新版电导率仪
//开发板为DOIT ESP32 DEVKIT V1//
#include "DS18b20forESP.h"
#include "ADS1115custom.h"
#define DIRPIN 25
#define PULPIN 26
int x,i=0, n = 0,j=0,k,nn,N;
float voltage, ecValue,ecValue_sum,ecValue_aver,ecValue_t, temperature = 25.0;
float_kvalue = 0.779, rawEC, valueTemp, value;
float celsius, fahrenheit;
float Temp_Buffer = 0, vv = 0;
float val = 0, EV = 0, strain = 0, pH = 0;
void setup()
{ Serial.begin(9600);
DS18b20Init();
ADS1115init();
pinMode(PULPIN, OUTPUT); // steps:脉冲个数
pinMode(DIRPIN, OUTPUT); // dir:为方向控制
}
void loop()
{ if(Serial.read()=='1'){//串口接收到1时运行以下函数
n = 0;//记录循环次数,
for (i = 0; i < 1000000000000000; i++)//当不发送0时一直循环
{n++;
if(Serial.read()=='0'){break;}//串口接收到0时跳出循环
////////采集温度率数据/////////////////
celsius=DS18b20GetTemp();
////////采集电导率数据/////////////////
ecValue_sum=0;
nn=100;
for (k = 0; k < nn; k++){ECdata();ecValue_t=ecValue;delay(10);}//间隔10ms采集一个数据
sort();//数据排序
N=0;
for (k = 20; k < 80; k++){ecValue_sum=ecValue_sum+ecValue_t;N++;}//去掉前后20个数据
ecValue_aver=ecValue_sum/N;//取剩下数据平均值
////////控制步进电机添加溶液/////////////////
motor();//添加溶液
////////////////输出四个参数///////////////
Serial.print(celsius); Serial.print(' '); //串口输出温度
Serial.print(celsius); Serial.print(' ');
Serial.print(ecValue_aver,4); Serial.print(' '); //口输出电导率
Serial.println(n*0.01389*1.1429); //串口输出体积
}}
}
//////////////////数据排序////////////////////////
void sort()
{int ii,jj;
float temp1;
for(ii=0;ii<nn-1;ii++)
{for(jj=0;jj<nn-1-ii;jj++)
{if(ecValue_t>ecValue_t)
{ temp1=ecValue_t;
ecValue_t=ecValue_t;
ecValue_t=temp1;
}
}
}
}
//控制42步进电机/////
void motor() {
digitalWrite(DIRPIN, HIGH); // Set Dir high
for (x = 0; x < 200; x++) // 300个脉冲数
{ digitalWrite(PULPIN, HIGH); // Output high
delayMicroseconds(700); // Wait 1/2 a ms
digitalWrite(PULPIN, LOW); // Output low
delayMicroseconds(700); // Wait 1/2 a ms
}
}
void ECdata()
{
ADS1115GetAdcValue();
voltage=adc_value*0.125;//电压毫伏
rawEC = 1000 * voltage / 820.0 / 196.0;//原始电导率,电压与电导率的线性比列关系,有先前实验得到
value = rawEC * _kvalue;//校正机械误差后的电导率,_kvalueLow和_kvalueHigh由实际的电导率比上测试得到的电导率
temperature = celsius; //dht.getTemperature();//校正后的电导率
ecValue = value / (1.0 + 0.0185 * (temperature - 25.0));//修正后的电导率,修正完以后都是25摄氏度下的数据,因此用除
}
#include <Wire.h>
#include <Adafruit_ADS1X15.h>
Adafruit_ADS1115 ads;/* Use this for the 16-bit version */
int adc_value;
void ADS1115init(void)
{
ads.setGain(GAIN_ONE); // 1x gain +/- 4.096V1 bit = 2mV 0.125mV
ads.begin();
}
void ADS1115GetAdcValue(void)
{
adc_value = ads.readADC_SingleEnded(1);
}
void ADS1115GetAdcValueWithFiller()//带平均值滤波的获取
{
unsigned long sum1 = 0;
unsigned char i = 0;
for (i = 0; i < 10; i++);
{
sum1 += ads.readADC_SingleEnded(1);
delayMicroseconds(10);
}
adc_value = sum1/10;
}
#include <OneWire.h>
#include <DallasTemperature.h>
// 定义DS18B20数据口连接ESP32的4号IO上
#define ONE_WIRE_BUS 4
// 初始连接在单总线上的单总线设备
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
void DS18b20Init()
{
sensors.begin();
}
float DS18b20GetTemp()
{
float temp;
sensors.requestTemperatures(); // 发送命令获取温度
temp = sensors.getTempCByIndex(0);
return temp;
}
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