Need assistance with noise filtering on my digital pressure sensor project

[llimpaull]

I’m working on assembling a digital pressure gauge, and I’ve run into a problem with the noise-filtering stage. I’m using an Arduino Uno R3 to read the data, and then I apply filtering in LabVIEW. However, the filtering doesn’t seem to work at all — it has no noticeable effect. At certain moments the readings suddenly drop to zero, and sometimes they spike unexpectedly, as shown in the pictures.

The pressure sensor I’m using is the MPS20N0040D, and I’m digitizing the signal with an HX711 module set to a gain of 32.

If anyone can help me figure out what’s causing these issues, I would really appreciate it.

Thank you.

    

[altenbach]

Most here cannot open LabVIEW 2025 VIs. To get better help, i recommend to "save for previous" (e.g. LabVIEW 2019) and attach again.

(Why are your charts so messed up? Each has a different size, axis formatting is all over the place)