I’d like this too, found this simple python code that works a treat. I have no idea how to make this a custom component or appdaemon app though
It may not serve everyone’s purpose but I created several overlapping zones with the same name for an area we visit from time to time, works well. Reports people as being in ‘The Woods’ regardless of which actual zone they’re in. You can make all sorts of shapes then.
2 Likes
Didn’t realise you could do that, I have just used your idea, thanks.
I tried creating a group with them in but it doesn’t seem to work
I’ve never tried creating a group - what additional functionality does that give you?
Was going to use it in automations but didn’t work. I can just list all the zones in the triggers I think
ah, OK. I don’t have any automations based on zones outside the house. I just use it to ‘spy’ on my son 
and make sure he’s mostly, roughly where he’s supposed to be.
He is, of course, fully aware of that.
1 Like
As you can get lat and long coridinates from a device tracker you can write a sensor that detects if a device is between two lats and two longs and use that.
This is an area that is parallel to the equator though so not perfect but probably just a bit easier than multiple overlapping circles - But that is a neat idea @eggman I suppose they all add to the tools in our toolbox
Am I the only one who finds this a bit creepy?
Problem with a solution like that is not ‘inside/outside’, it’s the drawing on a map. Pretty sure that’s why a custom component doesn’t exist. Basically need a lot of backend and fronend work to support the shape visually before you can even get the ‘inside/outside’ working.
lol - he works with a volunteer group that manage local woodland, which the council would otherwise let go to rot. Some lovely paths, wildlife areas, gardens, streams kept clear of silt etc.
2 Likes
Creepy ?
Depends if he is also tracking device_tracker_vampire
who is also in the ‘woods’ and sun.sun is below_hozizon
1 Like
Yep, that’s not a rectangle let alone one parallel to the equator
1 Like
I tried the python script above by drawing a polygon in Google earth and getting the vertex coordinates from there. Worked fine for the test I did. The script will say whether a coordinate is inside or outside the polygon.
Don’t think I’d need to draw or display the zone in home assistant if that’s the hard part.
I have been doing something very similar… and to boot it covers about 80 acres of woods as well.
1 Like
Can you share more details and how you integrated it into home assistant?
UPDATED
I’m in no way an expert in this, I’m sure there’s a better way.
You need appdaeamon installing.
I made this appdaemon app from a script I found online:
import hassapi as hass
class PolyZone(hass.Hass):
def initialize(self):
self.log("PolyZone Started")
self.handle = self.listen_state(self.coord_changed, self.args["tracked_device"], attribute = "all")
def coord_changed(self, entity, attribute, old, new, kwargs):
self.run_in(self.point_in_poly, 0)
def point_in_poly(self, kwargs):
zone = str(self.args["poly_zone"]).lower()
name = str(self.get_state(entity_id=self.args["tracked_device"], attribute="friendly_name"))
entity = "binary_sensor." + str(self.get_state(entity_id=self.args["tracked_device"], attribute="entity_id").split(".")[1]) + "_polyzone_" + zone
x = self.get_state(entity_id=self.args["tracked_device"], attribute="latitude")
y = self.get_state(entity_id=self.args["tracked_device"], attribute="longitude")
poly = (self.args["poly"])
self.log(name + " Coordinates: "+str(x)+", "+str(y))
# check if point is a vertex
if (x,y) in poly: self.log("On a Poly Zone Vertex")
# check if point is on a boundary
for i in range(len(poly)):
p1 = None
p2 = None
if i==0:
p1 = poly[0]
p2 = poly[1]
else:
p1 = poly[i-1]
p2 = poly[i]
if p1[1] == p2[1] and p1[1] == y and x > min(p1[0], p2[0]) and x < max(p1[0], p2[0]):
self.log("On the Poly Zone Boundary")
n = len(poly)
inside = False
p1x,p1y = poly[0]
for i in range(n+1):
p2x,p2y = poly[i % n]
if y > min(p1y,p2y):
if y <= max(p1y,p2y):
if x <= max(p1x,p2x):
if p1y != p2y:
xints = (y-p1y)*(p2x-p1x)/(p2y-p1y)+p1x
if p1x == p2x or x <= xints:
inside = not inside
p1x,p1y = p2x,p2y
if inside:
self.log("Inside the Poly Zone")
self.set_state(entity, state = 'on', friendly_name = name + " PolyZone " + zone.title())
else:
self.log("Outside the Poly Zone")
self.set_state(entity, state = 'off', friendly_name = name + " PolyZone " + zone.title())
Add this to apps.yaml, insert all the vertex coords (get them from google earth). Make sure the last one is that same as the first one to create a closed loop:
poly_zone_home:
module: poly_zone
class: PolyZone
tracked_device: device_tracker.xxxxxx_phone
poly_zone: Home
poly: [[53.xxxxxx, -0.xxxxxxx], [53.xxxxxx, -0.xxxxxxx],[53.xxxxxx, -0.xxxxxxx],
[53.xxxxxx, -0.xxxxxxx], [53.xxxxxx, -0.xxxxxxx], [53.xxxxxx, -0.xxxxxxx],
[53.xxxxxx, -0.xxxxxxx]]
A binary sensor will be created to show whether the configured device tracker is within the zone or not
2 Likes
Bumping this as I’d really like it, and I’m afraid the idea that @Holdestmade provided isn’t working for me on the latest version of HA. I’ve double and triple checked that I have all entities and files created and named appropriately, etc. and yet I never see anything more than
2020-12-20 20:53:04.754377 INFO poly_zone_work: PolyZone Started
in the AppDaemon log (so the state of the input boolean never changes and is therefore useless). Fingers crossed something like this becomes easier to do someday!
I too would like this feature. Sure a circle is easy to capture and check, but poly lines aren’t that much harder. Someone did it for you a few comments up, but we need something integrated into HA, not a hack.
Still working fine for me on latest version of ha and appdaemon.