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13 Supplement
VEGAPULS Air 23 • Autarkic device with measured value transmission via radio technology
64314-EN-230606
13.2 Radio networks LTE-M and NB-IoT
LTE-M and NB-IoT
LTE-M (Long Term Evolution for Machines) and NB-IoT (Narrow Band Internet of Things) are exten-
sions of the LTE mobile radio standard to IoT applications. Both enable the wireless connection of
mobile, physical objects to the Internet via the mobile network.
You can find more information about the respective mobile phone provider.
13.3 Radio networks LoRaWAN - Data transmission
LoRaWAN
LoRaWAN (Long Range Wide Area Network) is a network protocol for wireless signal transmission
to a corresponding gateway. LoRaWan enables a range of several kilometres outdoors and good
building penetration with low power consumption of the transmission module.
FPort 1
is used for the uplink of the LoRa data packets.
In the following, the necessary device-specific details are shown. You can find further information of
LoRaWAN on
www.lora-alliance.org
.
Data stream, byte order, packet structure
The data are transferred as a byte stream in packets. Each packet is given an identifier at the begin
-
ning which defines the meaning of the following bytes.
Byte sequence according to:
Cayenne Low Power Payload (LPP) Guideline, BigEndian.
Packet 8 is transferred as standard. Alternative packets are required if additional characteristic val-
ues (error status, position) occur in the sensor. The maximum packet size is 52 bytes in Europe and
11 bytes in the USA with maximum spread factor.
A LoRa standard function additionally transmits a packet counter and the serial number of the LoRa
module with every packet.
Packet structure
Packet group
Physical measured value
Information
OK
OK &
GPS
Error
Error &
GPS
Info1
Info2
Packet
8
9
10
11
16
17
Number of bytes
Packet identifier
1
1
1
1
1
1
NAMUR status of the device
1
1
Measured value as floating point number
4
4
4
4
Unit measured value
1
1
1
1
Remaining capacity of the battery in %
1
1
1
1
Location (GNSS)
8
8
VEGA Device status
4
4
Temperature
2
2
2
2
Unit temperature
1
1
1
1