Things look correctly configured to me. How you have wired your ato? Can you share an image of the build, let’s cross check that.
On the pi, you can see the gpio state as
Code:cat /sys/class/gpio/gpio12/value
This value should be different (1 or 0) , based on whether the probe is inside water or outside, can you verify this?
The ATO controls my outlet number 1, i can manually enable it, i ear the relay click.
so all i need now is the float to send the message