#include <Wire.h>
#include <SPI.h>
#include <NewPing.h>
#include "SH1106.h"
#include "SH1106Ui.h"
#include "Ultrasonic.h"
#define OLED_RESET D1 // RESET
#define OLED_DC D2 // Data/Command
#define OLED_CS D8 // Chip select
// Pin definitions for SPI
// ESP8266
//#define OLED_RESET 5 // RESET
//#define OLED_DC 4 // Data/Command
//#define OLED_CS 15 // Chip select
// Node MCU
SH1106 display(true, OLED_RESET, OLED_DC, OLED_CS); // FOR SPI
SH1106Ui ui ( &display );
#define TRIGGER_PIN D3 // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN D4 // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
#define SensorPin A0 //pH meter Analog output to Arduino Analog Input 2
#define Offset 0.00 //deviation compensate
#define LED D1
#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;
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
void setup() {
Serial.begin(74880); // Open serial monitor at 115200 baud to see ping results.
pinMode(LED,OUTPUT);
Serial.begin(74880);
Serial.println("pH meter experiment!"); //Test the serial monitor
}
void ultrasonic() {
delay(1000); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
Serial.print("Ping: ");
Serial.print(sonar.ping_cm()); // Send ping, get distance in cm and print result (0 = outside set distance range)
Serial.println("cm");
}
void ph()
{
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,A0);
Serial.print(" pH value: ");
Serial.println(pHValue,A0);
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;
}
void loop() {
int remainingTimeBudget = ui.update();
ph();
ultrasonic();
if (remainingTimeBudget > 0) {
delay(remainingTimeBudget);
}
void loop () {
ph();
ultrasonic();
}
somente no monitor serial
mas não no display, alguém pode ajudar?
