro | Controls Adagio RGB Poollights over RS-485 |
| ADCTouch | Create Touch Sensors with a single (Analog)Pin without external Hardware |
| ADCTouchSensor | Create Touch Sensors with a single analog pin without external hardware |
| ADSWeather | Arduino library to interface with the Argent Data Systems weather station sensor assembly. |
| ADS1110 | ADS1110 Driver (16-BIT ADC with Onboard Reference, PGA and I2C Interface) |
| ADS1118 library | Arduino library for TI ADS1118 (16-Bit Analog-to-Digital Converter with Internal Reference and Temperature Sensor). |
| AlignedJoy | Allows Arduino/Genuino boards to read a variety of analog joystick by aligning axis values (XY). |
| AllWize | Arduino-compatible library to interface RC1701HP-OSP/WIZE radio modules |
| AltSoftSerial | Software emulated serial using hardware timers for improved compatibility |
| Altino | The library for the Altino car. |
| Ambimate | A library for the Ambimate sensor board from TE |
| analogComp | Set and manage the integrated analog comparator |
| AnalogTouch | AnalogTouch library for Arduino |
| AntaresLoraID | Lora.id Arduino Library for Dragino/RFM and standalone LoRaWAN modules. |
| ArdTap | A library to manage an Arduino board from a mobile in a couple of minutes. No coding, only configuration. |
| ArdVoice | A library to play audio (voices) on the Arduboy game system. |
| Arduboy | The Arduboy core library. |
| ArduboyPlaytune | A library for playing musical scores and tones that is compatible with the Arduboy game system. |
| Arduboy-TinyFont | Tiny 4x4 Font for Arduboy which contains the small ASCII Table from 32 to 127. The sprite for the font uses 192 bytes. |
| ArduboyTones | A library for playing a sequence of tones, intended for use with the Arduboy game system. |
| Arduboy2 | An alternative library for use with the Arduboy game system. |
| arduino-fsm | A library for implementing a finite state machine |
| ArduinoIHC | A Library for connecting to the IHC Controller data in/out. |
| ArduinoLang | Translate Wiring and CPP language to your native language. |
| ArduinoLearningKitStarter | Library for the ArduinoLearningKitStarter (ALKS) board by RoboticsBrno with definition of pins and initialization of peripheries. |
| arduino-menusystem | A library for implementing a menu system |
| Arduino POST HTTP Parser | A library that allows for easy parsing of POST packages. |
| Arduino Smart Watch | A library that makes coding a watch for Arduino Micro and so on |
| ArduinoSTL | A port of uClibc++ packaged as an Arduino library. |
| ArduinoUniqueID | Arduino Library to gets the Manufacture Serial Number from the Atmel AVR, SAM, SAMD, STM32, and ESP Microcontroller. |
| Arduino Uno WiFi Dev Ed Library | This library allows users to use network features like rest and mqtt. Includes some tools for the ESP8266. |
| Arduino-Websocket-Fast | Websocket client library (fast data sending). |
| Arduino_AVRSTL | A port of ArduinoSTL Arduino library. |
| Arduino_Sensorkit | Arduino Sensor Kit |
| ArxRobot Library | Enables easy access to the controls of Arxterra robots. |
| AskSinPP | Homematic Protocol Library |
| Aspen SIM800 | A comprehensive SIM800 Series library for simplified and in-depth chip access. |
| AsyncAnalog | Arduino Library for async reading of an analog pin |
| AtTouch | Arduino Library for the Atmel AT42QT1070 QTouch 7-channel Sensor IC via i2c. |
| Atmel TSS463C VAN bus Datalink Controller library | A library for the Atmel TSS463/TSS461 VAN Datalink Controller |
| AudioShieldDTMF | MCP4921 Audio Shield DTMF Example |
| AutoAnalogAudio | Automated analog reads and analog output (streaming) using Arduino DAC(or PWM), ADC, DMA and Timers |
| avdweb_AnalogReadFast | Fast analogRead 10/12 bit ADC for the Arduino Zero and Uno |
| AVR-context | This library provides a low-level facility for context switching between multiple threads of execution and contains an implementation of asymmetric stackful coroutines on an AVR micro-controller. |
| AvrHeap | Library to runtime analyze the structure of the heap (AVR328). |
| AVR Standard C Time Library | Real Time functions for Goldilocks ATmega1284p & ATmega2560 |
| avr_stl | A port of ArduinoSTL Arduino library. |
| Awesome | The library that supports the Awesome Shield PCB. |
| BackSeatDriver | Simple move and turn semantics for self-driving vehicles. |
| Balboa32U4 | Balboa 32U4 Arduino library |
| BaroLibrary | Library for Measurement Specialties MS5637-02BA03 Altimeter/Pressure sensor (including Freetronics BARO module). |
| Beelan LoRaWAN | LoRaWAN Arduino Library for standalone LoRaWAN modules class A and C with a simple API. |
| BH1750 | Arduino library for the digital light sensor breakout boards containing the BH1750FVI IC |
| BigFont01 | Library for displaying large characters on LCD character displays using the HD44780 driver. |
| BigFont01_I2C | Library for displaying large characters on LCD character displays using the HD44780 driver. |
| BigFont02 | Library for displaying large characters on LCD character displays using the HD44780 driver. |
| BigFont02_I2C | Library for displaying large characters on LCD character displays using the HD44780 driver. |
| BlaeckSerial | A simple library to send binary (sensor) data via Serial port to your PC. |
| BLE SDK for Arduino | Nordic BLE SDK for Arduino for nRF8001 products such as the BLE Shield, Blend and Blend Micro. |
| BlueDisplay | This library enables an Android smartphone or tablet to act as a graphical display for your Arduino. |
| BMC | Fully featured MIDI Controller Library with a Companion Editor App for 32-bit Teensy boards, Requires Teensyduino. |
| Botly | Librarie permettant de piloter le robot Botly développé par l'association La Machinerie |
| Braccio | Allows to move each Braccio parts using simple calls. |
