Example code for the "Chirp" soil moisture sensor

Hi guys.
This following post refers to the "Chirp" soil moisture sensor (https://www.tindie.com/products/miceuz/i2c-soil-moisture-sensor/).

I just successfully integrate this sensor into Espruino. As far as I know, nobody did it yet (or did not publish a basic example code), so I decided to post it here.

You will notice that this piece of hardware integrate a capacitive sensor, as well as a luminosity & temperature sensor.
The temperature result is in [°c/10] : if result is 226, temperature is 22.6°c.
The capacitive & luminosity sensor are both relative.

If you try it, do not forget to add two ~10k Pull-ups on both SDA and SCL.

// Soil Moisture Sensor Example | JRY | 26.06.2015
var Temp;
var Lumi;
var Capa;
I2C1.setup({scl:B6,sda:B7});

function getLuminosity(){//takes ~2 sec. to acquire
  I2C1.writeTo(0x20,0x03);
  setTimeout(function(){
    I2C1.writeTo(0x20,0x04);
    Lumi=I2C1.readFrom(0x20,2);
    print("Lumi:"+(Lumi[0]*256+Lumi[1]));
  },2000);
}

function getCapacitance(){
  var Res;
  I2C1.writeTo(0x20,0x00);
  Res=I2C1.readFrom(0x20,2);
  Capa=Res[0]*256+Res[1];
  print("Capa: "+Capa);
}

function getTemperature(){
  var Res;
  I2C1.writeTo(0x20,0x05);
  Res=I2C1.readFrom(0x20,2);
  Temp=Res[0]*256+Res[1];
  print("Temp: "+Temp);
}
I2C1.writeTo(0x20,0x06);//reset the sensor
//setInterval(getTemperature,10000);
//setInterval(getLuminosity,4600);
setInterval(getCapacitance,1000);

If anyone has a better code or a dedicated .js class, do not hesitate to publish it! :-)

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