Variable Not declared in scope error

I’m pretty sure I know what scope is. I could use the Variable to print in serial but I can’t use it to give sdata1 a value. Here’s my code:

#include <OneWire.h>
#include <DallasTemperature.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>

SoftwareSerial nodemcu(2,3);

#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
#define ONE_WIRE_BUS 5

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);

int pHArray[ArrayLenth];   //Store the average value of the sensor feedback
int pHArrayIndex=0;
float Celsius = 0;

float sdata1 = 0;
float sdata2 = 0;

String cdata;
    
void setup(void)
{  
  Serial.begin(9600);
  nodemcu.begin(9600); 
  Serial.println("Water pH and Temp!");//Test the serial monitor
  lcd.begin(16,2);
  lcd.clear();
}
void loop(void)
{
  static unsigned long samplingTime = millis();
  static unsigned long printTime = millis();
  static float pHValue,voltage;

  sensors.requestTemperatures();
  Celsius = sensors.getTempCByIndex(0);
  
  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("Temp:");
  Serial.print(Celsius);
  lcd.setCursor ( 0, 0 );
  lcd.print("Temp:");
  lcd.print(Celsius);
  Serial.print("    pH value: ");
  Serial.println(pHValue,2);
  lcd.setCursor ( 0, 1 );
  lcd.print("pH value:");
  lcd.println(pHValue,2);
    sdata1 = Celcius;
    sdata2 = pHValue;
   cdata = cdata + sdata1+","+sdata2;
   Serial.println(cdata);
   nodemcu.println(cdata);
   delay(2000);
   cdata = "";
        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;
}

In the loop function, the error occurs when I want to give sdata1 the value of Celcius but I could print Celcius in Serial and lcd. Error message was “‘Celcius’ was not declared in this scope”.Any idea how to fix this? Kinda in a pinch :confused:

Check your spelling. Celcius vs Celsius

Wow, toppled by the simplest of things! In my defense I was very tired hahah. Thanks a lot!