creatures

This is a “Things” simulator (think IOT)

See it in action

Proudly hosted on https://www.clever-cloud.com/

• all sensors: http://creatures.cleverapps.io/sensors
• all temperature sensors: http://creatures.cleverapps.io/sensors/temperature
• all humidity sensors: http://creatures.cleverapps.io/sensors/humidity
• one temperature sensor: http://creatures.cleverapps.io/sensors/temperature/t42
• one humidity sensor: http://creatures.cleverapps.io/sensors/humidity/h42

Create a new sensor

• a sensor (always extend Thing) is a set of one or more components:
  • sensors implementations are in /things
  • components implementations are in /components
  • sensor sample: https://github.com/bots-squad/creatures/blob/master/things/TemperatureSensor.js

Here TemperatureSensor has only one component: TemperatureComponent

class TemperatureSensor extends Thing {
  constructor({id, minTemperature, maxTemperature, delay}) {
    super({id, delay});
    this.temperature = new TemperatureComponent({minTemperature, maxTemperature})
  }

But you can imagine a DHT sensor like that:

class TemperatureSensor extends Thing {
  constructor({id, minTemperature, maxTemperature, minHumidity, maxHumidity, delay}) {
    super({id, delay});
    this.temperature = new TemperatureComponent({minTemperature, maxTemperature})
    this.humidity = new HumidityComponent({minHumidity, maxHumidity})
  }

• a thing must have:
  • a constructor
  • a generateData() method
    • This method is called at a frequency defined by delay
    • you start the data generation/simulation like that: thing.start("generateData") (so, you can name generateData otherwise)
  • a getData() method
    • you call this method when you want sone values/informations about the sensor (eg inside an api)
    • getData() does not trigger generateData()
      • generateData() is called by a kind of worker
      • see start() method of https://github.com/bots-squad/creatures/blob/master/mum/Thing.js

Instantiate “a lot of” sensors

See main.js

Eg: “I want 100 humidity sensors”

// Generate n humidity sensors
let humiditySensors = [...Array(100).keys()].map(item => {
  let h = new HumiditySensor({id:`h${item}`, delay:randomDelay()});
  h.start("generateData");
  return  h;
});

Create an “API” to get the sensors data

See main.js

Eg: “I want to get all temperature sensors”

app.get('/sensors/temperature', authorized, (req, res) => {
  res.send(temperatureSensors.map(sensor => sensor.getData()));
});

Add a new sensor

• You have to make a Pull Request
• When I will merge it on master, your new sensor will be automatically deployed on http://creatures.cleverapps.io

ToDo

• security (key in the header)
• “swaggify” the API
• add other REST Methods to the Things (eg: POST)
• add other protocols (eg: CoAP, MQTT, …)
• add “boids” (moving sensors)
• refactoring
• …