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 LC | Teensy 3.x |
|---|---|---|---|---|---|---|---|
| GLCD (ks0108) | 2 |
Graphics LCD library - Use a 128x64 graphical LCD. Displays fonts, bitmaps, pixels, lines, circles.
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Yes | Yes | ||
| LiquidCrystal | 1.0.3 | 
Character type LCD library. Displays text and limited custom characters.
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Yes | Yes | Yes | |
| SSD1306 | Adafruit small OLED displays | |
Yes | Yes | Yes | Yes | |
| ST7735 | Adafruit 1.8 inch (128x160) color TFT LCD display | |
? | ? | Yes | ||
| OctoWS2811 | 1.0 | Control thousands of WS2811-based LEDs. | |
No | No | No | Yes |
| FastLED | Efficiently control many types of LED strips. | |
Yes | Yes | Yes | Yes | |
| Matrix & Sprite | 1.0 | 
Control many LEDs.
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Yes | Yes | Yes | |
| LedDisplay | 0.4 |
Very bright 4 or 8 character display.
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Yes | Yes | Yes | |
| LedControl | - | 
Control 7-segment display or LEDs.
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Yes | Yes | Yes | Yes |
| DogLcd | 1.0.0 | 
Use DOG-M Displays with only 4 pins
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Yes | Yes | Yes | |
| ST7565 | - | 
Graphical LCD, 128x64 |
|
Yes | Yes | Yes | Yes |
Communication Libraries | |||||||
| Library | Version | Description | Web | Teensy 2.0 | Teensy++ 2.0 | Teensy LC | Teensy 3.x |
| 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 | Yes |
| AltSoftSerial | 1.2 | Serial port emulated by software | |
Yes | Yes | No | Yes |
| NewSoftSerial | 10c | Serial port emulated by software | |
Yes | Yes | No | No |
| SoftwareSerial | 0018 | Known bugs - use NewSoftSerial | |
Yes | Yes | Partial | Partial |
| MIDI | 2.6 3.2 |
Control & Communicate with Musical Instruments |
|
Yes | Yes | Yes | |
| PS2Keyboard | 2.4 | 
PS2 Keyboard for user input
|
|
Yes | Yes | Yes | Yes |
| DmxSimple | 3 | DMX lighting control - | |
Yes | Yes | No | Yes |
| Firmata | 1.0.3 | Control hardware from Flash, Max/MSP, Puredata, etc | |
Yes | Yes | Yes | Yes |
| Wire | 1.0.3 | Communicate with I2C (2 wire) devices | |
Yes | Yes | Yes | Yes |
| SPI | 1.0 | Communicate with SPI devices | |
Yes | Yes | Yes | Yes |
| OneWire | 2.2 | Communicate with Maxim/Dallas 1-wire devices | |
Yes | Yes | Yes | Yes |
| XBee | 0.4 | Communicate using XBee wireless modules | |
Yes | Yes | Yes | |
| VirtualWire | 1.15 | Very Cheap Wireless Communication | |
Yes | Yes | Yes | |
| X10 | 0.4 | 
Control X10 AC Power Devices |
|
Yes | Yes | ||
| IRremote | 0.11 |  Infrared Remote Control, Send & Receive |
|
Yes | Yes | Yes | Yes |
| iPodSerial | |
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| TinyGPS | 12 | 
Process GPS data into useful variables, Latitude, Longitude, Time, etc |
|
Yes | Yes | Yes | Yes |
| USBHostShield | 1.0 & 2.0 | Connect other USB devices. | |
Yes | Yes | No | |
| CmdMessenger | Send messages between boards using serial | |
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Input and Sensor Libraries | |||||||
| Library | Version | Description | Web | Teensy 2.0 | Teensy++ 2.0 | Teensy LC | Teensy 3.x |
| Bounce | 1.5 | Reliably read pushbuttons or mechanical sensors with contact chatter | |
Yes | Yes | Yes | Yes |
| Keypad | 3.1 | Read Keypads with Row-Column Wiring | |
Yes | Yes | Yes | Yes |
| Encoder | 1.1 | Use Quadrature Encoder Position/Rotation Sensors | |
Yes | Yes | Yes | Yes |
| DallasTemperature | 3.4.0 | |
