Arduino Sensor Data Not Stable - Need Help With Noise Reduction
Jose.Noble 2026-06-25 17:35:20 358 Views1 Replies Hello everyone,
I’m currently working on an Arduino project using a DFRobot sensor (analog input). However, I’m facing an issue where the sensor readings are not stable and keep fluctuating even when the environment is unchanged.
I have already tried basic smoothing using delay() and simple averaging, but the results are still not consistent enough for my project.
Could anyone suggest better methods or libraries to reduce noise and stabilize sensor readings? Also, is there any recommended hardware setup (capacitors, resistors, or shielding) that works well with DFRobot sensors?
Any advice or example code would be greatly appreciated. Thank you in advance!
Analog signal fluctuation is very common, and simple delay() averaging is usually not enough. You can improve stability using:
• Moving average (10–20 samples)
• EMA filter (e.g. 0.8old + 0.2new)
• Median filter (good for spikes)
Hardware tips:
• Add 0.1µF + 1µF capacitors to GND
• Add 1kΩ–4.7kΩ series resistor (RC filter)
• Keep analog wiring short and away from noise sources
Yx 