Allow specifying how often the measurements should be given #2
Description
The devices allow the user to increase/decrease the frequency at which the measurements are given, by pressing (and releasing) Caps Lock and Num Lock while the device is running.
The program should have a parameter that makes it simulate a press of either one a given number of times, so as to make the device use the resulting measurement frequency instead of its default (which appears to vary between devices).
It may also be useful to allow the frequency to be changed while the program is running, through as yet undetermined means (signals, stdin, dbus, whatever), but that's a separate issue that should be added as such if and when a use case is found.