Vega Absolute M-BUS-1, User Manual

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M-BUS-1 / User Manual
31
Revision 10
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27 May 2019
application must make sure that the network server is running at the current data rate at which
the device is running, allowing you to send larger packets. The table below shows the
maximum package sizes for different data rates.
Data rate Spread factor Maximum packet size
DR0 SF12 51 bytes
DR1 SF11 51 bytes
DR2 SF10 51 bytes
DR3 SF9 115 bytes
DR4 SF8 222 bytes
DR5 SF7 222 bytes
5. Output off command
Size in bytes Field description
1 byte Packet type, this packet == 5
1 byte Output no. (1 - 2)
6.
Packet with request of settings – sent by application on LoRaWAN port 3
Size in bytes Field description
1 byte Packet type, this packet == 1
Answering that packet, the device sent the packet with settings.
7. Packet with settings is identical to such packet from device
Size in bytes Field description Data type
1 byte Packet type, this packet == 0
2 bytes ID of parameter uint16
1 byte Data length (len) uint8
len bytes Parameter value -----
2 bytes ID of parameter uint16
1 byte Data length (len) uint8
len bytes Parameter value -----
… … …
2 bytes ID of parameter uint16
1 byte Data length (len) uint8
len bytes Parameter value -----
The package with settings sent to the device may not contain all the settings supported
by the device, but only the part that needs to be changed.