I am struggling with a GSM GPS tracker. It looks like a clone of GT02A, and it is a relatively common model.
My problem is that when it sends data to my server, it is not readable. I set it to send on port
333 and then on server I am listening on port
333 and the string received (looking in Putty terminal) looks like this:
Rg!r▒▒▒ xx ;▒ ▒1▒▒[▒F▒f▒W ▒1▒▒▒[▒F▒f▒W ▒13▒▒[▒F▒f▒W ▒ xx }▒ ▒1▒▒[▒F▒f▒W xx ▒1 :m▒F▒f▒W ▒1!▒u▒F▒f▒W xx "▒/ ▒1#▒▒▒F▒f▒W ▒1$▒▒[▒F▒f▒W ▒1%o▒[▒F▒f▒W
Can anyone tell what the problem is or if this string is a HEX or binary string of some kind that needs to be decoded ? The device seems to work fine if I request the location by SMS, it sends it correctly, so it is not fried or anything.