/*

This sketch reads three sensors from the Grove Collection:

A0: Temp and Humidity, SEN51035P

A1: Light Sensor, SEN11302P

A2: Rotary Sensor, COM22735P

*/

/*

Base code for RHT03 stolen from https://codebender.cc/sketch:70199

*/

#include <math.h>

double temp;

double humi;

unsigned int loopCnt;

int chr[40] = {0}; // an array is created to store 40 elements

unsigned long xtime;

void setup()

{

Serial.begin(9600); // Serial port not used

} //end setup

void loop()

{

// ----------------- temp and humidity sensor------------------

// Give the "START SIGNAL" to the sensor: LOW + HIGH pulse of specific duration.

delay(200);// Not less than 200 ms delay for 1 sensor! It can't read faster. (For 2 sensors, :2 !)

pinMode(A0,OUTPUT);

digitalWrite(A0,LOW);// send LOW pulse of 20 millis!

delay(20);

digitalWrite(A0,HIGH);// send HIGH pulse of 40 micros!

delayMicroseconds(40);

digitalWrite(A0,LOW);// Go back to LOW and wait for the sensor.

pinMode(A0,INPUT);// Make the signal pin an input and listen to the sensor:

loopCnt=10000;

while(digitalRead(A0) != HIGH)// NOT HIGH: While waiting for the sensor to answer...

{

if(loopCnt-- == 0)

{

Serial.println("NO Signal!");

}// end if

}// end while

loopCnt=30000;

while(digitalRead(A0) != LOW)

{

if(loopCnt-- == 0)

{

//Serial.println("OK sensor sends data!");

//Serial.println(" ");

}// end if

}

// Now receiving data from sensor:

for(int i=0;i<40;i++)// Go through 40 steps: Increment "i" with 1 each time and store the databits in the array "chr".

{

while(digitalRead(A0) == LOW) // LOW pulses are not interesting...

{

// do nothing!

}// end while

xtime = micros(); // start the timer!

while(digitalRead(A0) == HIGH) // Now look at the HIGH pulses: LONG = 1, SHORT = 0!

{

}// end while

if (micros() - xtime >50) // If a long HIGH pulse (>50 microseconds) is seen...

{

chr[i]=1; // store a "1" in the array "chr"

}// end if

else // If a short HIGH pulse (<50 microseconds) is seen...

{

chr[i]=0; // store a "0" in the array "chr"

}// end else

}// end for

// Now convert 3 bytes (The 1st, 3rd and 5th) in the array "chr" into (decimal) integers: The sensor output values...

humi=chr[6]*512+chr[7]*256+chr[8]*128+chr[9]*64+chr[10]*32+chr[11]*16+chr[12]*8+chr[13]*4+chr[14]*2+chr[15]; // Second byte received: This is the humidity (%) *10 (You can leave the first 5 bits out: The number will never become as big...)

temp=chr[22]*512+chr[23]*256+chr[24]*128+chr[25]*64+chr[26]*32+chr[27]*16+chr[28]*8+chr[29]*4+chr[30]*2+chr[31]; // Second byte received: This is the temperature (°C) *10 (You can leave the first 5 bits out: The number will never become as big...The highest bit is used as + or - sign)

humi=humi/10; // Divide by 10 to obtain the humidity (%)

if (chr[16]==1) // If highest temp bit = 1 => minus temperature!

{

temp=temp/-10; // Divide by -10 to change to minus

}// end if

else // If highest temp bit = 0 => plus temperature...

{

temp=temp/10; // Divide by 10 to obtain the temperature (°C)

}// end else

// convert to F

temp = (temp * 1.8) + 32.0;

int itemp = (int) (temp + 0.5);

int ihumi = (int) (humi + 0.5);

// ----------------- light sensor

int lightRaw = analogRead(1);

float light=(float)lightRaw/1023.0;

// ----------------- rotary sensor

int rotVal = analogRead(2);

// map it to the range of the analog out:

int rot = map(rotVal, 0, 1023, 0, 255);

rot = rot * 39;

if(rot<1000) { rot = 1000; }

Serial.print(itemp);

Serial.print("F, ");

Serial.print(ihumi);

Serial.print("%, ");

Serial.print(light);

Serial.print("L, ");

Serial.print(rot);

Serial.println("R");

delay(rot);

}// end loop