Implement protocol on own tracker

Hello,

Before all, thanks for this project, it's very amazing what you had done.

I installed the server part on my Rasperry Pi-like (a Banana Pi), and I want to use my own GPS tracker to work with. I built an electronic card, which could connect to the sever through TCP. However, I don't know which protocol use to send data to my server (I'm more electronic than software).

I want to send ID, GPS coordinates, time, battery (% and voltage), and maybe some other infos (like battery car voltage).
Could you advise me to choose a protocol ? Is it just a http request I need to send to log data on my server ?

For now, I could see connexions on the log file, but I don't know how to properly do it.

Thanks for your help (and sorry for the language mistakes)
Thibaud

I would recommend to use following protocol:

https://www.traccar.org/osmand/

It's HTTP based and you can add as many parameters as you want.

You can also take a look at some other protocols if you want here:

https://www.traccar.org/protocols/

Thanks for your quick response.

I tried to use osmand protocol, after adding a new vehicle with 123456 as id. I used this URL :

http://demo.traccar.org:5055/?id=1234567&lat={43.1557}&lon={-1.5688}&timestamp={2}&hdop={3}&altitude={4}&speed={5}

But it doesn't work, and when I look in the log file, I can see the error :

error - For input string: "{43.1557}" - NumberFormatException (... < OsmAndProtocolDecoder:102 < ExtendedObjectDecoder:58 < ...)

It seems to be the same error as this topic :
https://www.traccar.org/forums/topic/error-for-input-string/

Indeed, I'm using the 3.7 version, while there is a 3.8 version.
Does the problem come from this ?
Do I need to erase this version to install the new one, or can I update automatically ? I think not because I have to install it manually ...

Thanks !
Thibaud

In fact, there is no arm version for v3.8 release. Can I still correct the error ? Or should I need to wait the next arm version ?

In your request you should remove curly braces.

There is no need for ARM version, starting from 3.8 Traccar package is universal.

I thought I needed curly braces, that must be the problem.
Unfortunately, I tired to install v3.8, by removing /opt/traccar/ folder. This seems to be a mistake : I can connect to the web interface, but when I send an HTTP request, there's nothing in the log file ... I think I broke all ! I'll try to repair it tomorrow.

Thank you Anton !