I have OS 2.0 beta (the one with 1.* enclosure and 2.0 hardware) with firmware version 2.0.7 (the last version with the old style UI). My OS looses network connection at least once a week, so I’ve plugged it into home-automation controlled outlet, which is reset every night at midnight. This solution works fine with one caveat – once power for OS goes down, it sends some impulse to every station, triggering a split-second valve reaction. I can’t say valves are opening/closing at this very moment but something is going on and it sends a noticeable pressure surge to all water pipes in the house, quite loud and shaky. There is no pressure surge 5 minutes later when the OS outlet is powered back on.
I’m very reluctant to upgrade to newer firmware; I’ve heard it’s more stable network-wise but do you know if it has the same shutdown problem?
The shutdown issue you are reporting might be due to mechanical issue with the valves. To test, I suggest that you try to turn off OpenSprinkler directly by switching off its power switch. Does the same issue happen? If so, that mean the issue has to do with the sprinkler valves (i.e. the way that they close under water pressure).
I don’t think it has anything to do with valves. When the power is switched off, it looks like OS sends a split-second impulse to all lines, making valves jolt which in turn sends “seismic wave” along water pipes. Again, when power goes off, no sprinkler valve is open (as oppose to your suggestion about “the way they close”).
This is definitely the first time I”ve heard of such an issue. I can’t think of any hardware or software reason that would cause it to send a ‘split-second impulse’. I honestly don’t have any information to explain why it’s doing so.