Create Rain_gauge_sensor_vXB.pde

Rain_gauge_sensor_vXB.pde

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+/*
+Arduino sketch to record the switching of the reed switch in the rain gauge
+The sketch work by counting the number of times the reed switch has changed position
+The sketch has been extended to include code to log the analogue reading from the rain detector
+Version XB - code has been reduce to remove the rain sensor functionality
+*/
+
+
+#include <SD.h>          //Ensure that you downlaod these libraries and store them in your Arduino libraries folder 
+#include <Wire.h>        //Remember no semi-colon after these commands
+#include "RTClib.h"
+
+
+const int REED = 9;     //The reed switch outputs to digital pin 9
+
+int val = 0;            //Current value of reed switch
+int old_val = 0;        //Old value of reed switch
+
+int REEDCOUNT = 0;      //The intial count is zero
+
+const int chipSelect = 10;
+File logfile;
+#define SYNC_INTERVAL 60000
+uint32_t syncTime = 0; // time of last sync()
+
+const int redLEDpin = 3;
+const int greenLEDpin = 2;
+
+RTC_DS1307 RTC; // define the Real Time Clock object
+
+/////////////Program Set-up/////////////////////////////////////////////////////////////////////
+
+void setup(void){
+
+  Serial.begin(9600);
+  pinMode (REED, INPUT_PULLUP);  //Activate the internal pull-up resistor
+  pinMode(greenLEDpin, OUTPUT);
+  pinMode(redLEDpin, OUTPUT);
+
+
+/////////////Setting up the file on the SD Card///////////////////////////////
+
+  Serial.println("Initializing SD card...");
+  pinMode(10, OUTPUT);  // make sure that the default chip select pin is set to output
+
+  // see if the card is present and can be initialized:
+  if (!SD.begin(chipSelect)) {
+    Serial.println("Card failed, or not present");
+  }
+  Serial.println("card initialized.");
+
+  // create a new file
+  char filename[] = "LOGGER00.CSV";      //The file names must be in the 8.3 format
+  for (uint8_t i = 0; i < 100; i++) {
+    filename[6] = i/10 + '0';
+    filename[7] = i%10 + '0';
+    if (! SD.exists(filename)) {
+      // only open a new file if it doesn't exist
+      logfile = SD.open(filename, FILE_WRITE); 
+      break;  // leave the loop!
+    }
+  }
+
+  if (! logfile) {
+    Serial.println("could not create file");
+  }
+
+  Serial.print("Logging to: ");
+  Serial.println(filename);
+
+//Connect to RTC
+Wire.begin();
+  if (!RTC.begin()) {
+    logfile.println("RTC failed");
+  }
+Serial.println("channel, Reading/count, date, time");
+logfile.println("channel, Reading/count, date, time");  
+}
+///////////////////The Program Loop//////////////////////////////////////////////////////////////////////
+void loop(){
+
+ DateTime now;    // and record date/time of change
+
+  val = digitalRead(REED);
+
+ //Low means that the Reed switch is open (which happens when the magnet passess).
+
+  if ((val == LOW) && (old_val == HIGH)){
+
+ delay(10);    // Delay put in to deal with any "bouncing" in the switch.
+
+ REEDCOUNT = REEDCOUNT + 1;
+
+now = RTC.now();
+
+ old_val = val;
+
+ digitalWrite(redLEDpin, HIGH);
+
+ char buf1[50];
+
+ Serial.print("Reedcount");
+ Serial.print(", ");
+ Serial.print(REEDCOUNT);
+ Serial.print(", ");
+
+ sprintf(buf1, "%02d/%02d/%02d, %02d:%02d:%02d", now.day(), now.month(), now.year(), now.hour(), now.minute(), now.second());
+ Serial.println(buf1);
+
+ logfile.print("Reedcount");
+ logfile.print(", ");
+ logfile.print(REEDCOUNT);
+ logfile.print(", ");
+ logfile.println(buf1);
+
+ digitalWrite(redLEDpin, LOW);
+
+}
+  else {
+    old_val = val;
+  }
+
+  if ((millis() - syncTime) < SYNC_INTERVAL) return;
+  digitalWrite(greenLEDpin, HIGH);
+  delay(10);
+  logfile.flush();
+  digitalWrite(greenLEDpin, LOW);
+  syncTime = millis();
+
+ }
+