Unknow protocol

Hi,
i have installed traccar on raspberry and i made i test with my tracker..
I see this string

78781f1213010a080d1cca04b2365e01336d6900140000de01af3900723f00c286c80d0a

maybe a GT06. I have registered the IMEI but don't work. What is wrong?

this is the complete log

2019-01-10 09:12:31  INFO: [0ae69660] connected
2019-01-10 09:12:32  INFO: Started o.e.j.s.ServletContextHandler@2f8592{/,null,AVAILABLE}
2019-01-10 09:12:32  INFO: Started ServerConnector@1cf747{HTTP/1.1,[http/1.1]}{0.0.0.0:8082}
2019-01-10 09:12:32  INFO: Started @23724ms
2019-01-10 09:12:32  INFO: [0ae69660: 5001 < 5.170.241.50] HEX: 78780d01035288707588741800bcab1c0d0a
2019-01-10 09:12:32  WARN: Unknown device - 352887075887418 (5.170.241.50)
2019-01-10 09:12:35  INFO: [0ae69660: 5001 < 5.170.241.50] HEX: 78780a13440604000000bd778b0d0a
2019-01-10 09:12:43  INFO: [0ae69660: 5001 < 5.170.241.50] HEX: 78781f1213010a080b3ac804b2364c01336db200140000de01af3900723f00b92e710d0a
2019-01-10 09:12:46  INFO: [0ae69660: 5001 < 5.170.241.50] HEX: 78781f1213010a080c0dc904b2363c01336daf00140000de01af3900723f00ba91670d0a
...

It is GT06 protocol. You need to register device first before connecting it. Looks like you did it the other way around.