Javascript

for Tessel

What is TESSEL ?

What can tessel do ?

ambient

climate

camera

More modules

GPS

InfraRed

MicroSD

InfraRed

More modules

RFID

SERVO

Relay

Tessel code

var tessel = require('tessel');
var servolib = require('servo-pca9685'); 
var servo = servolib.use(tessel.port['A']);
var servo1 = 1; // We have a servo plugged in at position 1

servo.on('ready', function () {
  var position = 0;  
  servo.configure(servo1, 0.05, 0.12, function () {
    setInterval(function () {      servo.move(servo1, position);

      // Increment by 10% (~18 deg for a normal servo)
      position += 0.1;
      if (position > 1) {
        position = 0; // Reset servo position
      }
    }, 500); // Every 500 milliseconds
  });
});

TESSEL uses nodejs

to control modules

WHAT IS NODEJS ?

NODEJS is JAVASCRIPT

javascript

introduction

Variable

var size = 10

var name = "Alex"

Function


function rotateMotor(value) {
  // rotate motor to a direction
  var motor = new Motor('A');
  var newvalue = motor.rotate(value);  return newvalue;
}

object

 var student = {
    name: 'Alex',
    grade: 6
}

var currentDate = new Date();

operator

math operator: 

  + 

  - 

  * 

  / 

assignment: 

  = 

  !=

operator

 comparison:  >
 <

 ==
 >= <=
 logical ! && ||

logic control

 
if (condition) {

} else {

}


while (condition) {
}


for (var i = 0; i < 10; i++ {

}

module

var servolib = require('servo-pca9685'); 

var servolib = require('servo-pca9685');

var servo = servolib.use(tessel.port['A']);


servo.on('ready', function () {
    // do servo operation
});