Network-related settings & Others
Join-retry period
This command is used to set the period (T) of LoRaWAN join request sending from the device, in case it was unable to join the network from the first attempt.
Example downlink: 0x10F0 β the server sets the join request period to 20 minutes.
This join retry period (T) must comply to LoRaWAN messages duty cycle. Otherwise the join request will be sent on the next attempt. In most of cases, min. acceptable value for T is 240s. Recommended are higher values, for less battery discharge, e.g. 480s.
This join retry period (T) is for the first 15 sent messages. After, the used LoRaWAN stack automatically changes the possibility to send join request to ~20 minutes for 20 network join attempts. If the device is still not joined to the network after these 20 attempts, next join request can be sent after ~3 hours and 15 minutes.
Communication Watch Dog
There is a Watch Dog functionality that forces the device to reset, so it can rejoin the network in case a certain threshold has been reached where no downlinks have been received. There are 2 independent threshold values, one for confirmed mode and one for unconfirmed mode.
When working in confirmed mode if no downlink is received for the period defined by the Watch Dog Period (WDPconfirmed) parameter (see table below), the device resets itself.
When working in unconfirmed mode if no downlink is received for the period defined by the Watch Dog Period (WDPunconfirmed) parameter (see table below), the device resets itself.
The command is described in the table below. The keep-alive in the response is omitted for clarity.
Example command, [Hex]: 1C0300 β Assuming that the Keep-alive period is 5 minutes, the device will wait for 3x5+7 = 22 minutes before resetting if confirmed uplinks are used. If unconfirmed uplinks are used the functionality is disabled (0x00).
Deep-sleep activation
If you plan to store the device and you want it to conserve maximum power, you can put it to sleep with the following command:
Example downlink: 0x3B01
If you put the device to sleep, you then need to follow the commissioning procedure described in the user manual to wake-up the device.
Full display refresh
In order to protect the display of the device from the so-called "ghosting", where an image becomes permanently imprinted on the e-ink display, we have to refresh it fully every max. 24 hours. If you decide, you can lower the full-refresh period, which can remove some dim artefacts from the display's partial refreshes.
Example downlink: 0x330E - set the full display refresh period to 10 hours.
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