The M message looks like this:
M:00,01,VgIEAQNCYWQK7WkCBEJ1cm8K8wADCldvaG56aW1tZXIK8wwEDFNjaGxhZnppbW1lcgr
1QAUCCu1pS0VRMDM3ODA0MAZIVCBCYWQBAgrzAEtFUTAzNzk1NDQHSFQgQnVybwICCvMMS0VRMD
M3OTU1NhlIVCBXb2huemltbWVyIEJhbGtvbnNlaXRlAwIK83lLRVEwMzc5NjY1GkhUIFdvaG56a
W1tZXIgRmVuc3RlcnNlaXRlAwIK9UBLRVEwMzgwMTIwD0hUIFNjaGxhZnppbW1lcgQB\r\n
Again a hexdump:
0000000000: 4D 3A 30 30 2C 30 31 2C 56 67 49 45 41 51 4E 43 M:00,01,VgIEAQNC
0000000010: 59 57 51 4B 37 57 6B 43 42 45 4A 31 63 6D 38 4B YWQK7WkCBEJ1cm8K
0000000020: 38 77 41 44 43 6C 64 76 61 47 35 36 61 57 31 74 8wADCldvaG56aW1t
0000000030: 5A 58 49 4B 38 77 77 45 44 46 4E 6A 61 47 78 68 ZXIK8wwEDFNjaGxh
0000000040: 5A 6E 70 70 62 57 31 6C 63 67 72 31 51 41 55 43 ZnppbW1lcgr1QAUC
0000000050: 43 75 31 70 53 30 56 52 4D 44 4D 33 4F 44 41 30 Cu1pS0VRMDM3ODA0
0000000060: 4D 41 5A 49 56 43 42 43 59 57 51 42 41 67 72 7A MAZIVCBCYWQBAgrz
0000000070: 41 45 74 46 55 54 41 7A 4E 7A 6B 31 4E 44 51 48 AEtFUTAzNzk1NDQH
0000000080: 53 46 51 67 51 6E 56 79 62 77 49 43 43 76 4D 4D SFQgQnVybwICCvMM
0000000090: 53 30 56 52 4D 44 4D 33 4F 54 55 31 4E 68 6C 49 S0VRMDM3OTU1NhlI
00000000A0: 56 43 42 58 62 32 68 75 65 6D 6C 74 62 57 56 79 VCBXb2huemltbWVy
00000000B0: 49 45 4A 68 62 47 74 76 62 6E 4E 6C 61 58 52 6C IEJhbGtvbnNlaXRl
00000000C0: 41 77 49 4B 38 33 6C 4C 52 56 45 77 4D 7A 63 35 AwIK83lLRVEwMzc5
00000000D0: 4E 6A 59 31 47 6B 68 55 49 46 64 76 61 47 35 36 NjY1GkhUIFdvaG56
00000000E0: 61 57 31 74 5A 58 49 67 52 6D 56 75 63 33 52 6C aW1tZXIgRmVuc3Rl
00000000F0: 63 6E 4E 6C 61 58 52 6C 41 77 49 4B 39 55 42 4C cnNlaXRlAwIK9UBL
0000000100: 52 56 45 77 4D 7A 67 77 4D 54 49 77 44 30 68 55 RVEwMzgwMTIwD0hU
0000000110: 49 46 4E 6A 61 47 78 68 5A 6E 70 70 62 57 31 6C IFNjaGxhZnppbW1l
0000000120: 63 67 51 42 0D 0A cgQB..
In case the data does not fit into one single M-message, the MAX!Cube will send another one immediately afterwards.