| BraccioRobot | Braccio Robot controller API. |
| BraccioV2 | A library that enables more functionality for use with the Tinkerkit Braccio Arm. |
| Brino | A biblioteca possibilita o uso de termos em portugues (Brino) para a programacao do arduino. |
| BSEC Software Library | Bosch Sensortec Environmental Cluster (BSEC) Software library |
| BTLE | Arduino library for basic Bluetooth LE communication. |
| Buzz | AC/static electricity-based motion detection using only the ADC and a wire! |
| cI2C | Arduino Hardware I2C for AVR (in plain c) |
| Capacitor | Measure capacitance from 0.2pF to 100uF with no external hardware. |
| CaptureTimer | Arduino Input Capture Library |
| CarreraDigitalControlUnit | Carrera® DIGITAL 124/132 interface library for Arduino and mbed OS |
| CEClient | A library which allows communication with HDMI CEC capable devices. |
| cerebro | A library that makes cerebro works easly. |
| Ch376msc | A library for CH376 file manager control chip. |
| Charge n Boost | A library for the Charge 'n Boost lithium charger and usb booster |
| ChirpSDK | Chirp SDK |
| Ciao | Enables communication between microcontroller and MIPS cpu. Natively support network communications, terminal (linux) and file access. |
| Circios Roboter-Steuerung | Arduino-Bibliothek zum Ansteuern des "Circios" Schulroboters |
| CircuitsFunBasic | Essential basic components library by CircuitsFun. |
| cmdArduino | A small command-line library to make development easier. |
| CMMC Packet | A simple CMMC Packet data structure. |
| CMMC_LED | An easy led controller |
| CMMC_NB-IoT | CMMC_NB-IoT |
| CoDrone | A library for CoDrone users |
| ComDriverSpi | SPI communication driver class |
| Commanders | This is a library for Arduino to handle input devices like buttons, Dcc (railroad modeling), CAN or I2C bus, or serial interface to give orders. |
| Comp6DOF_n0m1 | An Arduino Library for compass tilt compensation and hard iron offset |
| ControleForno | Uma biblioteca para controle e automacao de forno tipo esteira. |
| CONTROLLINO | Support library for CONTROLLINO PLC boards |
| Corsair Lighting Protocol | Control LED strips via USB from a PC. |
| CRC Simula Arduino IDE Library | Support Library for Chicago Robotics Simula Boards. |
| CRC VCNL4200 Library | Library for control of the Vishay VCNL4200 proximity and ambient light sensor package. Now includes limited interrupt support. |
| CS5490 | A library control an integrated circuit Cirrus Logic - CS5490 |
| Cumulocity IoT client | A client library to connect your Arduino to Cumulocity IoT cloud over MQTT. |
| CurrentTransformer | Arduino Library for measuring current in 50/60Hz circuits using current transformers. |
| Cytron 3A Motor Driver Shield | Library for controlling Cytron 3A Motor Driver Shield |
| Cytron G15 Shield | Library for controlling G15 Cube Servo |
| Cytron Maker Sumo Library | Library for Cytron Maker Mini Sumo controller. |
| Cytron_PS2_Shield | This library is for the Cytron PS2 Shield. |
| DAC7611 | A library that makes interfacing the DAC7611p a breeze. |
| databot | Official databot library supporting databot, based on Arduino |
| DatavisionLCD | This library allows communication with Phico Datavision LCD. |
| DCCpp | This is a library to control DCC devices. |
| DcDccNanoController | This library is made to build a basic Dcc controller on small Arduino Nano or Uno. |
| dcf77_xtal | DCF77 decoder with excellent noise tolerance. |
| DDS | Generate sinusoids on AVR-based Arduinos at varying frequencies. Requires an analog low-pass filter. |
| DebounceEvent | Simple push button and toggle switch debounce library that reports number of clicks and length |
| Debugger | A terminal debugger with break points and data watches. |
| DeepSleepScheduler | Lightweight, cooperative task scheduler with configurable sleep and task supervision. |
| DHTlib | AVR Optimized Library for DHT Temperature & Humidity Sensor on AVR only. |
| DHT sensor library for ESPx | Arduino ESP library for DHT11, DHT22, etc Temp & Humidity Sensors |
| digitalPinFast | More speed for digitalPin operations. |
| Dimmable Light for Arduino | This library allows you to command electrical appliances through dimmer (also known as thyristor) |
| Dimmer class for ATmega32U4 | Easy use of 10/12 bit PWM outputs on ATmega32U4 for dimmer applications. |
| DIO2 | Fast digital input/output functions. |
| DMOscillator | A library that makes easy on/off control on a pin at fixed or dynamic rate. |
| DMStepper | A library to drive stepper motors. |
| DMTimer | A library that simplifies non blocking recurrent calls. |
| DMD2 | Updated (beta) library for Freetronics DMD dot matrix displays. |
| DMXSerial | Enables DMX communication using the built-in serial port for Arduino boards. |
| DotMatrix5x7 | Drives 5x7 dot matrix display directly connected to Arduino pins |
| DS1307 Emulator | An emulator of the DS1307, which transform the Arduino in an RTC chip without actually having a physical RTC. |
| DS3232RTC | Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks. |
| DU-INO | DU-INO base Arduino library. |
| dwarf433 | Arduino libary to transmit arbitrary RF433 signals |
| eBoard shackle the Arduino | All in one library to run qfixSoccerBoard code on the Arduino |
| eBtn | A library to handle Buttons based on events. |
| EEvar | Allows to save your variables in EEPROM memory. Works with any POD (bool, int, float, custom structs) and String. Simple. Lightweight. |
| E131 | E1.31 sACN for AVR Ethernet and ESP8266. |
| EasyButtonAtInt01 | Small and easy to use Arduino library for using push buttons at INT0/pin2 and / or any PinChangeInterrupt pin.Functions for long and double press detection are included.Just connect buttons between ground and any pin of your Arduino - that's itNo call of begin() or polling function like update() required. No blocking debouncing delay. |
