I also use Cayenne to monitor NKE devices (registered on TTN)
I have just written a tutorial on TTN, about NKE devices : https://www.thethingsnetwork.org/labs/story/monitoring-nke-watteco-devices-on-cayenne
Downlinks can be sent from TTN to NKE devices.
Write the downlink payload for your TTN device in your TTN account :
In this example, I configure the Smart Plug to send standard reports every 30"
Use only FPort 0 (or 125)
Smart Plug configuration frames are described on NKE web site : http://support.nke-watteco.com/power-quality-cluster/#Current
As TTN doesn’t manage class C, downlink configuration frame will be sent as response to the next uplink frame from Smart Plug.
To send uplink frame from your Smart Plug, you can put Smart Plug in ReAssociation mode, either :
- press 3 times the user button
- unplug and re-plug the Smart Plug from power supply