Here is an example:
M:00,02,VgIMAQpXb2huemltbWVyCvMrAgtUb2lsZXR0ZSBFRwrenQMOVG9pbGV0dGUgMS4gT0cK3rgEC
kJhZGV6aW1tZXIK3qoFDFNjaGxhZnppbW1lcgresQYDSmFuD4lCBwlDaHJpc3RpbmEPiTYIBEZsdXIPiT
0KEEJhZGV6aW1tZXIgMi4gT0cPiRwLBULDvHJvD4k/DAxHw6RzdGV6aW1tZXIPiRoJC1dhc2Noa8O8Y2h
lD4lXNgQHOCtLRVEwMTg4NjczCFRlcnJhc3NlAQQHMblLRVEwMTg3MTkwCEZsdXJ0w7xyAQIK8ytLRVEw
Mzc5NTg3C1dhbmRoZWl6dW5nAQIK9P9LRVEwMzgwMDU1DkZlbnN0ZXJoZWl6dW5nAQQHMbtLRVEwMTg3MT
g4CEZsdXJ0w7xyAgQHMuxLRVEwMTg2ODg0B0ZlbnN0ZXICAQrenUtFUTA0MDY5NjIHSGVpenVuZwIBCt64
S0VRMDQwNjk4OQdIZWl6dW5nAwQIFGdLRVEwMTkwNTc3B0ZlbnN0ZXIDBAc2l0tFUTAxODU5NDUIRmx1cn
TDvHIEAQreqktFUTA0MDY5NzUHSGVpenVuZwQBCt8JS0VRMDQwNzA3MA5IYW5kdHVjaGVpenVuZwQEBzhT
S0VRMDE4ODcxMAdGZW5zdGVyBAQIFIxLRVEwMTkwNTQzFkZlbnN0ZXIgU3RyYcOfZSByZWNodHMFAQresU
tFUTA0MDY5ODIHSGVpenVuZwUEBzHmS0VRMDE4NzE0NhVGZW5zdGVyIFN0cmHDn2UgbGlua3MFAxBXqUxF
UTA5ODIxNTYOV2FuZHRoZXJtb3N0YXQBBA/u1ExFUTA3OTQ3NTIIRmx1cnTDvHIGBA/v6kxFUTA3OTQ0Nz
QNRmVuc3RlciBsaW5rcwYED/HnTEVRMDc5Mzk2NA5GZW5zdGVyIHJlY2h0cwYBD4lCTEVRMTAwNDYwMAdI
ZWl6dW5nBgQP9BVMRVEwNzkzNDA2CEZsdXJ0w7xyBwQP79FMRVEwNzk0NDk5B0ZlbnN0ZXIHAQ+JNkxFUT
EwMDQ1ODgHSGVpenVuZwcBD4k9TEVRMTAwNDU5NQ1IZWl6dW5nIHVudGVuCAEPiRxMRVExMDA0NTYyB0hl
aXp1bmcKBA/yTUxFUTA3OTM4NjIHRmVuc3RlcgoED/F+TEVRMDc5NDA2OQhGbHVydMO8cgoBD4k/TEVRMT
AwNDU5NwdIZWl6dW5nCwQP8YdMRVEwNzk0MDYwB0ZlbnN0ZXILBA/xSExFUTA3OTQxMjQIRmx1cnTDvHIL
BA/yVkxFUTA3OTM4NTMURmVuc3RlciBHYXJ0ZW4gbGlua3MMBA/yI0xFUTA3OTM5MDQVRmVuc3RlciBHYX
J0ZW4gcmVjaHRzDAEPiRpMRVExMDA0NTYwB0hlaXp1bmcMBA/vj0xFUTA3OTQ1NjUPRmVuc3RlciBTdHJh
w59lDAQP8CtMRVEwNzk0NDA5BFTDvHIDBAgUa0tFUTAxODcwNjkNRmVuc3RlciBTZWl0ZQUEBzagS0VRMD
E4NTkzNhVGZW5zdGVyIFN0cmHDn2UgbGlua3MBBA/wI0xFUTA3OTQ0MTYORmVuc3RlciBLw7xjaGUBAxBV
50xFUTA5ODI2NzYOV2FuZHRoZXJtb3N0YXQFAxBW2kxFUTA5ODIzNjgOV2FuZHRoZXJtb3N0YXQEAxBV4k
xFUTA5ODI2NzEOV2FuZHRoZXJtb3N0YXQHAxBZWExFUTA5ODE3MjkOV2FuZHRoZXJtb3N0YXQMAxBV6ExF
UTA5ODI2NzcOV2FuZHRoZXJtb3N0YXQGAxBV40xFUTA5ODI2NzIOV2FuZHRoZXJtb3N0YXQKBAcxoEtFUT
AxODcyMTYLV2FzY2hrw7xjaGUF\r\n
M:01,02,AxBV8ExFUTA5ODI2ODUOV2FuZHRoZXJtb3N0YXQJBA/v50xFUTA3OTQ0NzcNQmFsa29uZmVuc3
RlcgkBD4lXTEVRMTAwNDYyMRZIZWl6dW5nIHVudGVybSBGZW5zdGVyCQQP8llMRVEwNzkzODUwDkZlbnN0
ZXIgcmVjaHRzCQQP8bxMRVEwNzk0MDA3DUZlbnN0ZXIgbGlua3MJAQ+JOExFUTEwMDQ1OTAOSGVpenVuZy
BCYWxrb24JBA/yLExFUTA3OTM4OTUKQmFsa29udMO8cgkED++zTEVRMDc5NDUyOQhGbHVydMO8cgkB
Here is the structure less clear than in an H Message. First we need to clip the first and the last two bytes (removing the M: and CR+LF) The Message is comma seperated into 3 parts.
Description Length Example Value
=====================================================================
Index 2 00
Count 2 01
Data variable base64 encoded
The 00 is the index. When there are multiple M-messages send by the cube, this number will be increased with each message.
The second part, 01 is the count. This indicates the current number of the M-messages.
