final-countdown/hardware/index.js

const { TempSensor, Channel } = require('./sensor')
const { Controller } = require('./controller')
const { Scanner } = require('./scanner')

const unitScale = {
    dC: { unit: 'degree', scale: 'celcius' },
    dF: { unit: 'degree', scale: 'fahrenheit' },
    mV: { unit: 'volt', scale: 'millivolt' },
    V: { unit: 'volt', scale: 'volt' }
}

/**
 * Create a sensor and readout channel as -67 to 257 degrees fahrenheit
 */
const tempController = new Controller({
    type: 'temp',
    channel: new Channel({ name: 'temperature_channel_00', min: -67, max: 257, interval: 10, unit: unitScale.dF.unit, scale: unitScale.dF.scale }),
    sensor: new TempSensor({ name: 'temperature_sensor_00', min: -67, max: 257, interval: 10, unit: unitScale.dF.unit, scale: unitScale.dF.scale })
})
console.log(tempController.readout) // { value: 78, unit: 'degrees' scale: 'fahrenheit' }

/**
 * Create a 0-5v sensor and interpolate readout as -67 to 257 degrees fahrenheit
 */
const manualTempController = new Controller({
    type: 'temp',
    channel: new Channel({ name: 'temperature_channel_01', min: -67, max: 257, interval: 10, unit: unitScale.dF.unit, scale: unitScale.dF.scale }),
    sensor: new TempSensor({ name: 'temperature_sensor_01', min: 0, max: 5, interval: 100, unit: unitScale.mV.unit, scale: unitScale.mV.scale })
})
console.log(manualTempController.readout) // { value: 78, unit: 'degrees' scale: 'fahrenheit' }

/**
 * A Scanner is made up of controllers
 * A Controller is made up of an output Channel and input Sensor
 */
const mySystem = new Scanner({ controllers: [ tempController, manualTempController ] })
console.log(mySystem.readAll()) 
/**
 * Example: console.log(mySystem.readAll()) 
 * temperature_channel_00: Reading({ value: 78, unit: 'degrees' scale: 'fahrenheit' }),
 * temperature_channel_01: Reading({ value: 78, unit: 'degrees' scale: 'fahrenheit' }), 
 */ 

module.exports = {
    unitScale
}