WIRELESS, SENSING and TIMING PRODUCTS
LoRaMote
USER GUIDE
Revision 2.0
– July 2014
Page 18 of 23
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©2014 Semtech Corporation
Byte [8]
>
Value:
MSB of the UP501 received Latitude
Byte [9]
>
Value:
CSB of the UP501 received Latitude
Byte [10]
>
Value:
LSB of the UP501 received Latitude
Byte 8, 9 and 10 represent the latitude as defined by the LoRaMAC specification. The north-south latitude
is encoded using a signed 24 bit word where -
corresponds to 90° south (the South Pole) and
- 1
corresponds to 90° north (the North Pole). The equator corresponds to 0.
Byte [11]
>
Value:
MSB of the UP501 received Longitude
Byte [12]
>
Value:
CSB of the UP501 received Longitude
Byte [13]
>
Value:
LSB of the UP501 received Longitude
Byte 8, 9 and 10 represent the longitude as defined by the LoRaMAC specification. The east-west
longitude is encoded using a signed 24 bit word where -
corresponds to 180° west and
- 1
corresponds to 180° east. The Greenwich meridian corresponds to 0.
Byte [14]
>
Value:
MSB of the UP501 received Altitude
Byte [15]
>
Value:
LSB of the UP501 received Altitude
Byte 14 and 15 represent the value of the altitude (in meters) as it is received through the UP501.
5.3 PER Analysis
It is also important to notice that some of the LoRaMAC protocol frames can be used to perform network
testing such a PER test. A PER test can be perform thanks to the sequence number which is maintained
between the LoRa Server and the LoRaMote. Every packet send from the LoRaMote is numbered and
thus can be extracted from the LoRaMAC on the server side to perform the PER analysis. For more
information on the sequence numbering or on any other aspect of the protocol, please refer to the
LoRaMAC specifications
