Tracker One speed values

Edge Systems
1

By default, I receive the following data with the default firmware (v. 11) of Tracker One:

"cmd": "loc",
"loc": {
  "alt": 487.633,
  "batt": 58.4,
  "cell": 27.8,
  "h_acc": 11.0,
  "hd": 262.52,
  "lat": 40.12345678,
  "lck": 1,
  "lon": 8.12345678,
  "temp": 19.3,
  "time": 1608300051,
  "v_acc": 11.0
},
"req_id": 161,
"time": 1608300049,
"trig": [
  "lock"
]

I'm interested in speed values. This documentation shows how I could fork the GitHub repository and implement it by myself, but I wonder if it's possible to receive that value without the need of writing and maintaining custom code.

In the 'Configure Fleet' section under 'Location' I have not ticked the 'Minimize Data' checkbox next to this description:

If enabled, publish minimal location with only latitude and longitude. If disabled, publish additional information including speed, heading, etc.

2

There is no way to add speed to the existing publish without using the code in the link above.

3

Ok, is there a particular reason to exclude it in the first place? Any chance this will follow in a couple of months as an option? I would gladly trade temp in exchange to speed for my use-case :slight_smile:

1 Like
4

Particle released a huge update with Tracker Edge Release v12. The loc-enhanced event now contains a whole bunch of extra details with speed (spd) being one of them. I haven’t yet figured out the unit but from other Particle products, I suspect speed to be reported in knots. To get the km/h value, we simply need to multiply the value in knots by 1.852.

5

Actually, disregard the previous post. I found the definition of spd in the source code:

float speed;  /**< Point speed in meters per second */

tracker-edge/location_service.h at 5fc47fc7d9bd1a466fd404fa3e84af0f69b0c0e7 · particle-iot/tracker-edge · GitHub