LM35DZ sensor gives 0 value

Other Hardware Sensors
1

Hello. I am new to using the LM35DZ sensor and I just unpacked it. I believe I connected the cables correctly. But for some reason the sensor starts to give a value in a certain range and then slowly drops to 0. I have the same problem with 2 LM35DZ sensors that I just unpacked.

Code:

#define LM35_Pin A0


void setup() {
  Serial.begin(9600);
  pinMode(LM35_Pin, INPUT);
}
void loop() {
  Serial.print("Value: ");
  Serial.println(analogRead(LM35_Pin));
  delay(1000);
}

Output (9600)

Value: 11
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 1
Value: 3
Value: 5
Value: 5
Value: 5
Value: 8
Value: 10
Value: 11
Value: 11
Value: 10
Value: 12
Value: 12
Value: 10
Value: 8
Value: 6
Value: 4
Value: 3
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 16
Value: 47
Value: 73
Value: 77
Value: 75
Value: 75
Value: 73
Value: 70
Value: 68
Value: 64
Value: 64
Value: 60
Value: 48
Value: 26
Value: 5
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
Value: 0
...

20240815_153944
20240815_1539441920×1440 235 KB

Set-up

What am i doing wrong?

2

Two things: not errors, but opportunities for improvement.

  1. You don't need to configure an analog input pin as INPUT.
  2. Always start at a much higher serial rate and reduce if needed. I suggest 115,200bps

Your code looks fine so it's probably a wiring error. Show a schematic. A photo of what you have done isn't very useful.

3

To debug, remove shield and plug cables direct to arduino.

4

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