pH sensor V2 returns nan for pHValue
Zappie 2022-10-19 13:04:09 1475 Views2 Replies After connecting the pH sensor V2, the pHvalue is given as nan.
The voltage however is measured and responds to different solutions.
I downloaded the library directly from the library manager in arduino.
I have tried clearing the EEPROM using this code, but to no avail.
#include <EEPROM.h>
#define KVALUEADDR 0x0A
void setup(){
for(byte i = 0;i< 8; i++ ){
EEPROM.write(KVALUEADDR+i, 0xFF);
}
}
void loop(){
}
Sorry here is the code; i let arduino ignore the lines that are used when a temperature sensor is added.
//PH Sensor (SKU:SEN0161-V2)
#include "DFRobot_PH.h"
#include <EEPROM.h>
#define PH_PIN A1
float voltage,phValue,temperature = 25;
DFRobot_PH ph;
//Temperature sensor (LM35)
//const int lm35_pin = 20; //* LM35 pin
//int LM_Temperature_sensor_read;
void setup()
{
Serial.begin(115200);
//Ph Sensor.
ph.begin();
// LM35 Sensor.
//pinMode(lm35_pin, INPUT);
}
void loop()
{
static unsigned long timepoint = millis();
if(millis()-timepoint>1000U) //time interval: 1s
{
timepoint = millis();
voltage = analogRead(PH_PIN)/1024.0*5000; // read the voltage
//LM_Temperature_sensor_read = analogRead(lm35_pin);
// temperature = (LM_Temperature_sensor_read*0.488); // read your temperature sensor to execute temperature compensation
phValue = ph.readPH(voltage,temperature); // convert voltage to pH with temperature compensation
Serial.print("temperature:");
Serial.print(temperature,1);
Serial.print(" C ");
Serial.print("voltage: ");
Serial.print(voltage,2);
Serial.print(" pH:");
Serial.println(phValue,3);
}
ph.calibration(voltage,temperature); // calibration process by Serail CMD
}
Zappie 