| EasyWebServer | An easy-to-use web server |
| Easyuino | It offers a set of APIs to easily make beginners use several different sensors and devices using only the Easyuino |
| EducationShield | Library used for the completion of all the projects related to CTC |
| EEWrap | A convenient library allowing one to use the EEPROM just like RAM. |
| EE895 Arduino Library | Library for the EE895 CO2 Sensor |
| EEPROM-Storage | Generic class to wrap an EEPROM variable on the Particle and Arduino platforms. |
| EEPROMWearLevel | EEPROMWearLevel reduces EEPROM wear by writting a new value to an other EEPROM location. |
| EEPROM_CAT25 | Driver for On Semiconductor CAT25 SPI EEPROM chips for AVR, SAM3X (Due), and SAM M0+ (SAMD, SAML, SAMC) microcontrollers |
| ElectronicsEducation | Arduino libraries and educational materials for workshop |
| Engineer Regulator | Arduino library for temperature controller. Stores settings in EEPROM. Hysteresis. (AVR and ESP) |
| Environment | Read enviroment sensors |
| ESPpassthrough | Library that uses ESP AT serial commands to set it in Passthrough (transparent) Mode. |
| Esplora | Grants easy access to the various sensors and actuators of the Esplora. For Arduino Esplora only. |
| EtherCard | EtherCard is an IPv4 driver for the ENC28J60 chip. |
| EtherSia | IPv6 library for the ENC28J60, W5500 or W5100 Ethernet controllers |
| EthernetIndustruino | Library for the Industruino Ethernet module |
| ezButton | Button library for Arduino |
| ezBuzzer | Buzzer library for Arduino |
| ezOutput | Output library for Arduino |
| FaBo 201 3Axis ADXL345 | A library for FaBo 3AXIS I2C Brick |
| FaBo 202 9Axis MPU9250 | A library for FaBo 9Axis I2C Brick |
| FaBo 203 Color S11059 | A library for FaBo Color I2C Brick |
| FaBo 204 Baromter MPL115A2 | A library for FaBo Barometer I2C Brick |
| FaBo 205 Proximity VCNL4010 | A library for FaBo Proximity I2C Brick |
| FaBo 206 UV Si1132 | A library for FaBo UV I2C Brick |
| FaBo 207 Temperature ADT7410 | A library for FaBo Temperature I2C Brick |
| FaBo 208 Humidity HTS221 | A library for FaBo Humidity I2C Brick |
| FaBo 209 KTemp MCP3421 | A library for FaBo KTemp I2C Brick |
| FaBo 210 GPIO PCAL6408A | A library for FaBo GPIO I2C Brick |
| FaBo 211 7Segment LED TLC59208F | A library for FaBo 7Segment LED I2C Brick |
| FaBo 212 LCD PCF8574 | A library for FaBo LCD I2C Brick |
| FaBo 213 LCD mini AQM0802A | A library for FaBo LCD mini I2C Brick |
| FaBo 214 OLED EROLED096 | A library for FaBo OLED I2C Brick |
| FaBo 215 RTC PCF2129 | A library for FaBo RTC I2C Brick |
| FaBo 217 Ambient Light ISL29034 | A library for FaBo Ambient Light I2C Brick |
| FaBo 222 Environment BME680 | A library for FaBo Environment I2C Brick |
| FaBo 223 Gas CCS811 | A library for CCS811 that getting values of CO2 and TVOC. |
| FaBo 230 Color BH1749NUC | A library for FaBo Color I2C Brick |
| FaBo GPIO40 PCA9698 | A library for FaBo GPIO. |
| FaBo Motor DRV8830 | A library for FaBo Motor. |
| FaBo PWM PCA9685 | A library for FaBo PWM. |
| FadeLed | Makes fading LEDs easy |
| FastAccelStepper | A high speed stepper library for Atmega 328p (nano), 2560 and ESP32 |
| FastGPIO | Faster general-purpose I/O |
| FastShiftIn | Arduino library for (AVR) optimized shiftIn - e.g. for 74HC165 |
| FDC2214 | TI FDC2214 capacitative sensor library |
| FingerLib | Allows for servo-like functionality for finger control. For Atmega 2560 (Almond PCB) and Arduino Zero (Chestnut) only. |
| Finite-State-Machine-Arduino | With that we can create proper states for objects. |
| fix_fft | A library for implementing fixed-point in-place Fast Fourier Transform on Arduino. It sacrifices precision and instead it is way faster than floating-point implementations. |
| Flash | A library to wrap accessing and writing to flash |
| Flicker | A library for making capacitive touch easy to use. |
| FlightSimOutputs | Library for easy handling of digital outputs on Midwest737Simulations.com Multi Output card. |
| FlightSimSwitches | Library for easy handling of Switches and Buttons in X-Plane with PJRC's Teensy |
| fp64lib | Handcrafted 64-bit floating point routines for AVR/arduino microprocessors. |
| FreeRTOS | FreeRTOS Real Time Operating System implemented for AVR (Uno, Nano, Leonardo, Mega). |
| FreqPeriodCounter | Smart library with comprehensive functions for counting (multiple) frequencies. For Arduino Uno and Zero. |
| FrequencyDetector | Measure the main frequency of analog captured signal connected to an Arduino and check for noise and mute. |
| frt | Lightweight, easy-to-use wrapper around the Arduino_FreeRTOS_Library. |
| ft817 | Serial CAT interface to control a Yaesu FT-817 transceiver |
| FTOLED | Library to drive Freetronics OLED128 128x128 display. |
| FTRGBLED | Freetronics RGBLED module (WS2801-based) driver library. |
| Gamebuino Classic | Create your own games on a fun and retro console. |
| Gamer | A library for the DIY Gamer Kit by Technology Will Save Us. |
| GamerIR | Infrared communication library for the DIY Gamer Kit by Tech Will Save Us |
| Geekble_Oscillator | Generate pulse from 31.25KHz to 8MHz |
| Gemelon Pushbutton | Arduino library to debounce a pushbutton. |
| ghaemShopSmSim | arduino SMS Remote Controler over ghaemShopSmSim protocol |
| GifDecoder | Play Animated GIFs |
| GMSN Pure Digit | This library is used to control the GMSN! Pure Digit. |
| Goldilocks Analogue DAC Library | DAC (MCP4822) functions for Goldilocks Analogue |
| Goldilocks Analogue SPI RAM Library | Firmware for SPI solid state memory (including SRAM, FRAM, EEPROM) devices for Goldilocks Analogue |
| Grove - Air quality sensor | Arduino library to control Grove Air Quality Sensor. |
| GSM | Enables GSM/GRPS network connection using the Arduino GSM Shield. |
