Online service for testing TCP?

Question

Arduino

Hello! Please tell me if there is such an online service for testing TCP. I'm trying to make a GPS tracker with arduino and gprs and want to see if my messages reach the server. The search turned up nothing.

Answer 1

https://httpbin.org/

Answer 2

As an option, you can install your own server and see what comes, for example, OpenGTS.

Answer 3

It's just that you are trying to implement two different tasks at once in one sketch.
You need to write and debug work with a gps tracker - this is one sketch.
Writing and debugging the server is the second sketch.
Connect these tasks in one sketch - this will be the third sketch.
As the Roman proverb says, good oil flows slowly.