Xabi Alaez asked 6 years ago
Hi Rui and everyone,
I designed and ordered some PCBs to use with a FireBeetle ESP32 board and a SHT31 Temperature and Humidity sensor.
The problem is that I detected that the sensors are measuring +2ºC comparing to measuring with the same sensor in a protoboard.
I know the correct measure is the one in the protoboard because I compared it with a calibrated sensor. What could be causing this error in the measures with the PCB?
I also measured the input Voltage of the sensor in the PCB and it seems to be perfect (3,299V).
Should I make the SDA and SCL tracks wider? Or thiner?
Thank you in advance!
Xabi
Rui Santos Staff answered 6 years ago
Hi Xabi, that sensor is a digital sensor, so I don’t think making the SDA/SCL tracks wider will make the readings more accurate. Is the sensor solder directly to the PCB? Sounds like the PCB might be heating the sensor a bit…