| GSM-Playground | A library for GSM Playground device. |
| GUIslice | GUIslice embedded touchscreen GUI library in C for Arduino & Raspberry Pi |
| HardWire | A spinoff of the Wire. This library allows you to communicate with I2C and Two Wire Interface devices, and control each step of any I2C transaction. |
| HardwareSerial_RS485 | Concurrent multi-drop (i.e. multi-master, multi-slave) RS485 communication library |
| Hello Drum | Arduino Library for piezo sensing |
| HLW8012 | HLW8012 for Arduino / ESP8216 |
| HV518 | Arduino library to control Microchip HV518 |
| IBot | Arduino library for I-Bot camp. |
| iBotX | Arduino library for "i-Bot X" to be used in i-Bot Camp by Robot Club KMITL (Thailand) |
| IBusBM | Arduino library for the Flysky/Turnigy RC iBUS protocol - servo (receive) and sensors/telemetry (send) using hardware UART (AVR, ESP32 and STM32 architectures) |
| IRremote | Send and receive infrared signals with multiple protocols |
| iSYNC | A library that makes Internet of Things for iSYNC IoT Cloud Platform. |
| iSYNC_BC95_Arduino | A network library for BC95 NB-IOT module on Arduino platform (iSYNC.pro platform support). |
| IGB-FlashSst26 | Spi Flash Memory Library for Microchip SST26 1,8V |
| Infrared | An object oriented library for sending, receiving, generating, and decoding IR signals on the Arduino. |
| InkyBoard | Bibliotheek om gebruik te maken van het InkyBoard van InkyCode |
| Iobeam | Client library for using the iobeam cloud. |
| IRLremote | Lightweight Infrared library for Arduino |
| IRMP | Receive and send infrared signals. |
| Itty Bitty | With the fastest possible Arduino-compatible GPIO and register manipulation...It's the biggest of hits when you need to bang bits! |
| IwitVolumeKnob | Library to support the hardware built into many chinese volume knobs (iWit) |
| J1850 VPW Arduino Transceiver Library | Arduino library for J1850-VPW-Arduino-Transceiver |
| JC_Button | Arduino library to debounce button switches, detect presses, releases, and long presses. |
| jm_CPPM | A CPPM Library for Arduino. |
| jm_LiquidCrystal_I2C | My enhanced fm_LiquidCrystal_I2C Arduino Library. |
| jm_Wire | Revisited Arduino Wire Library. |
| JMAFoundation | A library that provide event response for Arduino. |
| JMA_SPComm | A library that makes simple communication protocol for Arduino. |
| JTAG | A library to perform JTAG operations and play XSVF. |
| KAI Pro Library | Grants easy access to the various species of the Kai Pro. |
| KellerModbus | Arduino library for communication with Keller pressure and water level sensors via Modbus. |
| keyboardButton | Convinient way to map a push-button to a keyboard key. This library utilize the ability of 32u4-based Arduino-compatible boards to emulate USB-keyboard. |
| KONNEKTING Device Library | A library that enables creating KNX devices powered by Arduino. |
| LCBUrl | A library to manipulate URL strings |
| LcdEffects | A library that lets you apply special effects to LCD text. |
| LCDMenuLib | A library with you can generate a menu`s based on the nested set model with multi layers |
| LCD03 | A library for I2C control of the LCD03 20x4 and 16x2 serial LCD modules from Robot Electronics. |
| LCD_ST7032 | Arduino library for ST7032 LCD controller with i2c interface |
| leOS | Simple scheduler that run little tasks within IRSs |
| leOS2 | Simple scheduler based on watchdog that runs little tasks within IRS |
| Leaphy Extra Extension | Provides Extra functionality to Leaphy robots |
| Leaphy Original Extension | Provides functionality to program Leaphy Original robots |
| LibAPRS_Tracker | A library that turns the aruino into a APRS Packet Sender |
| LibLanc | Allow camera control via the Sony lanc protocol |
| LiquidCrystal I2C | A library for I2C LCD displays. |
| LiquidCrystal_AIP31068 | A library for AIP31068 I2C/SPI LCD displays. |
| LiquidCrystal_I2C_Hangul | A library for printing Hangul on I2C LCD displays. |
| LiquidMenu | Menu creation Arduino library for LCDs, wraps LiquidCrystal. |
| LitSwitch | A special library for an LED/momentary switch hardware combination. |
| LoRaNow | LoRaNow Library is a simple LoRa Node <> Gateway communication protocol. |
| LocoNet | Enables Digitrax LocoNet Communication |
| Low-Power | Lightweight power management library |
| LowPower_LowPowerLab | AVR & SAMD power management library |
| LSA08 | This library is for the Cytron Line Sensing Array: LSA08. |
| Lynxmotion Smart Servo -LSS- | A library that makes using the LSS simple. |
| mWebSockets | Simple to use implementation of WebSockets for microcontrollers |
| Marceau | This is a library that allows devices to be easily controlled over serial and websockets. |
| MatrixCharlieplex | A library for Arduino to control Charlieplexed LED matrices. |
| MAX6675 with hardware SPI | A library for MAX6675 thermocouple interface. |
| max7219 | Lightweight library for the MAX7219 7 segment 8 digit display |
| mbino | Port of mbed OS 2 APIs to the Arduino platform |
| MCP3202 | Used to interface the 12 bit ADC MCP3202 by Microchip. |
| MCP3221 | MCP3221 Driver (12-bit ADC with hardware I2C Interface) |
| MCP79412RTC | Arduino library for the Microchip MCP79411/12 Real-Time Clock/Calendar. |
| MCP9800 | Arduino Library for Microchip MCP9800/1/2/3 2-Wire High-Accuracy Temperature Sensors. |
| MCP9802 | MCP9802 Driver (12-BIT Temperature Sensor with I2C Interface) |
| MCP9808 | Arduino Library for Microchip MCP9808 Maximum Accuracy Digital Temperature Sensor. |
| MD_PWM | PWM on arbitrary pins |
| MD_SmartCar | Core functions for movement control of a 2 wheeled SmartCar Robot. |
| Melt7SegLcd | Melt 7-segment LCD Arduino library. |
| MemoryUsage | Use this library to check your SRAM / Stack memory usage. |
| MeteoLabBeacon | Arduino library for environmental sensor communication. |
| MFRC522 | Arduino RFID Library for MFRC522 (SPI) |
