It's not an easy thing to build out, but it seems very reliable to me.
You create 2 Homekit Automations (one for arrive, one for depart,) and they update Hubitat virtual devices. That part is apple easy, the hurdle is to enable automations by having a Homekit hub. AppleTV, HomePod, (always on) iPad.
Next comes Homebridge and a RaspberryPI, Apple Computer or a Linux box can be used. So lots of options to get Homebridge running.
In my case, (the most recent time) I got it started using an iPad that is always on and that worked great, as expected. Then I transferred the Homekit hub to an AppleTV. That worked and still is.
Homebridge is running on my Mac Mini Media Server along with everything else I can get on there. (DNS, DHCP, Web, etc.)
The iPhone's Home App, via Location Services, signals the Homekit hub, which runs the automation that informs Homebridge to set (or reset) the virtual on Hubitat.
Homebridge is really just a Node.js based app, so it works on anything that does node.js, I imagine.
initially thought of hardwiring but it may slowly drain your car battery especially if the step down converter fails. Better to power it off something that disconnects (usb or car lighter) when the car turns off or an independant battery source.
homekit sounds interesting been looking for an excuse to play with a RaspberryPI the only problem is it's Apple!
Thatās why I did the conversion to aa batteries.
They have lasted around a year so far, are really cheap and donāt have any influence on the car if something goes wrong (perfectly possible with a cheap Chinese dc-dc converter)
As I use Presence Central, all my actions are based upon virtual presence sensors so if I have a problem with the sensor, I can just swap it out in PC without having to change any apps that rely on the car presence.
Would shipping costs from the US and duties make the price comparable, or is that one of those sellers gouging customers because the item is not readily available?
Yep. $48 new on Amazon.ca - I'll second @csteele 's suggestion for iPhone and Homebridge if you're a iOS user. It's damn reliable. I've added a two level trigger to mine by using the IFTTT trigger from my TP-Link router. This prevents my front door from opening if I pass out and back into the Geofence area without going up to my house.
Iād like to have arrival and departure notifications, but it drives me nuts when my wife and I leave together and then my phone informs me that she has left. Thatās not a useful notification, I already know weāve left. What I would like is to have a notification only when not leaving together.
I had this set up in webCoRE on smartthings (and briefly hubitat before I nixed webCoRE) but I have not been able to replicate this with the built in hubitat apps. The way I had it working before was that if someoneās presence changed, it would then wait for about 60 seconds and check to see if the other personās presence changed. If they both changed within that minute, it would not send a message. If only one personās presence changed, it would send the message (and I had it send different messages if the other person was home or away).
This worked surprisingly well. 60 seconds seemed to be the sweet spot to eliminate false positives, but short enough that after my wife triggered it, it would finally send right around the time she pulled in the driveway.
I donāt know if this app or your presence app would be a better place for this idea, but Iād love to have this function back.
also: if we leave together, my phone may exit the radius a few seconds before her and then Iāll get the message. Hence the 60 second delay.
The delay is to make up for the imperfect accuracy of the presence sensors.
So, your looking for a configurable delay before checking again to see if both presence sensors have left.
Then if they have, donāt send the message?
Steven, thatās exactly what I use it for (a virtual presence sensor that is also a switch)
There was one on ST called Virtual Presence Plus - I ported it to HE very easily.
Itās on my github if you want a copy.
@Cobra Andy, how do you account for the different states of the different items? I was doing this āmulti device to virtualā before, however I would end up with false home reports. I forget now how I handled it, I think I had all=away, any one return=home, but I always had to manually tweak things as they got out of sync.
Also, from you PC app, are you saying Group 1 is an individual, install per person and group 2 is a macro for lights and alarms?
Iām not sure what you are asking me here
Are you saying Presence Central didnāt work for you?
Iāve been using it for months without problems.
You can use group 1 to combine multiple presence sensors into one - this really helps if any sensor doesnāt report occasionally.
I use this in my āAndyā example above. And I set up a child for each person.
PC does not have any direct control over alarms per se, just switches (and virtual presence sensors that work as a switch)
