ENVICO^®light

Humidity Adapter

Top side, MC9808, ±0.25°C	Bottom side, CC2D35, ±2%RH, (±0.3°C)

✈ Circuit Description

✈ Downloads

✈ Arduino Sketch - The TEST - Code

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/* 
 *  EGG-DUINO V1.0
 *  12.04.2016 ALEXANDER C. FRANK 
 * 
 */

#include <Wire.h>
#include <SPI.h>
 
#include <LiquidCrystal.h>
LiquidCrystal lcd(9, 8, 7, 6, 5, 4);
 
// Pin declarations
int LED = 13 ;
int SA = 3 ;
int SB = 2 ;
 
// Constants declarations;
byte Eeeprom = 0x50 ;
byte LuxSensor = 0x44 ;
byte Barometer = 0x60 ;
byte HumidityAddress = 0x28 ;
byte TemperatureAddress = 0x18 ;
 
// Global Variables declaration
float humidity = 0 ;
float temperature = -99 ;

void setup() 
{
Wire.begin();
Serial.begin(9600);
 
pinMode(LED, OUTPUT);
pinMode(SA, OUTPUT);
pinMode(SB, OUTPUT);
pinMode(A2, OUTPUT);
 
lcd.begin(16, 2);
lcd.clear();
lcd.setCursor(0,0);lcd.print("GRUEZI :-)");
lcd.setCursor(0,1);lcd.print("EGG-DUINO V1.0"); 

delay(6789);
}
 

 
void loop() 
{

lcd.clear();

// Select DSUB K6, SD_0 and SC_0 (MC14052)
digitalWrite(SA, LOW);
digitalWrite(SB, LOW);
digitalWrite(A2, LOW);

// TEMPERATURE, MCP8908
Wire.beginTransmission(TemperatureAddress);
Wire.write(0x05); 
Wire.endTransmission(); 
Wire.requestFrom(TemperatureAddress,2);
byte temp_hi = Wire.read();
byte negative = temp_hi & 0x10;
temp_hi = temp_hi & 0x0F ;
byte temp_lo = Wire.read();
int temp = (( temp_hi << 8 ) | temp_lo ) ;
temperature = temp / 16.0 ;
if (negative >= 1) temperature -= 256 ;
lcd.setCursor(0,0);lcd.print("TEMP: ");
if (temperature > -45.0 ) { lcd.print(temperature,1); lcd.print(" "); 
lcd.print((char)223); lcd.print("C "); }
else { lcd.print("NESCIO "); }
 
// HUMIDITY, CC2D35
Wire.beginTransmission(HumidityAddress);
Wire.write(0x00); 
Wire.endTransmission(); 
Wire.requestFrom(HumidityAddress,2);
int hum_hi = Wire.read();
int hum_lo = Wire.read();
int humi = (( hum_hi << 8 ) | hum_lo ) & 0x3FFF ;
int ok = ( humi & 0xC000 ) >> 14 ;
humidity = humi * 100.0 / 16384 ;
lcd.setCursor(0,1);lcd.print("HUMI: ");
if (humidity > 0 ) { lcd.print(humidity,1); lcd.print(" %RH "); }
else { lcd.print("NESCIO "); }

delay(3456);
} 

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