Here is the version 1.0 of the RS232 commands for Myro:Bridge/Sonos Firmware (v2.2.0 and above):
Baud Rate: 9600
Data Bits: 8
Parity: None
Stop Bits: 1
REQ = Request
RES = Response
[TRANSPORT_STATUS] Types: Unknown = 0, Stopped = 3, Playing = 1, Paused = 2
[MEDIA_TYPE] Types: Music Library =3, Radio = 1, Pandora = 2, Rhapsody = 4, XM = 5, Windows Media Music Library Server = 6
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REQ: *IP_ADDRESS<cr>
RES: #4372|XXX.XXX.XXX.XXX<cr>
REQ: *VER<cr>
RES: #522|2.2.0<cr>
REQ: *NEXT_TRACK<cr>
RES: #4385|OK<cr>
REQ: *PREV_TRACK<cr>
RES: #4364|OK<cr>
REQ: *PAUSE<cr>
RES: #1220|OK<cr>
REQ: *PLAY<cr>
RES: #848|OK<cr>
REQ: *ALBUM<cr>
RES: #1218|[ALBUM TITLE]<cr>
REQ: *ARTIST<cr>
RES: #1783|[ARTIST TITLE]<cr>
REQ: *SONG<cr>
RES: #824|[SONG TITLE]<cr>
REQ: *STREAM_TYPE<cr>
RES: #5413|[STREAM_TYPE]<cr>
REQ: *ALL_META<cr>
RES: #2849|[STATUS_TEXT]|[ALBUM]|[ARTIST]|[SONG]<cr>
REQ: *STATUS<cr>
RES: #1796|[STREAM_TYPE]|[STATUS_TEXT]|[TRANSPORT_STATUS]<cr> (example: #2A|Initializing...|3<cr>)
REQ: *DEVICE_NAME<cr>
RES: #5064|[DEVICE_NAME]<cr>
REQ: *MEM<cr>
RES: #498|[FREE MEM]<cr>
REQ: *ID<cr>
RES: #258|[ID]<cr>
EVENT WHEN METADATA/STATUS CHANGES:
RES: @[STREAM_TYPE]|[STATUS_TEXT]|[TRANSPORT_STATUS]|[ALBUM]|[ARTIST]|[SONG]<cr>