| MFRC522-spi-i2c-uart-async | Arduino RFID Library for MFRC522 (SPI, I2C and UART) with asynchroneous callbacks |
| MicroDebug | Arduino debugging support library |
| MicroTone | low-flash high-performance pulse train library with attiny13 |
| microgear-nbiot | NETPIE client library for BC95 NB-IOT module on Arduino platform. |
| MIDIcontroller | A library for creating Teensy MIDI controllers. |
| MideaIRWrapper | A library that makes, easier work with Midea Air Conditioners. |
| MIDIUSB | Allows an Arduino board with USB capabilites to act as a MIDI instrument over USB. |
| MINDSi | Code to assist with running MINDSi robots |
| MINDS-i-Drone | Code to assist with running MINDS-i Drones |
| Mirobot | This is the library that makes Mirobot (http://mirobot.io) work. |
| MMA7455 sensor Library | Freescale MMA7455 accelerometer sensor library |
| MMA8453_n0m1 | an Arduino Library for the Freescale MMA8453Q & MMA8452Q accelerometer. |
| MMA8653 | Allows reading the MMA8653 accelerometer. |
| MobaTools | Functions (steppers, servos, leds) for model railroaders( and for others too ) |
| ModbusRTU_Slave_RS485 | A library package for ARDUINO acting as ModBus slave communicating through UART-to-RS485 converter. Originally written by Geabong github user. Improved by Łukasz Ślusarczyk. |
| ModuleInterface | ModuleInterface is an open-source system for configuration of and data logging from Arduinos and similar devices. |
| Motor Driver Library | Motor Driver Library for Arduino Shields with L293D and 74HC595 |
| MotorVID28 | A library for controlling VID28 or equivalent stepper motors (BKA30D-R5, X25). |
| movingAvg | A simple Arduino library for calculating moving averages. |
| MPU6050 | MPU6050 Arduino Library. |
| MQUnifiedsensor | This library allows you to read the MQ sensors very easily. |
| msTask | Use hardware Timer1 to run tasks in time preset |
| MSGEQ7 | Library for Musicvisualization with MSGEQ7 |
| MSMPLOTTER | A library that can plot on Serial Monitor. |
| muTimer | Arduino library to easily use on/off delays and cycle timers with non-blocking functions. |
| MultiFunctionShield | LED Display driver for Multi Function Shield |
| MultiTrans | This library is an implementation of a multi channel transceiver (optionally via IR) |
| MultitapKeypad | A library (driver) for matrix 4x3 or 4x4 keypad supports multi-tap and long-tap. |
| MX1508 | A library that makes using mx1508 dual DC motor driver easier. |
| my92xx | MY9291 and MY9231 LED driver library for Arduino AVR and ESP8266 |
| N64Controller | Arduino library to connect a Nintendo 64 controller (N64 controller). |
| N64Pad | Interface with Nintendo 64/GameCube controllers |
| NanoPlayBoard | Enables easy access to the sensors and actuators of the Arduino NanoPlayBoard. |
| NeoGPS | NMEA and ublox GPS parser, configurable to use as few as 10 bytes of RAM |
| NeoHWSerial | NeoHWSerial for AVR |
| NeoPatterns | Patterns for NeoPixel strips and matrixes including the patterns of the NeoPattern example by Adafruit. |
| NeoSWSerial | An efficient replacement for SoftwareSerial at baud rates 9600, 19200 and 38400. |
| Neurona | Artificial Neural Network architectures for Arduino |
| NHB_AD7794 | Library for using the Analog Devices AD7794 6ch 24 bit precision analog converter IC |
| Nintendo | Connect all your favourite Nintendo Controllers to your Arduino. |
| NoDelay | Arduino library to make use of the Millis funtion for non Blocking Delays. |
| Nova Fitness Sds dust sensors library | A high-level abstaction over Sds sensors family |
| Nova_SDS011 Sensor Library | Nova SDS011 dust sensor library |
| NST1001 | NST1001 temperature sensor driver. |
| NVSRAM | Arduino library for Microchip 23LCV512 and 23LCV1024 NVSRAM. |
| OneWireNg | Arduino 1-wire service library. OneWire alternative. |
| OPC | A library for Arduino OPC Server support. |
| OpenDevice | OpenDevice is a set of tools and APIs to build solutions for the "Internet of Things" like home automations systems, robotics, smart city, energy monitoring, security, sensor monitoring |
| Opentherm | Arduino library to send and receive data from Opentherm devices. |
| OSFS | An Overly Simplified FileSystem for storing things, e.g. in the Arduino's EEPROM |
| Ospom | Ospom is FaceBook for your Arduino. |
| Parse Arduino SDK | A library that provides access to Parse |
| PCA9536 | PCA9536 Driver (4-Channel GPIO I2C Expander) |
| PCA9536_RGB | PCA9536 RGB LED Driver |
| PCM | Playback of short audio samples. |
| PF | Petit FatFS for Arduino avr MCUs. to drive SD cards |
| PGMWrap | A convenient library allowing structures and variables stored in PROGMEM to be read directly. |
| PHPoC | PHPoC Ethernet/WiFi Shield for Arduino |
| PHPoC Expansion | PHPoC Expansion library for Arduino |
| Pin | An easy to use Arduino library for fast and simultaneous operations on Arduino I/O pins. |
| PinChangeInterrupt | A simple & compact PinChangeInterrupt library for Arduino. |
| Pinduino | Infterface library for pinduino |
| ping-arduino | A messaging and device api for the Blue Robotics Ping1D echosounder |
| PJON | PJON is an open-source, multi-master, multi-media bus network protocol |
| PLS7 shield | Arduino shield with various I/O devices |
| PololuBuzzer | PololuBuzzer library for Arduino |
| PololuLedStrip | Arduino library for addressable RGB LED strips from Pololu |
| PololuMenu | Pololu library for simple LCD Menus. |
| PololuRPiSlave | Pololu Raspberry Pi I2C Slave Arduino library |
| Pololu3piPlus32U4 | Arduino library for the Pololu 3pi+ 32u4 Robot |
| PowerFlex4m | Abstraction layer for simple ModBus communications with PowerFlex 4m VFDs |
| PPMEncoder | A library to encode/generate a PPM signal for controlling RC Cars, etc... |
| PrinterDuino | The simplest library to print in paper using 3 axis |
