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FIELD TEST DEVICE - LoRaWAN Europe - User Guide V1.2.0
The screen will display:
•
The number of frames sent (UL COUNT), including repetitions
•
The number of frames received (DL COUNT)
•
The Packet Error Rate (PER) as a percentage
The PER measurement is calculated by comparing the number of frames transmitted to the number of frames received:
•
PER (%) = (DL_COUNT/UL_COUNT) * 100
3.6. Downlink screen
This menu can be accessed by briefly pressing on pushbutton 2 after the PER menu. It will allow you to view a downlink frame sending by the
network. This frame is displayed in ASCII caracters. The non printable caracters are replace by a point.
GB
The screen allow a viewing of 51 caracters (17 caracters per lines). If the size of the payload is upper than 51 bytes, the product will not display
the extra bytes.
4. DECODING THE PAYLOAD
The size of the Field Test Device's payload can vary depending on the information transmitted. The first byte will enable you to identify the pres-
ence of information contained in the payload. Information will always be shown in the order indicated in the following table.
Example of a payload received: BF1B45159690005534502720200FC95207
This example will be used in order to explain how the payload is decoded.
Order
1
Number of bytes
1
Description
Statut Temperature
Example
BF
4.1. Status
Hex
Décimal
1
0
1
1
BF
1
1
1
1
0: Data missing from the payload
1: Data present in the payload
Barre de statuts
Zone d'affichage
de la trame
2
3
1
4
GPS Latitude
1B
45 15 96 90 00 55 34 50
N°
Bit N°
7
Presence of temperature information
6
Transmission triggered by the accelerometer
5
Transmission triggered by pressing pushbutton 1
4
Presence of GPS information
1
3
Presence of Uplink frame counter
2
Presence of Downlink frame counter
1
Presence of battery level information
1
Presence of RSSI and SNR information
Figure 12 : Ecran Downlink
4
5
4
1
GPS
GPS Longitude
Qualité
Counter
27
Commentaires
6
7
8
9
1
1
2
1
DL
UL
Battery
Coun-
RSSI SNR
level
ter
20
20
0F C9
52
Valeur
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
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