fixed by : Have nice day

Same bug :
pi@raspberrypi:/tmp $ sudo su -
root@raspberrypi:~# mount -o remount,rw /
root@raspberrypi:~# /etc/init.d/saveoverlays sync
[....] Syncing overlay filesystem sync: saveoverlays[info] Syncing /home to /home_org ....
[info] Syncing /var to /var_org ....
[info] Saving fake-hwclock.
[info ...

Hi,

just pushing a pull request for leaking detection.

-- Water leak detection
--
-- assumptions:
-- need 2 devices :
-- a Water Flow devices name "Water_Flow"
-- a Dummy Device type percentage "Leakage_Percent"
--
-- 1 / leakage "open valve"
-- Every minute if a non-zero water flow is present ...