Vega Absolute VEGA SI-21, Руководство пользователя

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Vega SI-21 / User Manual
Revision 11 – 23 October 2020
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VEGA SI-21 PULSE COUNTER RECEIVES PACKETS OF THE FOLLOWING TYPES
1. Real-time clock adjustment – send by application on LoRaWAN port 4
Size in bytes Field description
1 byte Packet type, this packet == 255
8 bytes The value in seconds for which you need to adjust the time.
Can be positive or negative
2. 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 will send the packet with settings.
3. Packet with settings is identical to such packet from device
Size in bytes Field description Data type
1 byte Packet type, this packet == 0 uint8
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.
Table of ID of SI-21 parameters and these possible values
ID of
parameter Description Data
length Possible values
4 Confirmed uplinks 1 byte 1 – confirmed
2 – unconfirmed
12 Input 1 mode 1 byte 1 – pulse
2 – guard
13 Input 2 mode 1 byte 1 – pulse
2 – guard
14 Input 3 mode 1 byte 1 – pulse
2 – guard
15 Input 4 mode 1 byte 1 – pulse
2 – guard