Dog tracking collar: live demo

degraded Pulse 59820324 · 2026-11-13T22:42:12Z · Changes things: lost mode at once; the LED and buzzer only with the owner's confirmation

A GPS collar on a dog. Where the dog is never leaves for the monitor site: only the collar's own health does. HEART runs split: faults are noticed on the collar's microcontroller; the API and monitor reports run on the home base or the maker's server.

Next in its story: power.battery-low in about 8 minutes.

What HEART Hub receives

Only the public Pulse and public alerts: the status and fault codes. Nothing else ever leaves the device.

Status	degraded	public
Battery	49.2 %	public
Battery status	ok	public

What stays on the device

The owner or clinic sees these locally with a key. They are never reported.

Collar temperature	32.9 Cel	internal
Position fix	no fix	internal
Uplink	LTE-M	internal
Report interval	600 s	internal
Lost mode	off	private
In the safe zone	yes	private
Distance from home	328 m	private

Alerts in the last hour

Fault code	Severity	Status	Raised (UTC)	What HEART says
`sensors.no-reading` A sensor gives no value.	warning	open	22:41:05	No position fix. Away from home, 3 failed fixes in a row and 150 s with no position: under trees or indoors.
`sensors.stuck` A reading has not changed when it should have.	error	resolved 22:37:00	22:34:05	The motion sensor is stuck. The same accelerometer reading while GNSS shows the collar moving 40 m or more.
`performance.too-hot` The device is overheating and may slow itself down.	warning	resolved 22:30:00	22:26:05	The collar is too hot. Above 45 Cel. The owner was also warned privately that the dog may be in a hot car.
`system.main-function-degraded` The main job works, but less well than normal.	warning	resolved 22:22:00	22:18:05	The collar may not be on the dog. No breathing movement for 3 minutes, and colder than a worn collar. HEART cannot be sure: check the dog.
`connectivity.link-lost` A network link is down.	warning	resolved 22:08:00	22:04:05	The collar's uplink is lost. Positions wait on the collar until the link is back. The monitor site hears nothing meanwhile.
`power.battery-low` The battery needs charging soon.	warning	resolved 21:58:00	21:50:05	The battery is low. Below 15 %. Charge the collar tonight.
`sensors.no-reading` A sensor gives no value.	warning	resolved 21:45:00	21:41:05	No position fix. Away from home, 3 failed fixes in a row and 150 s with no position: under trees or indoors.

What it changed, and who decided

A replay: the Action log of its one-hour story, the same changes every hour, as the downloadable simulator records them. On this page nothing is really asked, approved or changed.

Time	Change	Started by	Result
22:15	safe zone entered: private event zone.returned	the collar's firmware	sent to the owner only
22:14	lost mode on → off	the owner, the dog found	succeeded at once
22:13	buzzer 40 % for 3 s	the owner (owner key)	succeeded: the owner confirmed; another buzz within 60 s would be refused (22:13 UTC)
22:12	buzzer 80 % for 8 s	the owner (owner key)	refused, 409 guard-failed: above the safe 50 % or 5 s
22:11	LED off → flashing	the owner (owner key)	succeeded: the owner confirmed (proof of presence) (22:12 UTC)
22:11	lost mode off → on (reports every 30 s)	the owner (owner key)	succeeded at once: not physical. Battery about 280 h → about 3 h
22:10	safe zone left: private event zone.left	the collar's firmware	sent to the owner only; never an alert, never to the monitor site

Now do it for your own device and monitor it here: https://heartcortex.ai/monitor. Start from a template, follow the HEART specifications, then register your device with its claim code.

What is inside: the code, how it works, and the specifications it follows · All demo devices

A demonstration that replays a one-hour story. Refreshes every 10 seconds.