Application Tab; Sensors Gps Demo - Semtech Lora Mote User Manual

3.5 Application Tab

Four applications are currently implemented:
• Sensor GPS demo: the Mote reports back, at pre-defined intervals, information from the set of sensors, along with its
GPS coordinates
• GPS Tracking demo is a slight variation, where the FRMPayload size is reduced by removing most of the sensor
information, except compressed GPS coordinates
• Radio Coverage Tester allows to systematically test Packet Success Rate over a pre-defined number of packets
• Compliance Test incorporate a basic "Echo" application which can be used to test the protocol (Semtech tool)

3.5.1 Sensors GPS Demo

When this application is selected the LoRaMote sends the frames to port 2 and they are formatted as follows:
Figure 3-5: Sensors GPS Demo Frame
Table 3-1: Frame fields description
Frame field
LED
Pressure
Temperature
Altitude (Barometric)
Battery
GPS
Latitude & Longitude
GPS
Altitude
LoRaMoteConfig
User Guide Rev 1.2
UG001_SXC_V1.2 December 2016
0: OFF
1: ON
hPa/10
°C * 100
m * 10
0 The end-device is connected to an external power source.
1..254 The battery level, 1 being at minimum and 254 being at maximum
255 The end-device was not able to measure the battery level
The GPS latitude and longitude fields encode the geographical location as
follows:
• The north-south latitude is encoded using a signed 24 bit word
23
where -2 corresponds to 90° south (the South Pole) and 2
corresponds to 90° north (the North Pole). The equator
corresponds to 0.
• The east-west longitude is encoded using a signed 24 bit word
23
where -2 corresponds to 180° west and 2
180° east. The Greenwich meridian corresponds to 0.
meters
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Conversion
23
corresponds to
Variable type
unsigned 8 bits
unsigned 16 bits
signed 16 bits
signed 16 bits
unsigned 8 bits
23
signed 32 bits
signed 16 bits
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