Xiaomi WiFi Speaker support

[syssi]

-> 192.168.2.44 data= {"id":2893,"method":"get_prop","params":["umi"]}
<- 192.168.2.103 data= {"result":["{ \"DeviceName\": \"Mi Internet Speaker\", \"channel_title\": \"音箱下载\", \"current_state\": \"PLAYING\", \"hardware_version\": \"S602\", \"play_mode\": \"REPEAT_ALL\", \"track_artist\": \"Kygo&M83\", \"track_duration\": \"00:04:58\", \"track_title\": \"Wait(Remix)\", \"transport_channel\": \"PLAYLIST\" }"],"id":2893}
-> 192.168.2.44 data= {"id":2894,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:04:00"],"id":2894}
-> 192.168.2.44 data= {"id":2895,"method":"power","params":[]}
<- 192.168.2.103 data= {"result":"ok","id":2895}
-> 192.168.2.44 data= {"id":2896,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:04:02"],"id":2896}
-> 192.168.2.44 data= {"id":2897,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:04:03"],"id":2897}
-> 192.168.2.44 data= {"id":2898,"method":"vol_up","params":[5]}
<- 192.168.2.103 data= {"result":"ok","id":2898}
-> 192.168.2.44 data= {"id":2899,"method":"vol_down","params":[5]}
<- 192.168.2.103 data= {"result":"ok","id":2899}
-> 192.168.2.44 data= {"id":2900,"method":"previous_track","params":[]}
<- 192.168.2.103 data= {"result":"ok","id":2900}
-> 192.168.2.44 data= {"id":2901,"method":"next_track","params":[]}
<- 192.168.2.103 data= {"result":"ok","id":2901}
-> 192.168.2.44 data= {"id":2902,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:00:00"],"id":2902}
-> 192.168.2.44 data= {"id":2903,"method":"get_prop","params":["umi"]}
<- 192.168.2.103 data= {"result":["{ \"DeviceName\": \"Mi Internet Speaker\", \"channel_title\": \"音箱下载\", \"current_state\": \"PLAYING\", \"hardware_version\": \"S602\", \"play_mode\": \"REPEAT_ALL\", \"track_artist\": \"Kygo&M83\", \"track_duration\": \"00:04:58\", \"track_title\": \"Wait(Remix)\", \"transport_channel\": \"PLAYLIST\" }"],"id":2903}
-> 192.168.2.44 data= {"id":2904,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:00:08"],"id":2904}
-> 192.168.2.44 data= {"id":2905,"method":"next_channel","params":[]}
<- 192.168.2.103 data= {"result":"ok","id":2905}
-> 192.168.2.44 data= {"id":2906,"method":"get_prop","params":["rel_time"]}
<- 192.168.2.103 data= {"result":["00:00:00"],"id":2906}

Capture of @octa22. Thanks!

cp. aholstenson/miio#41.

[rytilahti]

Closed with #291.