CR5 // Communication of DOBOT with external devices // TCP/IP connection // Client-server architecture

#1

Greetings friends! I have a problem trying to create a TCP/IP connection. The task is to declare a DOBOT as a Client, and an external connected device as a Server.

I studied this issue and tested using the examples given in SC-Studio (TcpClient, TCPServer). TCPServer is working! And it is also possible to make requests from the client.

Example:

REQUESTS_FROM_THE_CLIENT
REQUESTS_FROM_THE_CLIENT.PNG1365x730 80.9 KB

The program for the server:

lua_code_for_server
lua_code_for_server.PNG700x598 23.4 KB

I didn’t succeed with TcpClient. I have registered the ip address, port.
When running this program:

lua_code_for_client
lua_code_for_client.PNG590x562 19.5 KB

nothing happens, although it is executed (as in the example with the Server)

I think that the client should send requests to the server with a set frequency. But there is no connection to any client on the server.

Example:

No_connection_with_client
No_connection_with_client.PNG1365x727 72.7 KB

I tried changing the values of the socket variable, it didn’t help.
I also tried to just run the code without using the err variable – with no result((
I was also confused by the fact that the code for the server and the client is almost the same except for the true/false value in line 9

Differences_between_server_%26_client_code
Differences_between_server_&_client_code.PNG1332x595 36.2 KB

Please tell me what I’m doing wrong?

#2

Whoever does the server should use the IP address of the server. The figure shows that the computer does the server. The IP address of the input computer should be used instead of the IP address of the robot

#3

Thank you very much!