BME280 Humidity Readings ±5% Fluctuation on ESP32

Development Boards ESP32
1

Hi all,

I’m testing the BME280 sensor with ESP32 over I²C. Temperature and pressure are stable, but humidity jumps around ±5% at room temperature.
Tried so far:

  • Different pull-ups (4.7k / 10k)

  • Added delay between reads

  • Power from ESP32 3.3V regulator

Still unstable. Do you usually average multiple samples in software, or is there a better hardware solution?

Thanks!

2

Yes. Humidity sensors are not very stable or accurate, compared to other types you may have used.

3

Try to use the filtering and oversampling to do averaging directly from the hardware→ SparkFun BME280 Breakout Hookup Guide - SparkFun Learn