"...but why do you want to send the configuration payload from the MyController calendar?" for each Node to be autonomous, the principle of distributed intelligence, no centralization, the MyC Controller can be turned off or the link cut (and also to test MyC 🙂 )
"otherwise you can use your arduino sketch program" ... Yes
MyC sends a time setting for the drift of the Arduino and also the management of time slots.
(afterwards the Gateways will have a RTC clock)
Parameters to handler select Resource By Quick ID and add your payload.
I redo a clean installation.
by following the modification of the tuto .
there is an error message for the installation of influxdb
wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
E: This command can only be used by root.