Custom alert - No consumption

any chance of a custom alert.

id like to make one so if I haven’t had any consumption data posted for 30 minutes send an alert.

there is a low for generation,
high for consumption
low and high for extended data.
idle for the whole system.

but I cant use idle as my generation is only posted between 6am-6pm basically and that is also pushed via fronius rather than my script that does consumption and extended data that i want to know if its working…

Will have to see if its possible. An alert would go out when generation is registered but consumption is missing.