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PJRC Store  Teensy 3.0, $19  Teensy 2.0, $16  Teensy++ 2.0, $24  USB Cable, $4 Teensy  Main Page  Getting Started  How-To Tips  Code Library  Projects  Teensyduino  Main  Tutorial  Download+Install  Basic Usage  Digital I/O  PWM & Tone  Timing  USB Serial  USB Keyboard  USB Mouse  USB Joystick  USB MIDI  USB Flight Sim  UART Serial  Libraries  Main List  GLCD  LiquidCrystal  OctoWS2811  Matrix/Sprite  LedDisplay  LedControl  DogLcd  ST7565  AltSoftSerial  NewSoftSerial  SoftwareSerial  MIDI  PS2Keyboard  DmxSimple  Firmata  Wire  SPI  OneWire  XBee  VirtualWire  X10  IRremote  TinyGPS  USBHostShield  Ethernet  Bounce  Keypad  Encoder  Ping  CapacitiveSensor  FreqCount  FreqMeasure  Servo  Stepper  AccelStepper  FrequencyTimer2  Tlc5940  SoftPWM  ShiftPWM  Time  TimeAlarms  DS1307RTC  Metro  TimerOne  MsTimer2  EEPROM  Reference

Libraries Most code libraries designed for Arduino boards work on Teensy and Teensy++ with little or no modification. This page aims to collect all libraries with any modifications and special instructions specific to Teensy. Clearly, many libraries have yet to be tested.... Display Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 GLCD (ks0108) 2 Graphics LCD library - Use a 128x64 graphical LCD. Displays fonts, bitmaps, pixels, lines, circles. Yes Yes LiquidCrystal 1.0.3 Character type LCD library. Displays text and limited custom characters. Yes Yes Yes OctoWS2811 1.0 Control thousands of WS2811-based LEDs. No No Yes FastSPI_LED Efficiently control various types of LED strips. Yes Yes Partial Matrix & Sprite 1.0 Control many LEDs. Yes Yes Yes LedDisplay 0.4 Very bright 4 or 8 character display. Yes Yes Yes LedControl - Control 7-segment display or LEDs. Yes Yes Yes DogLcd 1.0.0 Use DOG-M Displays with only 4 pins Yes Yes Yes Dogm128 1.1.2 Use DogM 128 and similar Graphical Displays ST7565 - Graphical LCD, 128x64 Yes Yes Yes Communication Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 Ethernet 1.0.4 Connect to the Internet or a local Ethernet network. Ethernet allows you to create Internet applications like web servers. Yes Yes Yes AltSoftSerial 1 Serial port emulated by software Yes Yes No NewSoftSerial 10c Serial port emulated by software Yes Yes No SoftwareSerial 0018 Known bugs - use NewSoftSerial Yes Yes No MIDI 2.6 3.1.1 Control & Communicate with Musical Instruments Yes Yes PS2Keyboard 2.4 PS2 Keyboard for user input Yes Yes Yes DmxSimple 3 DMX lighting control - No Yes Firmata 1.0.3 Control hardware from Flash, Max/MSP, Puredata, etc Yes Yes Yes Wire 1.0.3 Communicate with I2C (2 wire) devices Yes Yes Yes SPI 1.0 Communicate with SPI devices Yes Yes Yes OneWire 2.2 Communicate with Maxim/Dallas 1-wire devices Yes Yes Yes XBee 0.2.1 Communicate using XBee wireless modules Yes Yes VirtualWire 1.5 Very Cheap Wireless Communication Yes Yes No X10 0.4 Control X10 AC Power Devices Yes Yes IRremote 0.11 Infrared Remote Control, Send & Receive Yes Yes Yes iPodSerial TinyGPS 12 Process GPS data into useful variables, Latitude, Longitude, Time, etc Yes Yes Yes USBHostShield 1.0 & 2.0 Connect other USB devices. Yes Yes No CmdMessenger Send messages between boards using serial Input and Sensor Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 Bounce 1.5 Reliably read pushbuttons or mechanical sensors with contact chatter Yes Yes Yes Keypad 3.1 Read Keypads with Row-Column Wiring Yes Yes Yes Encoder 1.1 Use Quadrature Encoder Position/Rotation Sensors Yes Yes Yes DallasTemperature 3.4.0 Yes MAX6675 1.1 Thermocouples (high temperature measurement) Ping 2.0 Ultrasonic Distance Measurement Yes Yes Yes CapacitiveSensor 04 Create Sensors That Can Detect Touch or Proximity Yes Yes FreqCount 1.0 Frequency Measurement, best for 1 kHz to 5 MHz range Yes Yes No FreqMeasure 1.0 Frequency Measurement, best for 0.1 Hz to 1 kHz range Yes Yes No SensorLib CdS light, Audio Mic, PIR Motion Sensors Yes Yes TouchScreen Use glass touch sensitive screens Device Control and Signal Output Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 Servo 1.0.3 Control servo motors, commonly used in remote control planes Yes Yes Yes Stepper 1.0.4 Control stepper motors, which make slow & precise movement easy Yes Yes Yes AccelStepper 1.30 Control stepper motors, with many extra features beyond the Stepper library Yes Yes Yes PID DDS Sinewave FrequencyTimer2 2 Create a zero jitter output frequency No Yes Alt Tlc5940 r014 16 or more 12 bit PWM outputs Yes Yes No SoftPWM 0003 Additional PWM outputs on any pins Yes Yes ShiftPWM 1.03 Additional PWM outputs with shift registers Yes Yes No RgbLed Control RGB LEDs TV Out Video Signal Output MCP4728 Four 12 bit Analog Outputs Timing and Time Keeping Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 Time Time keeping, Date & Time, and sync to other sources. Yes Yes Yes TimeAlarms Run functions at specific times. Yes Yes Yes DS1307RTC Access a DS1307 Real Time Clock Yes Yes Yes Metro 2.3.2 Schedule events to occur at regular intervals. Yes Yes Yes TimerOne Use Timer1 to run a function and control PWM signals Yes Yes MsTimer2 0.6 Run a function every millisecond. Yes Yes FlexiTimer2 Run a function on a configurable interval. Yes Yes TimerThree Use Timer3 to run a function and control PWM signals Yes Yes Data Manipulation Libraries Library Version Description Web Teensy 2.0 Teensy++ 2.0 Teensy 3.0 EEPROM 1.0.4 Non-volatile (permanent) data storage Yes Yes Yes SD Yes Yes Yes SdFat 20100611 Yes Yes Flash TextString PString Streaming Base64 Encode binary into base-64, and vise-versa. Entropy 0.6 Generate truly random numbers Yes Yes "Alt" indicates the library's functionality is available from other functions. See the library page for details.