I have a project to put a temperature sensor inside a refrigerator to send the temperature level each 15 min over the WIFI.
-D1 mini board
-Power source is Battery
-Temperature sensors tested are DHT11, DHT22, DS18B20 and BME280
I am comparing the sensor readings against 2 analog temperature gauges
I have finished everything, but still facing the below issues:
-The temperature readings are not matching the real live temperature.
-The DHT11/22 usually stop sending the readings and then resume sending again by itself.
-The DS180B20 keeping starting from low temperature (~1c) reaching to ~6c in about 50 min, then drop to ~1c and start raising again!
Could it be the board is the source of the issue as it is inside the refrigerator?
I need to use an accurate temperature sensor, any suggestions please?