| Printoo_Library | The library for the Printoo modules. |
| ProcessScheduler | An OOP multitasking library |
| programmable_air | Basic functions to control the Programmable-Air board. |
| PS2KeyAdvanced | PS2 keyboard FULL control and ALL keys processing, as well as LED control. |
| PS2KeyMap | PS2 keyboard codes from PS2KeyAdvanced to UTF-8 for any Latin language keyboard. |
| PS2KeyRaw | PS2 keyboard control and raw data receiving |
| ps2dev | Library to emulate PS2 keyboard/mouse using arduino |
| PulsePattern | Library to generate repeating pulse patterns. (AVR only) |
| PWMFreak | Configures the PWM frequency on a pin |
| PyDuinoBridge | A transparent library for communication between Python and Arduino. |
| RazorIMU_9DOF | This library is for the Razor AHRS 9DOF IMU by Sparkfun. |
| RBL_nRF8001 | An Arduino library for the nRF8001 products such as the BLE Shield and Blend. |
| RCReceiver | A library to add support for rc receivers. |
| rc-switch | Operate 433/315Mhz devices. |
| RC_ESC | A library to use ESC with the Arduino platform. |
| RCLSwitch | Compact version of RC Switch |
| retroTerm | A library for creating GUI-esque interfaces in a terminal emulator with a microcontroller. |
| RF24G | A simple way for up to 6 nRF24L01 radios to communicate with each other. |
| RhinoServo | This library is for the Encoder DC Servo Motor: RMCS220x. |
| RingBuf | A library for buffering items into a ring (circular/FIFO) buffer |
| RingBufCPP | A library for buffering items into a ring (circular/FIFO) buffer |
| RingEEPROM | The library increases the arduino EEPROM Write endurance |
| RMCS-220X | A library to facilitate the control of a Rhino RMCS-220X Servo Motor over i2c. |
| ROKduino | Allows control of Rokenbok Education ROKduino robotics system. |
| Robopoly Bluetooth | This library allows you to use the bluetooth module on the Robopoly Shield. |
| Robopoly Linear Camera | This library allows you to get data from the Robopoly Linear Camera. |
| Robopoly PRismino | This library allows you to use all the functions of the Robopoly PRismino and the Robopoly Shield. |
| Robopoly RomeEnco | This library allows you to read up to four encoders at the same time. |
| Robot Control | Enables easy access to the controls of the Arduino Robot Control board. For Arduino Robot only. |
| Robot IR Remote | Allows controlling the Arduino Robot via an IR remote control. For Arduino Robot only. |
| RobotLib | A robotics library to simplify implementing generic robotics hardware. |
| Robot Motor | Enables easy access to the motors of the Arduino Robot Motor board. For Arduino Robot only. |
| RokitSmart | A library for RokitSmart users |
| Romi32U4 | Romi 32U4 Arduino library |
| RoxMux | Collection of Multiplexer and Hardware Controllers. |
| RS485HwSerial | Enhanced Arduino serial library with RS485 transmit enable control. |
| RTCTimer | An Arduino library to easily perform scheduled tasks. |
| Rtc_Pcf8563 | A library that interfaces the Phillips PCF8563 Real Time Clock chip. |
| Rtttl | A library that plays Rtttl melodies |
| runner | A kind of shell for Arduino. |
| SCA100T | This library allows communication with Murata SCA100T inclinometer sensors using SPI. |
| SDI-12 | An Arduino library for SDI-12 communication with a wide variety of environmental sensors. |
| SDS011 sensor Library | Nova Fitness SDS011 dust sensor library |
| SDS011_vers | A library for NovaFitness SDS011 Particle Matter Sensor |
| SensorModbusMaster | Arduino library for communicating via modbus with the Arduino acting as master |
| SensorToButton | An algorithm to convert analog Data into a Button. |
| Servo | Allows Arduino/Genuino boards to control a variety of servo motors. |
| ServoEasing | Enables smooth servo movement. Linear as well as other (Cubic, Circular, Bounce, etc.) ease movements for servos are provided. The Arduino Servo library or PCA9685 servo expanders are supported. |
| Servo Hardware PWM | Allows Arduino/Genuino Mega boards to control up to 9 servos with the integrated 16-bit hardware PWM timer/counter. |
| SevenSeg4D | Library for driving a 4 digit 7segment LED display screen with 2 HC595 shift registers |
| SevenSegmentTM1637 | Library for using a 4 digit seven segment display with TM1636 or TM1637 driver IC |
| ShiftRegister-PWM-Library | Makes shift register pins PWM capable. |
| shift7seg | A library to simplify the use of 74hc595 serial in/parallel out shift registers as drivers for a 4 digit 7 segment display. |
| SimpleMotionV2-Arduino | An Arduino library for controlling SimpleMotion IONI/ARGON drives from Granite Devices. |
| Sleep_n0m1 | A library that sets the Arduino into sleep mode for a specified length of time, or until an interrupt |
| Sleepy Pi 2 | Arduino Library for Sleepy Pi 2 Raspberry Pi HAT |
| SmallSetup | Optimize the Arduino setup routines. |
| SmartMatrix | Drive HUB75 RGB Matrix Panels with High Quality Graphics from a Teensy 3, Teensy 4, or ESP32 |
| SmartRC-CC1101-Driver-Lib | Driver for cc1101. |
| Sodaq_PcInt | An Arduino library to deal with PCINT (Pin Change Interrupts) |
| Sodaq_wdt | An Arduino wrapper for the Watch Dog Timer. |
| SoftModem | Audio Jack Modem Library for Arduino. |
| SoftPWM | A software library to produce a 50 percent duty cycle PWM signal on arbitrary pins. |
| SoftwareReset | Allow to reset an arduino board from the sketch |
| Somfy_Remote_Lib | Control Somfy RTS devices |
| souliss | SmartHome Networking Framework |
| SoundPlayer | Allows Arduino Boards to play 8-bit sounds recorded at 40kHz sampling frequency. |
| SpacebrewYun | Enables the communication between interactive objects using WebSockets. For Arduino Yún only. |
| SparkFun Graphic LCD Serial Backpack | Library containing functions for SparkFun Graphic LCD Serial Backpack |