Yes | ||||
| MAX6675 | 1.1 | Thermocouples (high temperature measurement) | |
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| Ping | 2.0 | Ultrasonic Distance Measurement | |
Yes | Yes | Yes | Yes |
| CapacitiveSensor | 05 | Create Sensors That Can Detect Touch or Proximity | |
Yes | Yes | Yes | |
| FreqCount | 1.1 | Frequency Measurement, best for 1 kHz to 5 MHz range | |
Yes | Yes | Yes | Yes |
| FreqMeasure | 1.1 | Frequency Measurement, best for 0.1 Hz to 1 kHz range | |
Yes | Yes | Yes | Yes |
| SensorLib | CdS light, Audio Mic, PIR Motion Sensors | |
Yes | Yes | |||
| TouchScreen | Use glass touch sensitive screens | |
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Device Control and Signal Output Libraries | |||||||
| Library | Version | Description | Web | Teensy 2.0 | Teensy++ 2.0 | Teensy LC | Teensy 3.x |
| Servo | 1.0.3 | Control servo motors, commonly used in remote control planes | |
Yes | Yes | Yes | Yes |
| Stepper | 1.0.4 | Control stepper motors, which make slow & precise movement easy | |
Yes | Yes | Yes | Yes |
| AccelStepper | 1.30 | Control stepper motors, with many extra features beyond the Stepper library | |
Yes | Yes | Yes | |
| PID | |
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| DDS Sinewave | |
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| FrequencyTimer2 | 2.1 | Create a zero jitter output frequency | |
No | Yes | No | Yes |
| Tlc5940 | r014 | 
16 or more 12 bit PWM outputs
|
|
Yes | Yes | No | Yes |
| SoftPWM | 0005 | Additional PWM outputs on any pins | |
Yes | Yes | Yes | Yes |
| ShiftPWM | Additional PWM outputs with shift registers | |
Yes | Yes | Yes | Yes | |
| RgbLed | Control RGB LEDs | |
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| TV Out | Video Signal Output | |
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| MCP4728 | Four 12 bit Analog Outputs | |
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Timing and Time Keeping Libraries | |||||||
| Library | Version | Description | Web | Teensy 2.0 | Teensy++ 2.0 | Teensy LC | Teensy 3.x |
| Time | Time keeping, Date & Time, and sync to other sources. | |
Yes | Yes | Yes | Yes | |
| TimeAlarms | Run functions at specific times. | |
Yes | 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 | Yes |
| TimerOne | Use Timer1 to run a function and control PWM signals | |
Yes | Yes | Yes | Yes | |
| MsTimer2 | 0.7 | Run a function every millisecond. | |
Yes | Yes | Yes | Yes |
| FlexiTimer2 | Run a function on a configurable interval. | |
Yes | Yes | Yes | ||
| TimerThree | Use Timer3 to run a function and control PWM signals | |
Yes | Yes | 3.1 | ||
Data Manipulation Libraries | |||||||
| Library | Version | Description | Web | Teensy 2.0 | Teensy++ 2.0 | Teensy LC | Teensy 3.x |
| EEPROM | 1.0.4 | Non-volatile (permanent) data storage | |
Yes | Yes | Yes | |
| SD | |
Yes | Yes | Yes | Yes | ||
| SdFat | 20100611 | |
Yes | Yes | Yes | ||
| Flash | |
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| TextString | |
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| PString | |
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| Streaming | |
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| Base64 | Encode binary into base-64, and vise-versa. | |
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| Entropy | 0.7.2 | Generate truly random numbers (also RNGA on Teensy 3.5 & 3.6) | |
Yes | Yes | Yes | Yes |
"Alt" indicates the library's functionality is available from other functions. See the library page for details.