The data string is base64 encoded and contains the real data of this package. If we decode this string we get this data:
0000000000: 56 02 04 01 03 42 61 64 0A ED 69 02 04 42 75 72 V....Bad..i..Bur
0000000010: 6F 0A F3 00 03 0A 57 6F 68 6E 7A 69 6D 6D 65 72 o.....Wohnzimmer
0000000020: 0A F3 0C 04 0C 53 63 68 6C 61 66 7A 69 6D 6D 65 .....Schlafzimme
0000000030: 72 0A F5 40 05 02 0A ED 69 4B 45 51 30 33 37 38 [email protected]
0000000040: 30 34 30 06 48 54 20 42 61 64 01 02 0A F3 00 4B 040.HT Bad.....K
0000000050: 45 51 30 33 37 39 35 34 34 07 48 54 20 42 75 72 EQ0379544.HT Bur
0000000060: 6F 02 02 0A F3 0C 4B 45 51 30 33 37 39 35 35 36 o.....KEQ0379556
0000000070: 19 48 54 20 57 6F 68 6E 7A 69 6D 6D 65 72 20 42 .HT Wohnzimmer B
0000000080: 61 6C 6B 6F 6E 73 65 69 74 65 03 02 0A F3 79 4B alkonseite....yK
0000000090: 45 51 30 33 37 39 36 36 35 1A 48 54 20 57 6F 68 EQ0379665.HT Woh
00000000A0: 6E 7A 69 6D 6D 65 72 20 46 65 6E 73 74 65 72 73 nzimmer Fensters
00000000B0: 65 69 74 65 03 02 0A F5 40 4B 45 51 30 33 38 30 eite....@KEQ0380
00000000C0: 31 32 30 0F 48 54 20 53 63 68 6C 61 66 7A 69 6D 120.HT Schlafzim
00000000D0: 6D 65 72 04 01 mer..
The message contains metadata about the rooms and the devices in this rooms.
The first part of this block of data contains the room data for all configured rooms. The room data is of variable length.
0000000000: 56 02 V.
At the moment i cannot say what these two bytes are.
0000000000: 04 .
The room count says how many rooms are configured.
0000000000: 01 03 42 61 64 0A ED 69 ..Bad..i
On the room count follow the room data for as many rooms as the room count is, here 4 times.
The meaning of the room data is the following:
Description Length Example Value
=====================================================================
Roomid 1 1
Roomname length 1 3
Roomname variable Bad
Group RF Address 3 0AED69
0000000000: 01 .
This is the configured room ID.
0000000000: 03 .
This tells us how much of the following bytes are the roomname.
0000000000: 42 61 64 Bad
The roomname is as many bytes long as the rommname length.
A roomname length of 03 means one must read the next 3 bytes 42 61 64 which is Bad in ASCII.
0000000000: 0A ED 69 ..i
These 3 bytes are the Group RF Address of the first device in that room.
This is wat is left after decoding the rooms:
0000000030: 05 02 0A ED 69 4B 45 51 30 33 37 38 ....iKEQ0378
0000000040: 30 34 30 06 48 54 20 42 61 64 01 02 0A F3 00 4B 040.HT Bad.....K
0000000050: 45 51 30 33 37 39 35 34 34 07 48 54 20 42 75 72 EQ0379544.HT Bur
0000000060: 6F 02 02 0A F3 0C 4B 45 51 30 33 37 39 35 35 36 o.....KEQ0379556
0000000070: 19 48 54 20 57 6F 68 6E 7A 69 6D 6D 65 72 20 42 .HT Wohnzimmer B
0000000080: 61 6C 6B 6F 6E 73 65 69 74 65 03 02 0A F3 79 4B alkonseite....yK
0000000090: 45 51 30 33 37 39 36 36 35 1A 48 54 20 57 6F 68 EQ0379665.HT Woh
00000000A0: 6E 7A 69 6D 6D 65 72 20 46 65 6E 73 74 65 72 73 nzimmer Fensters
00000000B0: 65 69 74 65 03 02 0A F5 40 4B 45 51 30 33 38 30 eite....@KEQ0380
00000000C0: 31 32 30 0F 48 54 20 53 63 68 6C 61 66 7A 69 6D 120.HT Schlafzim
00000000D0: 6D 65 72 04 01 mer..
The device count is, like the room count, the indicator of how many devices are registered.
0000000030: 05 .
0000000030: 02 0A ED 69 4B 45 51 30 33 37 38 ...iKEQ0378
0000000040: 30 34 30 06 48 54 20 42 61 64 01 02 0A F3 00 4B 040.HT Bad.....K
The meaning of the room data is the following:
Description Length Example Value
=====================================================================
Devicetype 1 2
RF Address 3 0AED69
Serialnumber 10 KEQ0378040
Device name length 1 6
Device name variable HT Bad
Room id 1 1
0000000030: 02 .
The devicetype indicates what type of device it is:
0 Cube
1 Heating Thermostat
2 Heating Thermostat Plus
3 Wall mounted Thermostat
4 Shutter contact
5 Push Button
0000000030: 0A ED 69 ..i
These 3 bytes are the RF Address of the device, here it is 0AED69.
0000000030: 4B 45 51 30 33 37 38 KEQ0378
0000000040: 30 34 30 040
The devices serial number KEQ0378040
0000000040: 06 .
The number of bytes that contain the room name directly after this byte.
0000000040: 48 54 20 42 61 64 HT Bad
The device name, HT Bad in this case.
0000000040: 01 .
The id of the room that contains this device.