time-value-actions

Let me know if you have a better name for this module!

Install

$ npm install time-value-actions

Example

const TVA = require('time-value-actions');

const Engine = TVA.Engine;

const SequenceAction = TVA.Actions.Sequence;
const SquarewaveAction = TVA.Actions.Squarewave;
const SinewaveAction = TVA.Actions.Sinewave;
const TimedAction = TVA.Actions.Timed;

// squarewave that oscillates between 20 and 50 every second, starts at the low value
const squarewave = new SquarewaveAction(50, 20, 1 * 1000, false);
// sinewave that oscillates between 20 and 50 with a period of 2 seconds, no offset
const sinewave = new SinewaveAction(50, 20, 2 * 1000, 0);

// Sequence action allows chaining actions together, repeats indefinitely
const sequence = new SequenceAction([
  new TimedAction(5 * 1000, squarewave), // squarewave for 5 seconds
  new TimedAction(2 * 1000), // delay for 2 seconds
  new TimedAction(5 * 1000, sinewave) // sinewave for 5 seoncds
]);

sequence.on('value', function(value) {
  // do something with the value
  console.log(value);
});

const engine = new Engine({milliseconds: 100});

engine.start([sequence]);

Use Cases

• Pair with a driver to control extruder RPMs to create custom purge procedures

Documentation

Engine

Activates and 'ticks' actions.

Methods

new Engine(options)

• options
• milliseconds Period of each tick in milliseconds

Action

Emits values based on time.

Methods

activate(time)

Use to initialize the action.

active(time)

Must return either 0 or 1.

• 0: not active
• 1: active

tick(time)

Used to emit and return value.

Events

'value'

• value
  • the value emitted
• time
  • the time the value was emitted

Sinewave Action

Emits values that make a sinewave.

Constructor

new Sinewave(high, low, period, offset)

• high
  • high value for sinewave
• low
  • low value for sinewave
• period
  • period of sinewave in milliseconds
• offset
  • offset of sinewave in milliseconds