Notecarrier F with Feather Adalogger making high-pitched sounds


I started working with my notecarrier again after a few days, and am connecting more sensors to it than before, but it started making high pitched whining/ screeching noises, and I don’t know what it means.


Hi @sbu,

What you are hearing is likely the cellular radio on the Notecard itself when it is transmitting. Definitely nothing to be concerned about!