Initial commit

Circuit.ino

+
+//Ultrasonic sendor 
+const int pingPin = 7; // Trigger Pin of Ultrasonic Sensor
+const int echoPin = 6; // Echo Pin of Ultrasonic Sensor
+
+//TDS
+#include <EEPROM.h>
+#include "GravityTDS.h"
+
+#define TdsSensorPin A0
+#define VREF 5.0 
+#define SCOUNT  30
+
+int analogBuffer[SCOUNT];     // store the analog value in the array, read from ADC
+int analogBufferTemp[SCOUNT];
+int analogBufferIndex = 0;
+int copyIndex = 0;
+
+float averageVoltage = 0;
+float tdsValue = 0;
+
+float temperature = 25; 
+
+
+
+//Turbidity
+#define sensor_pin A1
+int volt;
+float voltage = 0.00;
+float turbidity = 0.00;
+float Vclear = 2.85; // Output voltage to calibrate (with clear water).
+int sensorValue = 0;
+
+
+
+
+// median filtering algorithm for TDS calculation
+int getMedianNum(int bArray[], int iFilterLen){
+  int bTab[iFilterLen];
+  for (byte i = 0; i<iFilterLen; i++)
+  bTab[i] = bArray[i];
+  int i, j, bTemp;
+  for (j = 0; j < iFilterLen - 1; j++) {
+    for (i = 0; i < iFilterLen - j - 1; i++) {
+      if (bTab[i] > bTab[i + 1]) {
+        bTemp = bTab[i];
+        bTab[i] = bTab[i + 1];
+        bTab[i + 1] = bTemp;
+      }
+    }
+  }
+  if ((iFilterLen & 1) > 0){
+    bTemp = bTab[(iFilterLen - 1) / 2];
+  }
+  else {
+    bTemp = (bTab[iFilterLen / 2] + bTab[iFilterLen / 2 - 1]) / 2;
+  }
+  return bTemp;
+}
+
+
+
+
+
+
+
+
+
+long microsecondsToInches(long microseconds) {
+   return microseconds / 74 / 2;
+}
+
+long microsecondsToCentimeters(long microseconds) {
+   return microseconds / 29 / 2;
+}
+
+
+void setup()
+{
+    Serial.begin(115200);
+    pinMode(TdsSensorPin,INPUT);//TDS analog input  A0
+    pinMode(sensor_pin, INPUT);//Turbifity analog input A1
+}
+
+void loop()
+{
+  //Ultrasonic
+long duration, inches, cm;
+   pinMode(pingPin, OUTPUT);
+   digitalWrite(pingPin, LOW);
+   delayMicroseconds(2);
+   digitalWrite(pingPin, HIGH);
+   delayMicroseconds(10);
+   digitalWrite(pingPin, LOW);
+   pinMode(echoPin, INPUT);
+   duration = pulseIn(echoPin, HIGH);
+   inches = microsecondsToInches(duration);
+   cm = microsecondsToCentimeters(duration);
+
+   //TDS
+   static unsigned long analogSampleTimepoint = millis();
+if(millis()-analogSampleTimepoint > 40U){     //every 40 milliseconds,read the analog value from the ADC
+  analogSampleTimepoint = millis();
+  analogBuffer[analogBufferIndex] = analogRead(TdsSensorPin);    //read the analog value and store into the buffer
+  analogBufferIndex++;
+  if(analogBufferIndex == SCOUNT){ 
+    analogBufferIndex = 0;
+  }
+} 
+
+
+static unsigned long printTimepoint = millis();
+if(millis()-printTimepoint > 800U){
+  printTimepoint = millis();
+  for(copyIndex=0; copyIndex<SCOUNT; copyIndex++){
+    analogBufferTemp[copyIndex] = analogBuffer[copyIndex];
+      
+    // read the analog value more stable by the median filtering algorithm, and convert to voltage value
+    averageVoltage = getMedianNum(analogBufferTemp,SCOUNT) * (float)VREF / 1024.0;
+
+
+  }    
+
+}
+
+
+//temperature compensation formula: fFinalResult(25^C) = fFinalResult(current)/(1.0+0.02*(fTP-25.0)); 
+float compensationCoefficient = 1.0+0.02*(temperature-25.0);
+//temperature compensation
+float compensationVoltage=averageVoltage/compensationCoefficient;   
+//convert voltage value to tds value
+tdsValue=(133.42*compensationVoltage*compensationVoltage*compensationVoltage- 255.86*compensationVoltage*compensationVoltage + 857.39*compensationVoltage)*0.5;
+
+
+//Turbidty
+
+sensorValue = analogRead(sensor_pin);
+
+voltage = sensorValue * (5.000 / 1023.000); // Convert analog (0-1023) to voltage (0 - 5V)
+
+turbidity = 100.00 - (voltage / Vclear) * 100.00; // as relative percentage; 0% = clear water;
+  
+
+   //Ultrasinic
+   Serial.print("Distance To Water Level : {");
+   Serial.print(inches);
+   Serial.print("in, ");
+   Serial.print(cm);
+   Serial.print("cm }");
+
+//TDS output
+Serial.print("  TDS Value: {");
+Serial.print(tdsValue,0);
+Serial.print("ppm }");
+
+//Turbidity output
+
+Serial.print("  Turbidity: ");
+Serial.print(turbidity);
+Serial.print("  ");
+
+
+if(turbidity<-28)            Serial.print("Water Very Clean ");
+if(turbidity>=-28 && turbidity<-16) Serial.print("Water Norm Clean ");
+if(turbidity>=-16)           Serial.print("Water Very Dirty/Outside from water ");
+
+
+
+
+   Serial.println();
+
+   
+   delay(100);
+
+}