Thank you @eiten for you suggestion. I will try it.
I wanted to be independent from HA, just as a fail safe in case of problems.
I am not relying on the time keeping of the arduino, but on a real time clock module.

Hi all,

I want to replace the simple timer controller of the pool with an arduino based using a real time clock and communicating with home assistant using mysensors/mqtt.

Right now I am able to control the filter relay with the arduino/mysensors like a simple switch. However I want to send a timer program, a list of times to turn on/off the filter per day, and then the arduino will work in autonomous mode.
How can I perform such a communication with mysensors?

thanks in advance

In my home automation (with mysensors + home assistant) I am monitoring the 3 phases of the house with CT current sensors and the emonlib, which works nicely.
I wanted from time to time to send a full waveform with mysensors, but I could not find out how to send an array of readings instead of a single entry. Is it possible to do it with mysensors?

I want to experiment making an AI to identify from the waveform the device that is consuming the power.