/*

This code reads the 0-1 V output of the ChipCap-L T/RH sensor.

The circuit:

http://www.ge-mcs.com/download/moisture-humidity/920_426b.pdf

A0  - OUT-RH (pin 14)
A1  - NC     (pin 1)
GND - GND    (pin 4)
5V  - V+     (pin 11)
 
connect a 0.1u capacitor between ground and V+ 
 
 */


const int analogPin0 = A0;      // Analog input pin attached to the RH output pin on the ChipCap-L sensor
const int analogPin1 = A1;      // Analog input pin attached to the T output pin on the ChipCap-L sensor
const float volt = 0.001074219; // multiplier to go from 0-1023 to volts

float RH = 0;                   // RH variable
float T1 = 0;                   // T variable

void setup() {

  Serial.begin(9600);            // initialize serial communications at 9600 bps:
  analogReference(INTERNAL);     // switch to the internal 1.1V analog reference (use just 'INTERNAL' with the Uno)
}

void loop() {

  RH = analogRead(analogPin0);   // read the analog RH value
  T1 = analogRead(analogPin1);   // read the analog T value

  RH = RH * volt * 100;          // convert to RH as shown on the datasheet
  T1 = (T1 * volt *200)-50;      // convert to T as shown on the data sheet
  
// print the results to the serial monitor

  Serial.print("RH = " );                       
  Serial.print(RH,2);      
  Serial.print(" T = ");      
  Serial.println(T1,2);   
  
  delay(2000);                   // wait 2 seconds so it's easier to watch the serial output                   
}