Upload New File

code ARDUINO/exemple_ph_meter.ino

+
+/*
+ # This sample code is used to test the pH meter V1.0.
+ # Editor : YouYou
+ # Ver    : 1.0
+ # Product: analog pH meter
+ # SKU    : SEN0161
+*/
+#define SensorPin A0            //pH meter Analog output to Arduino Analog Input 0
+#define Offset 0.00            //deviation compensate
+#define LED 13
+#define samplingInterval 20
+#define printInterval 800
+#define ArrayLenth  40    //times of collection
+int pHArray[ArrayLenth];   //Store the average value of the sensor feedback
+int pHArrayIndex=0;
+void setup(void)
+{
+  pinMode(LED,OUTPUT);
+  Serial.begin(9600);
+  Serial.println("pH meter experiment!");    //Test the serial monitor
+}
+void loop(void)
+{
+  static unsigned long samplingTime = millis();
+  static unsigned long printTime = millis();
+  static float pHValue,voltage;
+  if(millis()-samplingTime > samplingInterval)
+  {
+      pHArray[pHArrayIndex++]=analogRead(SensorPin);
+      if(pHArrayIndex==ArrayLenth)pHArrayIndex=0;
+      voltage = avergearray(pHArray, ArrayLenth)*5.0/1024;
+      pHValue = 3.5*voltage+Offset;
+      samplingTime=millis();
+  }
+  if(millis() - printTime > printInterval)   //Every 800 milliseconds, print a numerical, convert the state of the LED indicator
+  {
+    Serial.print("Voltage:");
+        Serial.print(voltage,2);
+        Serial.print("    pH value: ");
+    Serial.println(pHValue,2);
+        digitalWrite(LED,digitalRead(LED)^1);
+        printTime=millis();
+  }
+}
+double avergearray(int* arr, int number){
+  int i;
+  int max,min;
+  double avg;
+  long amount=0;
+  if(number<=0){
+    Serial.println("Error number for the array to avraging!/n");
+    return 0;
+  }
+  if(number<5){   //less than 5, calculated directly statistics
+    for(i=0;i<number;i++){
+      amount+=arr[i];
+    }
+    avg = amount/number;
+    return avg;
+  }else{
+    if(arr[0]<arr[1]){
+      min = arr[0];max=arr[1];
+    }
+    else{
+      min=arr[1];max=arr[0];
+    }
+    for(i=2;i<number;i++){
+      if(arr[i]<min){
+        amount+=min;        //arr<min
+        min=arr[i];
+      }else {
+        if(arr[i]>max){
+          amount+=max;    //arr>max
+          max=arr[i];
+        }else{
+          amount+=arr[i]; //min<=arr<=max
+        }
+      }//if
+    }//for
+    avg = (double)amount/(number-2);
+  }//if
+  return avg;
+}

[Ahicia BOA]

CODE ECRAN

#include <Wire.h> #include <I2C_LCD.h> I2C_LCD LCD; uint8_t I2C_LCD_ADDRESS = 0x51; //Device address configuration, the default value is 0x51.

//For detials of the function useage, please refer to "I2C_LCD User Manual". //You can download the "I2C_LCD User Manual" from I2C_LCD WIKI page: http://www.seeedstudio.com/wiki/I2C_LCD

void setup(void) { Wire.begin(); //I2C controller initialization. }

void loop(void) { LCD.CleanAll(WHITE); //Clean the screen with black or white. delay(1000); //Delay for 1s.

//8*16 font size��auto new line��black character on white back ground.
LCD.FontModeConf(Font_6x8, FM_ANL_AAA, BLACK_BAC); 

LCD.CharGotoXY(0,0);       //Set the start coordinate.
LCD.print("Hello World!");  //Display "Hello World!" on coordinate of (0, 10).

while(1);//Wait for ever. 

}