"serial_number": “{Flood Serial Number}”,
"command" : "set_buzzer",
"volume" : 0, // Volume 15 - off, 0 - min... 14 - max
"frequency" : 1, // range 0 - 10
"active_time" : 2, // seconds; 0 - untill volume 15 is received
"on_time" : 10, // ms; min 10ms
"off_time" : 20 // ms; min 10ms