Am Thu, Feb 15, 2024 at 12:18:41AM +0100 schrieb Javier Carrasco: > On 14.02.24 09:53, Dimitri Fedrau wrote: > > Add threshold events support for temperature and relative humidity. To > > enable them the higher and lower threshold registers must be programmed > > and the higher threshold must be greater then or equal to the lower > > threshold. Otherwise the event is disabled. Invalid hysteresis values > > are ignored by the device. There is no further configuration possible. > > > > Tested by setting thresholds/hysteresis and turning the heater on/off. > > Used iio_event_monitor in tools/iio to catch events while constantly > > displaying temperature and humidity values. > > > > Signed-off-by: Dimitri Fedrau <dima.fedrau@xxxxxxxxx> > > --- > > Hi Dimitri, > Hi Javier, > now that the decimal part is used, the resolution loss is within the > ranges mentioned in the datasheet. > > For the records: the truncated values lead to alerts slightly lower than > the target alerts. Therefore, measured values below the "comfort zone" > defined by the user (but close to the low alert) will not trigger > events. The other way around is "more secure" because the target comfort > zone is guaranteed: > > -------- High val -> event (as expected) > > ******** Target High Alert > > -------- Meas -> **event** (still in target comfort zone) > > ######## Truncated High Alert > > ... > > ******** Target Low Alert > > -------- Meas -> **no event** (out of target comfort zone) > > ######## Truncated Low Alert > > -------- Meas -> event (as expected) > > But as I said, the resolution loss is in the valid range anyway: > > Tested-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> > > Thank you for adding this feature. > thanks for testing. Best regards, Dimitri Fedrau
