When does BikeTrax record the Positions / Trips?
Which parameters determines a complete ride in the powunity app?
The tracker always records, even if it is only moved 10m. If you use the /positions API then you always get all the positions that the tracker has sent for the period.
But there is a difference in when the server (or the app) detect and show it as a trip (via the /trips API). The following parameters are used in the detection algorithm:
minimal trip duration - Trips of less than 130 seconds are ignored.
minimal trip distance - Trips of less than 215 meters are ignored.
minimal parking duration - Parking for less than five minutes does not detected as stop.
minimal no data duration - Gaps in reported positions longer than one hour are considered as stops.
ignition - Force switch to stop state if eBike is switched off.
Following is an example to illustrate how it works:
Trip 1 is detected correctly, because the period started from zero speed (initialized as stopped), the distance is longer than 215 meters or the duration is longer than 130 seconds, and it is followed by a stop longer than minimal parking duration.
Stop 1 is detected because it has a duration longer than the minimal parking duration and the speed is close to zero.
Trip 2 is also detected correctly from row 27 on, rows 24-25 are ignored as fluctuation. Parameters are more than minimal, and it started and followed by positions with zero speed.
Why and how straight lines occur and what does it imply on the status of the tracker?
If the bike is located in a garage (without GPS reception) and is immediately driven away from there, the GPS needs longer until it gets a position and the start / first position is then correspondingly later. This is because the GPS fix can take up to one minute, especially if the tracker is moving.
What is the meaning of the tracker status/values and columns of the route report?
When selecting a tracker, the “State” panel on the left shows you the relevant variables and their values as seen on the last reported position of the device. Those are also the meaningful columns to display in the “Route” reports.
Generally the GPS server supports many different tracker manufacturers with varying use cases, but for us the interesting columns are:
Device Name
Time
Latitude
Longitude
Speed - in knots/hour
Alarm - with possible values:
vibration - when tracker is moved / shaken
movement - when
powerCut (bike switched off),, speed,…
lowBattery - when backup battery state is getting low
Hours - duration the tracker was moving / operated
Input - will include the data as received from CAN bus
Battery Level - SOC of the backup battery
Ignition and Charge - if tracker has external power supply (e.g. bike switched on / off)
Distance - to previous position
Total Distance - since tracker was created / added to platform
Motion - tracker moving yes / no
Armed - if the trackers vibration alarm is switched on (this should mostly be true)
How to switch the speed unit from nautical speed (kn) to km/h or mph?
You can switch the default setting using the following steps:
Please consider that the app is currently expecting kn speed, so when you change this the speed within the PowUnity app will not be displayed correctly.
What do the events mean?
Status online: when tracker sent the first message after being offline
Status offline: when no message is received for 200 seconds tracker is considered offline
Alarm: see above
Ignition on: when bike gets switched on
Ignition off: when bike gets switched off
Machine moving: when tracker starts moving (see trip algorithm above)
Machine stopped: when tracker stops moving (see trip algorithm above)
Is there a particular cadence of events when a ride starts?
Typically:
“Status Online" when bike is slightly moved
"Alarm vibration” when bike is moved more
"Ignition on” once bike gets switched on
“Moving” once bike rides at least 215 meters or for 130 seconds
What does the Stops report tell us?
Whenever the trip calculation algorithm detects a stop (see trip algorithm above)
Which software is the best way to install the new trackers? Powunity app or Traccar?
The app does more checks (1. is tracker online, 2. Is GPS available) which is what we recommend to make sure the tracker is working properly after installation.
If you add the tracker in Traccar there are no checks made at all, which can be convenient if you have to add several trackers at once.
Why are there straight lines in the trip?
Both of the above should not happen in an ideal world. Usually this is related to a bad GPS reception:
The tracker is in an area with no / bad GPS reception like: indoor parking, tunnel, narrow valley,…
The tracker was not properly installed within the bike: PowUnity symbol not pointing outwards or put inside the frame (covered with metal)
In case the tracker was offline for a longer period it will take longer to get the first GPS fix, so the beginning of the ride might will have a straight line (from old location to first fix).
If the tracker was working flawlessly before, which means a proper installation in the bike is given, please contact our technical support.
Why would the tracker show it is active and send a GPS signal at an old location?
There is no GPS reception but the tracker was moved or sends a heartbeat (update). If the status (alarm, SOC, ….) has changed then the server will use the last known location with the latest status.
How are Alarms / Push Notifications delivered?
There are two ways how the push notification (which triggers the sound) is handled by the app depending on it’s state:
The app is in the background (or not running):
none of our app code is run -> the push is handled only by the OS / browser. In that case the alarm will only sound for a few seconds and then stop - unless the backend / server sends another push because the device is still moving and movement alarm was triggered again.The app is in the foreground:
Notification is handled by our app code and we start playing the alarm sound in a loop until the user switches if off (by toggling the alarm button).