codes about server to monitor and control remote clients. (ref to syscon-0.4)
The flowchart is as follows:
+--------+ send request(HTTP) +------------+ send cmds(TCP) +--------+
| Web |------------------->| Supervisor |--------------->| Client |
| |<-------------------| server |<---------------| server |
+--------+ send data(HTTP) +------------+ send data(UDP) +--------+