I am using A02YYUW.it gives strange values.

"I am using A02YYUW. I am using the sample code provided by your company. Sometimes, when I go near a NUC PC or another PC or electronic product, it gives strange values. For example, even when there is nothing in the air, the condition (distance < 30) activates and it prints "Below the lower limit". Can you tell me why?"

Here's the English translation:

"I'm using A02YYUW. I'm utilizing the sample code provided by your company. At times, when I'm near a NUC PC or another PC or electronic device, it outputs odd values. For instance, even if there's nothing in its path, the condition (distance < 30) triggers, and I get the output "Below the lower limit". Could you explain the reason for this?"