I have a sensor board placed in box with an ESP8266 and 220V to 5V adaptor board which both are considerable heat sources. But sensor is very far away from them at least 5cm.
When I do not close the box it measure air temperature correctly. But when I close the box, it increases by 1 Celcius or so. Also box has air nozzles.
What I wonder is, there a billions of room temperature devices in a box sold on stores. How do they make the right measurement? Is there something like a constant temperature offset can be substracted and real temperature inside the room can be found?