| SparkFun Quadstepper Motor Driver | 4-axis stepper motor driver, available from SparkFun Electronics |
| SparkFun TLC5940 | Library for the TLC5940 IC. |
| Sparkfun T5403 Barometric Sensor Library | Arduino Library for interfacing with the T5403 Barometric sensor. |
| SpheroRVR | This library allows you to communicate with a Sphero RVR using an Arduino Uno. |
| SPI-DAC7611 | A library that interfaces with the DAC7611 using the standard SPI library. |
| SPIMemory | SPI Memory library for Arduino. (Formerly SPIFlash) |
| SpinWearables | A small, colorful, programmable, wearable kit to facilitate student exploration of physics, engineering, and computer science. |
| SST25VF | Arduino Library for controlling the SST Nor Serial Flash SST25VF family. |
| StepperControl | Stepper Motor Controller for 28BYJ-48. |
| StereoSID | MOS6581 Stereo SID Emulator Arduino Library |
| StivSeg | Multi-digit seven-segment display library for arduino. |
| STM32duino ASM330LHH | Automotive inertial measurement unit. |
| STM32duino HTS221 | Capacitive digital sensor for relative humidity and temperature. |
| STM32duino IIS2MDC | Ultra Low Power 3D magnetometer. |
| STM32duino ISM330DLC | 3D accelerometer and 3D gyroscope. |
| STM32duino LIS2DW12 | Ultra Low Power 3D accelerometer. |
| STM32duino LIS2MDL | Ultra Low Power 3D magnetometer. |
| STM32duino LIS3MDL | High-performance 3D magnetometer. |
| STM32duino LPS22HB | 260-1260 hPa absolute digital output barometer. |
| STM32duino LPS22HH | Nano pressure sensor. |
| STM32duino LPS25HB | 260-1260 hPa absolute digital output barometer. |
| STM32duino LSM303AGR | 3D accelerometer and 3D magnetometer. |
| STM32duino LSM6DS0 | 3D accelerometer and 3D gyroscope. |
| STM32duino LSM6DS3 | 3D accelerometer and 3D gyroscope. |
| STM32duino LSM6DSL | 3D accelerometer and 3D gyroscope. |
| STM32duino LSM6DSO | Ultra Low Power inertial measurement unit. |
| STM32duino LSM6DSOX | Ultra Low Power inertial measurement unit. |
| STM32duino LSM6DSR | iNEMO inertial measurement unit. |
| STM32duino Proximity Gesture | Allows performing simple gestures detection using proximity sensors |
| STM32duino ST25DV | Allows controlling the NFC ST25DV |
| STM32duino STTS22H | digital temperature sensor. |
| STM32duino STTS751 | digital temperature sensor. |
| STM32duino VL53L1X | Allows controlling the VL53L1X (Time-of-Flight and gesture detection sensor) |
| STM32duino VL6180X | Allows controlling the VL6180X (proximity and ambient light sensing (ALS) sensor) |
| STM32duino X-NUCLEO-53L1A1 | Allows controlling the VL53L1X sensors on board of X-NUCLEO-53L1A1 |
| STM32duino X-NUCLEO-6180XA1 | Allows controlling the VL6180X sensors on board of X-NUCLEO-6180XA1 |
| STM32duino X-NUCLEO-IKS01A3 | Allows controlling the ST X-NUCLEO-IKS01A3 expansion board |
| STM32duino X-NUCLEO-NFC04A1 | Allows controlling the ST X-NUCLEO-NFC04A1 expansion board |
| Strawbees Quirkbot | Allows you to program Quirkbots. |
| SuplaDevice | Library enables you to connect the device to the SUPLA automation system. |
| SwissHandmade MiniPirate | Commandline for GPIO, I2C and CPU manipulations |
| Switch | Arduino library for deglitching and debouncing switches and buttons. |
| Syncano Arduino Library | A library that provides access to Syncano |
| TVout | A library for generating PAL or NTSC video output with an AVR. |
| TA6932 | TA6932 library - 7 segments display IC |
| TactNecklace | Arduino Library receives acceleration data from acclerometer, outputting a signal of varying srength to the vibrators |
| TactileSwitch | class for tactile switch |
| Talk2 | Library for the Talk2 Boards. |
| Talkie | Speech library for Arduino. Generates speech from a fixed vocabulary encoded with LPC. |
| Taskrunner | Allows arduino to run scheduler which can run functions at specific frequency |
| TCA6416A | Arduino library for operating TCA6416A. |
| Technoshield-ui-lib | Technoshield User Interface API. |
| TEE UC20 Shield | Library for Quectel UC20 3G Shield and Quectel UC15 3G Module for Arduino Board. |
| Telit GE910 GSM Library | Telit GE910 GSM/GPRS network connection library for Arduino controllers. |
| TheThingsNode | The Things Node Arduino Library. |
| ThermistorLibrary | This library allows you to read the thermistors very easily. |
| ThinSat Program TSLPB Library | A driver library for the Twiggs Space Lab Payload Board |
| ThingSpeak | ThingSpeak Communication Library for Arduino, ESP8266 & EPS32 |
| ThingSpeak_asukiaaa | An API manager for ThingSpeak |
| Thread | Simplest kernel for multythreading. |
| TimeInterrupt | Allows for timer interrupts on various platforms. |
| TimedPID | PID controller |
| TimerFa | Software Timer |
| TimerFive | Use hardware Timer5 for finer PWM control and/or running an periodic interrupt function |
| TimerFour | Use hardware Timer4 for finer PWM control and/or running an periodic interrupt function |
| TimerFour32u4 | Allow usage of the 10-bit hardware high speed Timer4 on ATMega16u4 and ATMega32u4. |
| TimerInterrupt | This library enables you to use Interrupt from Hardware Timers on an Arduino, Adafruit or Sparkfun AVR board, such as Nano, UNO, Mega, Leonardo, YUN, Teensy, Feather_32u4, Feather_328P, Pro Micro, etc. |
| TimerOne | Use hardware Timer1 for finer PWM control and/or running an periodic interrupt function |
| TimerThree | Use hardware Timer3 for finer PWM control and/or running an periodic interrupt function |
| Timezone | Arduino library to facilitate time zone conversions and automatic daylight saving (summer) time adjustments. |
| TinySnore | Library for putting ATtiny25/45/85 to timed sleep in one line of code! |
| tinySPI | tinySPI is an Arduino SPI master library for ATtiny24/44/84, 25/45/85, 261/461/861, 2313/4313 MCUs. |
| TinySuite | A collection of tools for ATTiny85 |
| TMRpcm | PCM/WAV Audio playback |
