Three inputs to control single output(led)

Projects General Guidance
8

Hello
Try this sketch. You may make some edits to this sketch wrt to your reqiuerements.

// BLOCK COMMENT
// https://forum.arduino.cc/t/three-inputs-to-control-single-output-led/901093
#define ProjectName "Three Inputs to control single output(led)"
// CONSTANT DEFINITION
// you may need to change these constants to your hardware
constexpr byte Temp_[] {A3, A4, A5}; // connection to LowPot, HighPot, InSensor
constexpr byte Output_[] {2};        // connection to indicator
constexpr unsigned long measurementInterval {1000};
// VARIABLE DECLARATION
enum {One};
enum {LowPot, HighPot, InSensor};
struct TEMP {
  byte pin;
  int   min_;
  int   max_;
} temp [] {
  {Temp_[LowPot], 0, 511},
  {Temp_[HighPot], 512, 1023},
  {Temp_[InSensor], 0, 1013},
};
struct TIMER {
  unsigned long duration;
  unsigned long stamp;
  bool control_;
};
TIMER readTemp {measurementInterval, 0, true};
struct LED {
  byte pin;
};
LED led {Output_[One]};

// FUNCTIONS

void setup() {
  Serial.begin(9600);
  Serial.println(F("."));
  Serial.println(F("File   : ")), Serial.println(__FILE__);
  Serial.println(F("Date   : ")), Serial.println(__DATE__);
  Serial.println(F("Project: ")), Serial.println(ProjectName);
  pinMode (LED_BUILTIN, OUTPUT);
  for (auto Output : Output_) pinMode(Output, OUTPUT);
  // check outputs
  for (auto Output : Output_) digitalWrite(Output, HIGH);
  delay(1000);
  for (auto Output : Output_) digitalWrite(Output, LOW);
}
void loop () {
  unsigned long currentTime = millis();
  digitalWrite(LED_BUILTIN, (currentTime / 500) % 2);

  if (currentTime - readTemp.stamp >= readTemp.duration && readTemp.control_) {
    readTemp.stamp = currentTime;
    int tempMin =      map(analogRead(temp[LowPot].pin),  temp[InSensor].min_, temp[InSensor].max_, temp[LowPot].min_,   temp[LowPot].max_);
    int tempMax =      map(analogRead(temp[HighPot].pin), temp[InSensor].min_, temp[InSensor].max_, temp[HighPot].min_,  temp[HighPot].max_);
    int tempInSensor = map(analogRead(temp[InSensor].pin), temp[InSensor].min_, temp[InSensor].max_, temp[InSensor].min_, temp[InSensor].max_);
    Serial.print("\nread temp tempInSensor: "); Serial.println(tempInSensor);
    if (tempInSensor < tempMin) {
      digitalWrite(led.pin, HIGH);
      Serial.print("read tempMin: "); Serial.println(tempInSensor);
    }
    if (tempInSensor > tempMax) {
      digitalWrite(led.pin, LOW);
      Serial.print("read tempmax: "); Serial.println(tempMax);
    }
  }
}

Have a nice day and enjoy coding.