npm install accel-mma84
View library on Github → MMA8452Q datasheet

 Accelerometer

Detect orientation and movement of your Tessel by measuring gravity / acceleration.

Control by tilt!

• 3-Axis Digital Accelerometer
• 12-bit resolution
• Selectable ±2g/±4g/±8g scales

var accel = require('accel-mma84')
  .connect(tessel.port('a'), function () {
    // Request acceleration measurement.
    accel.getAcceleration(function (err, xyz) {
      console.log(xyz); // { x: 0.0, y: 0.0, z: 1.0 }
    });
  });

LIBRARY COMING SOON

 Ambient Light + Sound

The Ambient sensor can detect ambient light and sound levels.

Clap to turn on the TV (paired with infrared) or know from a webapp if the lights are on at home.

• The microphone is optimized for detecting the ambient noise level in a room or building a sound-activated device.
• The ambient light sensor and can be used for detecting fine-grain brightness in a room.

npm install climate-si7005View library on Github → Si7005 datasheet

 Climate

Detect humidity and temperature from your environment.

Monitor your plants or exotic pets. Pull weather data from the internet and replicate a climate by hooking up relays to fan/heater/humidifiers.

• Measure 0 to 70 °C (32 to 160 °F) with ±1° accuracy
• Measure 0% to 80% relative humidity

var climate = require('climate-s17005')
  .connect(tessel.port('a'), function () {
    // Read temperature in Fahrenheit & humidity
    climate.readTemperature('f', function (err, temp) {
      climate.readHumidity(function (err, humid) {
        console.log('Degrees:', temp.toFixed(4) + 'F',
          'Humidity:', humid.toFixed(4) + '%RH');
      });
    });
  });

LIBRARY COMING SOON IR Receiver IR LED

 Infrared

The Infrared (IR) Module can send and detect IR signals.

Use a Tessel as a remote for your TV, radio, or even another Tessel.

• Transmits and receives from 30+ feet (line of sight)
• Detects max 38kHz

LIBRARY COMING SOON SD Card standard

 MicroSD Card

Reads high-density media from microSD cards.

Store pictures or other data locally on your Tessel.

• Reads / writes microSD cards
• Module ships with a 1GB card

var sd = require('sdcard')
  .connect(tessel.port('a'), function () {
    // Copy from "from.txt" to "to.txt"
    sd.createReadStream('/from.txt')
      .pipe(sd.createWriteStream('/to.txt'));
  })

LIBRARY COMING SOONIM48DGR datasheet

 Relay

Control high-current devices, such as power cords and appliances.

Turn your coffee maker on when the Ambient module detects light, or based on input from an app.

• Rated for 240V and 5A
• AC or DC current
• Secure and remove wires with the help of a ballpoint pen. No more loose wires or screwdrivers.

var tessel = require('tessel');
var relays = require('relay-im48dgr')
  .connect(tessel.port('a'), function () {
    setTimeout(function () {
      setInterval(function () {
        relays.enable(1);
        relays.disable(2);
      }, 1000);
    }, 500);
    setInterval(function () {
      relays.disable(1);
      relays.enable(2);
    }, 500);
  });

npm install servo-pca9685
View library on Github → PCA9385 datasheet

 Servo

Control up to 16 hobbyist/RC servos.

Make it move! Control locks, wheels, cords, or anything else you can think of.

• Standard PWM output is compatible with servos of all sizes
• Takes a separate barrel jack power connection (included with US shipments)
• Comes with anES3001 YinYan Servoand a 5V external power jack (US-style plug)
• Can also be used as an LED driver.

var servos = require('servo-pca9685')
  .connect(tessel.port('a'), function () {
    // Rotate servo #1 to 180 degrees.
    servos.moveServo(1, 180);
  });