| TM1638lite | Interface library from Arduino to TM1638 display chip/card |
| TMCStepper | Arduino library for Trinamic stepper drivers |
| TMC2130Stepper | Arduino library for Trinamic TMC2130 stepper drivers |
| TMC2208Stepper | Arduino library for Trinamic TMC2208 stepper drivers |
| Tone | A software digital square wave tone generation library. |
| toneAC | Replacement to the standard tone library with many advantages |
| ToneLibrary | This is an Arduino Library to produce a tone on any Arduino pin. |
| TouchWheel | Capacitive touch wheels and sliders using only 2-3 analog pins! |
| TriacDimmer | A library for controlling a triac dimmer. |
| Tsunami | Library for interfacing with the Tsunami's hardware peripherals. |
| Tuyav | Communicate with the Tuya IoT module |
| TwiLiquidCrytal by Arnakazim | A library to interface an HD44780 based LCD via I2C (or TWI in Arduino terms). |
| uArmLibrary | uArm Library for Arduino |
| uMT | Micro Multi Tasker specifically designed for ARDUINO UNO, MEGA and DUE boards. |
| uMulti | Cooperative multitasking for the AVR line of microcontrollers. |
| U8glib | A library for monochrome TFTs and OLEDs |
| UARDECS Library | A library that provides communication functions conforming to UECS, a common standard for horticulture in Japan. |
| UARDECS_MEGA Library | A library that provides communication functions conforming to UECS, a common standard for horticulture in Japan. |
| Ufox | Ufox devkit Sigfox RC4. |
| UKESF Sixth-Formers | Examples and libraries for the UKESF sixth-formers guide. |
| UltraSonic_Lib | A library for UltraSonic distance sensor. |
| UMIRobot | UMIRobot library for Arduino. |
| Uno WiFi Developer Edition Serial1 | Implements Serial1 of Arduino Uno WiFi Developer Edition board to access the on-board ESP8266 |
| USBStatus | Allows an Atmega32u4 based Arduino board to detect if the host, it is connected to, is active or shut down. |
| USBMIDI | USB MIDI library for Arduino. |
| USIWire | USI based TWI/I2C library for Arduino |
| VariableTimedAction | A library for creating timed events/actions. |
| vbus-arduino | Allows arduino to read data from some vbus compatible controllers. |
| Vcc | Measure supply voltage (using optinally stored calibration value) |
| VGAX | VGA signal generator for UNO and MEGA |
| VGAXUA | VGA UART signal generator for UNO and MEGA |
| VitconCommon | A library package commonly used by the other libraries being published by vitcon |
| VitconIOT | A library for interfacing arduino device with VITCON IoT service. |
| VitconLink | A library package for interfacing the microcontroller with VITCON Link modules. |
| VitconMQTT | A library for interfacing arduino-based device with MQTT using VITCON WIFI-LINK. |
| VivicoreSerial | Library to talk with VIVIWARE Cell Core. |
| VNH3SP30 | Library for the VNH3SP30 and VNH5019A-E motor controllers (H-bridge motor driver) |
| Volume | Gives tone functionality with 8 bit volume control with no extra parts |
| Volume 3 | Gives tone functionality with 10-bit volume control with no extra parts! |
| Volume2 | Gives tone() functionality with multiple waveforms and 8-bit volume control - with no extra parts! |
| VS1053 for use with SdFat | Device library interfacing VS1053 MP3 player chip to Sd Card. |
| VSCP | Very Simple Control Protocol L1 framework for all Arduino boards. |
| Watch | A library that makes working with watch-like formats easy. |
| WatchDog | WatchDog Timer Functions |
| Watchdog | Watchdog resets the device if the timer expires before the watchdog is reset. |
| WaveHC | WaveHC wave shield library |
| WearLeveling | EEPROMWearLevel reduces EEPROM wear by writting a new value to an other EEPROM location. |
| WiFiSpi | Arduino WiFi library connecting ESP8266 via SPI protocol |
| wpi-32u4-library | Forked Romi 32U4 Arduino library |
| WPI430-VMA430 GPS | Velleman WPI430-VMA430 GPS module library |
| xbee_serial_array | sends and receive string data in mode api with variable length. |
| XLR8ADC | Arduino library to take advantage of XLR8 ADC performance. |
| XLR8AddrPack | Arduino header file defining addresses common to the XLR8 family. |
| XLR8BuildTemplate | Template for building custom designs for XLR8 |
| XLR8Core | OpenXLR8 Core components |
| XLR8DMem | Access library for XLR8 DMem XB |
| XLR8DigitalIO | Arduino library for access to the extra pins available on an XLR8 Snō. |
| XLR8Float | Arduino library for hardware accelerated floating point math. |
| XLR8HardwareSerial | Library to access UART XBs. |
| XLR8Info | Arduino library for identifying features of XLR8 product |
| XLR8LFSR | Simple LFSR example on the XLR8 FPGA. |
| XLR8NeoPixel | Arduino library for controlling single-wire-based LED pixels and strip. |
| XLR8PID | Arduino library for hardware accelerated PID control. |
| XLR8Pong | Pong game using the FPGA logic. For Alorium Technology's XLR8 board. |
| XLR8PWM | OpenXLR8 implementation of PWM |
| XLR8Quadrature | Arduino library for hardware accelerated quadrature encoder control. |
| XLR8RC | Captures outputs from an RC receiver (the signals that go to servos) and outputs a 16 bit integer representing the pulse width (in microseconds) |
| XLR8Servo | Allows Arduino boards to control a variety of servo motors. For Alorium Technology's XLR8 board. |
| XLR8SPI | Library to use SPI interfaces through SPI XBs. |
| XLR8USB | USB FullSpeed (Mouse) host interface |
| XLR8Wire | Library to access I2C XBs. |
| Yet Another Arduino PcInt Library | A library to support Pin Change Interruptions (PCINT) on AVR Arduinos |
| YosemitechModbus | Arduino library for communication with Yosemitech sensors via Modbus. |
| ZumoAutomation | Arduino library to allow for automatic zumo match play |
| ZumoShield | Arduino library for the Pololu Zumo Shield and Zumo robot kit for Arduino |
| Zumo32U4 | Zumo 32U4 Arduino library |