With ActiveHome, I had created a timer that turned on a series of lights at dusk. I enabled the Security option and a 15 minute 'before' offset to avoid having the lights come up when it was already quite dark. This setup is not working properly on AHP, at least during Daylight Savings.
My CM15A is always connected to my PC, although AHP is normally not running. I recreated the timer from scratch. Dusk is currently at 18:30. With the 15 minute 'before' offset, the lights came on at 18:15. I temporarily disabled the offset, turned on the Security feature and re-enabled the offset. The lights came on at 19:14, well outside the +/- 30 minutes.
There appears to be all sorts of issues with dusk/dawn timers and the Security setting, but so far I have not come across a good match to my problem. I have seen recommendations that the Security setting must be enabled before any other options are set. The last time I tried to diagnose this problem, believe I did exactly that, to no avail. I have also seen recommendations about having the dusk timer turn on a phantom module.
Any suggestions would be greatly appreciated!