Vega Absolute VEGA TD-11, User Manual, Page: 17 / 25

Vega TD-11 / User Manual
17
Revision № 06 – 10 August 2021
4 COMMUNICATION PROTOCOL
This part describes the TD-11 communication protocol with LoRaWAN
®
network.
In fields consisting of several bytes, the little endian byte order is used
SENSOR VEGA TD-11 TRANSMITS THE FOLLOWING TYPES OF PACKETS
1. Packet with current readings
Sent regularly on LoRaWAN port 2
Size in bytes Field description Data type
1 byte Packet type, this packet == 1 uint8
1 byte Battery level, % uint8
1 byte Overlimits (“0” – no overlimits, “1” – there is overlimit) uint8
4 bytes Time of sending readings (unixtime UTC) uint32
2 bytes Current temperature in °C multiplied by 10 int16
1 byte Temperature low threshold Int8
1 byte Temperature high threshold Int8
1 byte Reason of sending message uint8
1 byte TD-11 inputs/outputs state uint8
If thermistor is not connected to the TD-11 (contacts «Therm» and « »), in
the «Temperature» field will be sent an -1000 value for breakage or fault
indication. In case of thermistor short circuit will be sent an -1270 value
"Inputs state" bit field decoding
Bits Field description Value
0 bit Security input state “0” – short, “1” – open
1 bit Tamper state “0” – case not open, “1” – case open
2 bit Hall sensor 1 state “0” – sensor triggered, “1” – sensor not
triggered
3 bit Hall sensor 2 state “0” – sensor triggered, “1” – sensor not
triggered
4 - 7 bits not used