First checkin

First checkin

Author: robhafernik

ArduinoSensorFun

@@ -0,0 +1,141 @@
+/*
+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