LMT01: To interface with Arduino mega 2560

Josh, Thank you for your response.

I tried the same code you provided above with some modifications before as follows. But there is no output at Arduino serial monitor. I am using WSON package. Vp pin to 3.3 voltage, Vn to digital pin 3 of arduino mega 2560 with a shunt resistor of 6.8k.

+3.3v----------Vp---- [LMT01]---- Vn------------------ Digital pin 3

                                                                       |

                                                                       |

                                                               R (6.8 K)

                                                                       |

                                                                       |

                                                                Ground

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// Declare a variable to hold the pulse count, set it to 0 initially
volatile int pulseCount = 0;
// Declare a variable to hold the temperature, set it to 0 initially
float temperature = 0;
// Declare a variable to hold the previous pulse count, set it to 0 initially
int hold = 0;

// Setup function that runs once when the board is powered on or reset
void setup()
{
  // Set pin 3 as an input
  pinMode(3, INPUT);
  // Start serial communication at a baud rate of 9600
  Serial.begin(9600);
  // Set the Analog Comparator Control and Status Register to B01011010
  ACSR = B01011010;
  // Attach an interrupt to pin 3 that triggers when the signal falls from high to low (FALLING)
  attachInterrupt(digitalPinToInterrupt(3), countPulses, FALLING);
}

// Main loop function that runs repeatedly
void loop()
{
  // If the pulse count is not 0 (i.e. a pulse has been received)
  if (pulseCount != 0)
  {
    // Wait until the pulse count has stabilized (i.e. is not changing anymore)
    while (pulseCount != hold)
    {
      hold = pulseCount;
      delay(1);
    }
    // Calculate the temperature in Celsius from the pulse count
    temperature = 0.0625 * pulseCount - 50;
    // Print the pulse count and temperature to the serial monitor
    Serial.print("Pulse Count: ");
    Serial.print(pulseCount);
    Serial.print(", Temperature: ");
    Serial.print(temperature);
    Serial.println(" C");
    // Reset the pulse count to 0 to start counting again
    pulseCount = 0;
  }
  // Wait for 2 milliseconds before checking the pulse count again
  delay(2);
}

// Interrupt service routine that is triggered when a pulse is received on pin 3
void countPulses()
{
  // Increment the pulse count by 1
  pulseCount += 1;

}

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Hello Josh,

I am currently using an Arduino UNO board and I am attempting to locate the AIN0 and AIN1 pins on it, but have been unable to do so. I have been referring to a video [https://www.youtube.com/watch?v=CWDX6PdF-ZY&t=238s ] and schematic as a guide, and I have also attempted to use some code, but it did not produce the desired results.

Hi Ren,

As previously stated, I obtained a reading only after connecting the Vn to the negative of the comparator AIN01 (digiatl pin 5) on the Arduino mega 2560. How do I connect Vn from 15 sensors together like this [as like the figure you provided] to a single Arduino Mega 2560? That's where I need assistance. Is it possible?

Thank you.