ESP8266 Community Forum

- Wed Oct 21, 2015 2:31 pm #31947

Code: Select allvar altitude = 188; // current altitude in m
var mode =  2; //resolution of sensor conversion (0-3)
var afdt =  1; //present numbers after dot
var press = 0; //pressure
var temp  = 0; //temperature
var peri =  2; //period of reading sensor in sec.
var cl   =  0; // SCL to GPIO0
var da   =  2; // SDA to GPIO2
    function aftDot(number,ad)//Formatting numbers.
    {
    return (number.toString()).substr(0,(number.toString()).indexOf('.')+1+ad);
    }

    function readBMP()//read BMP85 or BMP180 sensor
    {
    I2C1.setup({scl:cl,sda:da});
    var bmp = require("BMP085").connect(I2C1,mode);
    bmp.getPressure(function(d)
                      {
      press = aftDot(bmp.getSeaLevel(d.pressure, altitude)/100,afdt);
      temp  = aftDot(d.temperature,afdt);
      console.log("Sea level pressure: " + press+ " hPa");
      console.log("Temperature: " + temp + " C");
                       }
                    );
    return;
    }

    function repeat()
    {readBMP(),setTimeout(repeat, peri*1000);}
    repeat();