UV Sensor reading 0

Other Hardware Sensors
1

Hi everyone, I'm encountering a problem with my UV sensor, when I read the value I just get 0. It's a basic sensor with VCC, which I've connected to 5V, GND which I've connected to GND, and OUT, which I've connected to A0. I was using another sensor model with the same pins and it gave me the same 0 result.
Right now I'm using this library, all of the example code is giving me 0 as a result, as well as my own code:

#include <AnalogUVSensor.h>

AnalogUVSensor AUV;

void setup() {
  Serial.begin(9600);
  AUV.begin(A0);
}

void loop() {
  float uvi = AUV.read(5);
  Serial.print("UVI: ");
  Serial.println(uvi);
  delay(1000);
}

Does anybody know why? It's an Arduino Uno R3. It's for a student project.
Thanks very much in advance.
I included a picture of the very basic wiring.

uv
uv1920×2560 332 KB

2

UV datasheet?

3

So simple, hard to go wrong. Could you just try another analog input?
Or, just do an analog read without the library in your way, to see if there's anything to read?

4

read() returns the UV index

if you are indoor, you probably have very few UV and the reading indeed could be 0

from the GitHub

Voltage UV index risk of harm Colour
<0.050 0 low Green
0.227 1 low Green
0.318 2 low Green
0.408 3 moderate Yellow
0.503 4 moderate Yellow
0.606 5 moderate Yellow
0.696 6 high Orange
0.795 7 high Orange
0.881 8 very high Red
0.976 9 very high Red
1.079 10 very high Red
1.170> 11 extreme Purple
1 Like
5

It's the same with the other analog inputs. Without the library it's also 0 :confused:

6

Are you indoors? Your sensor, at least, should be outside, in the open. See post #4.

7

Use your multimeter to check continuity of all the connections.

Did you carefully solder header pins to the UV sensor board?

8

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