Server ports are busy

Blynk Servers Local Blynk Server
1

Hi, i want to host a local server and i am having trouble starting the jar file, the error says

Server ports are busy, most probably server already launched.

But it is not. I even restarted my computer.

Are there any other ports that we can use for starting it ? Or any other advice ?

Thank you.

2

Hi. Yes.

By default starts 7 servers on different ports:

1 server socket for SSL/TLS Hardware (8441 default)
1 server socket for plain tcp/ip Hardware (8442 default)
1 server socket for SSL/TLS Applications (8443 default)
1 server socket for HTTP API (8080 default)
1 server socket for HTTPS API (9443 default)
1 server socket for MQTT (8440 default)
1 server socket for Administration UI (7443 default)

You may find exactly problem in blynk.log file.

3

i put 81 as http api server its ok ?
Thank you for your quick answer.

4

It depends on your system. Some OSes restrict access to port like 81 without admin/root rights.

5

So what should i do to learn about what ports i should use for these 7 servers ?

thanks

6

It is up to you. Check log, see that port caused your trouble, change it. That’s it.