FIND server is how to use MQTT server and How to connect SDN controller and FIND server to communicate？

[liNimo]

Hello FIND Team
I know that the client and the FIND server using the MQTT protocol to transfer messages. Now there are several questions, FIND server is how to use MQTT server? How the client request data, the server is how to monitor the client? Socket used by the client and server?
Now that I'm building a WLAN network with SDN, I can extract the signal strength from the AP and upload it to the SDN controller. I want to upload the signal strength obtained by the controller to the FIND server, what should I do? In this case, I can not install APP on the phone, you can achieve the positioning of the phone.
I think this is a very interesting thing, indoor positioning does not need to install APP in the phone.
Thank you for your help! @pschmitt @owyongsk @yanzay @fermuch @kootenpv

[FNRC]

Maybe https://github.com/schollz/find-lf could help you.