gistfile1.js

// Temperature and Humidity Monitor using Honeywell HIH6130 sensor 
//hardware.configure(I2C1_89);
local i2c = hardware.i2c89;
i2c.configure(CLOCK_SPEED_100_KHZ);
 
local out_temp  = OutputPort("Temperature");
local out_humid = OutputPort("Humidity");
imp.configure("Temp/Humid", [],[out_temp, out_humid]);
address <- 0x27;
 
local function getsample() {
    // Start conversion
    i2c.write(address, "");
 
    // Wait at least 36ms
    imp.sleep(0.05);
 
    // Read out temperature and humidity, zero length subaddress means the write
    // subaddr phase will be totally skipped and we'll just do the read
    local th = i2c.read(address, "", 4);
    server.log(th);
    // note data will be marked as stale because each read kicks off another
    // cycle as we always do a write-before-read on i2c
    // hence, we need to mask top bits of humidity byte
 
    // Form temp and humidity
    local temperature = ((((th[2]         << 6 ) | (th[3] >> 2)) * 165) / 16383.0) - 40;
    local humidity    = ((((th[0] & 0x3F) << 8 ) | (th[1]     ))        / 163.83 );
 
    // log and print
    server.log(format("temperature %.2fC humidity %.2f%%",temperature, humidity));
    server.show(format("%.2fC %.2f%%", temperature, humidity));
 
    //Send data to server
    out_temp.set(temperature);
    out_humid.set(humidity);
}
 
// Need to do this just once to configure ATSHA: nora only!
//hardware.configureimpee({ pin3v3 = 1 });
//hardware.configureimpee({ polarity3v3 = 1 });
 
// Get a sample, then sleep
getsample();
server.sleepfor((5*60)-3);