Thank you for your answer.
I used WiaTag, but it was not working very well on my phone, The speed was OK with wiatag, but it’s about the connection with your servers, WiaTag were loosing connection. I was obliged to stop and restart WiaTag in order to connect again…
Traccar seems to connect better, i don’t know why ! but my problem with Traccar is only Km/h.
So, as you said,, i will send you my Traccar ID and my username by mail.