1. function description
docking broadcast function through api interface
2. Docking instructions
The broadcast interface is similar to the intercom interface.
2.1 Start broadcasting
'startBroadcast(jsession, lstDevIdno, 0)'
Example: startBroadcast("1234123466881234", "10002,10003,10004", 0);
lstDevIdno indicates multiple devices, intermediate, separated
2.2 stop broadcasting
'stopBroadcast()'
Example: stopBroadcast();
