Vega Absolute TP-11, Руководство пользователя

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Vega TP-11 / User Manual
Revision 09
–
08 April 2020
25
5 COMMUNICATION PROTOCOL
This part describes the TP-11 data exchange protocol with LoRaWAN network.
In fields consisting of several bytes, the little-endian byte order is used
CONVERTER TP-11 TRANSMITS THE FOLLOWING TYPES OF PACKETS
1. Packet with current readings from connected heat meter, sent regularly or by the
request or by the one of “Reason of sending message” field events
Size in bytes Field description Data type
1 byte Packet type, this packet == 1 uint8
1 byte Battery level, % uint8
1 byte
Over limits («0» – there is no, «1» - there is) uint8
4 byte
Time of current readings in that packet (unixtime UTC) uint32
1 byte Current device temperature int8
2 bytes Current low threshold (mА*100) uint16
2 bytes Current high threshold (mА*100) uint16
1 byte Reason of sending message uint8
1 byte TP-11 inputs/outputs state uint8
2 bytes Measurement current of connected sensor (mA*100) uint16
“Reason of sending message” field codes
Code Value
0x00 Sending packet by the time
0x01 By the security input 1 triggering
0x02 By the security input 2 triggering
0x03 External power state was change
0x04 Measurement is out of the specified limits
0x05 Transmitting by the request
"Inputs/outputs state" bit field decoding
Bits Field description
0 bit Power (0 – battery, 1 – external)
1 bit Security input 1 (0 - unclosed, 1 – closed)
2 bit Security input 2 (0 - unclosed, 1 – closed)
3 bit Output 1 (0 – off, 1 – on)
4 bit Output 2 (0 – off, 1 – on)
5 bit reserve (always 0)
6 bit reserve (always 0)
7 bit reserve (always 0)