IDEETRON Nexus LoRaWAN, Manual

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Pagina 6 of 20 14-4-2017
Nexus LoRaWAN
The message type filed can have several values, in Table 5 the different values for the MAC header
are listed.
MAC Header value Hex Message type
60 Unconfirmed data down
A0 Confirmed data down
Table 5: Message types
The frame control field consists of different bits, the most important is bit 5 containing the ACK.
Most of the times the other bits will be 0, so the frame control field can have the following values:
00 – No ACK
20 – ACK
For a full description of the frame control field see the LoRaWAN specification.
When the Nexus receives a Join Accept message after sending a Join request the following data
will be shown:
- Device address
- Network session key
- Application session key
7 Commands
This chapter describes the commands that can be used to communicate with the Nexus using a
terminal program. All commands and data is sent as ASCII characters. All data is one or more bytes
of hexadecimal numbers represented by 2 ASCII characters. So all data exist of 2 ASCII characters
that can be 0 – F. All other characters will be set to 0.
The following command structure is used
Command type Parameter 1 Parameter 2 Value Description
mac
data Maximum of 51 bytes Send LoRaWAN
message with this data
join - Send a Join Request
message
get/set
devaddr 4 bytes The the device address
nwkskey 16 bytes The network session key
appskey 16 bytes The application session
key
drrx 1 byte Transmit datarate
drtx 1 byte Receive datarate
chrx 1 byte Transmit channel
chtx 1 byte Receive channel
pwridx 1 byte Power index
cnf 1 byte Confirmation
chhop 1 byte Channel hopping
class 1 byte Mote class
appkey 16 bytes Application key
deveui 8 bytes Device EUI
appeui 8 bytes Application EUI
Table 6: Command structure