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User Manual v1.4.3
HYDRODIGIT
LoRaWAN (COMBO, output configuration LoraWAN only)
This section describes the management of the communication standard LoRaWAN interfaced with
LoRaWAN 1.0.3 specification.
Join LoRaWAN
The join procedure starts after the digital meter has accounted ±5 liters (5 liters positive or negative flow)
which will last 8 minutes at maximum. When the joining procedure is finished, the first LoRaWAN packet is
sent after 5 seconds.
If the Join procedure fails, the meter will attempt again after 12 hours. If this attempt fails again, the meter
will try again for after 36 hours.
After 36 hours have passed and the Join has failed, the next join request will be attempted after one week.
In case it fails again, it will attempt once a week for 5 weeks. After 5 weeks, if the meter still hasn’t joined, it
will retry once a month for 10 months.
In the event all these attempts fail, the user is forced to send a Join command via IR interface. The Join
command via IR can be sent anytime via B METERING software.
Link Check
After the Join procedure is completed successfully, the meter will enable the Link Check function, sending
a message to the Network Server (no distinction on the transmission frequency set – every 12 or 6 hours
for ordinary uplinks).
The Link Check will be sent with a SF12 message.
This will cover two main issue cases:
1. NetworkServer-related issues: e.g. LoRaWAN or session keys elimination, crash of the network server etc.
2. Meter installation at a different location (greater distance) with respect to where the JOIN was performed
(e.g JOIN completed in the office near the Gateway with SF7 and installation on site few km away where
SF12 is required).
