JeeLabs Café

//>>> The latest version of this code can be found at https://github.com/jcw/ !!

// Example indoor temp + humidty + barometer, mounted on a Graphics Board

// 2010-11-17 <jcw@equi4.com> http://opensource.org/licenses/mit-license.php

// $Id: indoor.pde 7763 2011-12-11 01:28:16Z jcw $

#include "ST7565.h"

#include <Ports.h>

#include <PortsBMP085.h>

#include <PortsSHT11.h>

#include <RF12.h> // needed to avoid a linker error :(

ST7565 glcd(14, 4, 17, 7);

SHT11 th_sensor (3);        // port 3

PortI2C two (2);            // port 2

BMP085 p_sensor (two, 3);   // ultra high resolution

MilliTimer timer;

char outBuf [25];

// this has to be added since we're using the watchdog for low-power waiting

ISR(WDT_vect) { Sleepy::watchdogEvent(); }

// spend a little time in power down mode while the SHT11 does a measurement

static void shtDelay () {

    Sleepy::loseSomeTime(32); // must wait at least 20 ms

}

void setup () {

    rf12_initialize(1, RF12_868MHZ);

    rf12_sleep(RF12_SLEEP); // power down

    p_sensor.getCalibData();

    glcd.st7565_init();

    glcd.st7565_command(CMD_DISPLAY_ON);

    glcd.st7565_command(CMD_SET_ALLPTS_NORMAL);

    glcd.st7565_set_brightness(0x15);

}

void loop () {

    glcd.clear();

    float h, t, d;

    th_sensor.measure(SHT11::HUMI, shtDelay);        

    th_sensor.measure(SHT11::TEMP, shtDelay);

    th_sensor.calculate(h, t);

    d = th_sensor.dewpoint(h, t);

    // convert back to ints

    int temp = t * 10 + 0.5;

    int humi = h + 0.5;

    int dewp = d * 10 + 0.5;

    // sensor readout takes some time, so go into power down while waiting

    int temp2;

    long pres;

    p_sensor.startMeas(BMP085::TEMP);

    Sleepy::loseSomeTime(16);

    p_sensor.getResult(BMP085::TEMP);

    p_sensor.startMeas(BMP085::PRES);

    Sleepy::loseSomeTime(32);

    p_sensor.getResult(BMP085::PRES);

    p_sensor.calculate(temp2, pres);

    glcd.drawstring(0, 0, "SHT11:");

    sprintf(outBuf, "       Temp %4d.%d C", temp/10, temp%10);

    glcd.drawstring(0, 1, outBuf);

    sprintf(outBuf, "   Dewpoint %4d.%d C", dewp/10, dewp%10);

    glcd.drawstring(0, 2, outBuf);

    sprintf(outBuf, "   Humidity %4d   %%", humi);

    glcd.drawstring(0, 3, outBuf);

    glcd.drawstring(0, 5, "BMP085:");

    sprintf(outBuf, "       Temp %4d.%d C", temp2/10, temp2%10);

    glcd.drawstring(0, 6, outBuf);

    sprintf(outBuf, "   Pressure %4d.%d mb", (int) (pres/100),

                                             (int) (pres%100) / 10);

    glcd.drawstring(0, 7, outBuf);

    glcd.display();

    Sleepy::loseSomeTime(1000);

}