How to run a scheduled event at Solar Noon?

[sgraystar]

With solar panels installed there is an advantage to schedule events when solar generation is likely at a maximimum.

There are advanced approaches using solar forecasts, but a simple approach is to use a scheduler event to run at SolarNoon +/- offset, similar to current run at Sunrise +/- offset.

I realise this can be done wholly by scripting but would prefer to retain the ability to use the scheduler gui.

If an event is configured to run at Sunrise +/- offset via the GUI, is it possible to script an replacement of the start time with some other value such as a simplified solarNoon = (sunrise + sunset)/2?

Any ideas?

This is a little clumsy, but using event name is one way of adding solarNoon by the existing gui.
What would be the equivalent of ' io.writefile('/tmp/lm-scheduler-clear', '')' for the clipsal/schneider firmware?

Code:

local name = 'solarNoon%' local maxOffsetHours = 6    -- avoid 24hr boundaries for _, evt in ipairs(db:getall('SELECT * FROM scheduler_events WHERE name LIKE ?', name)) do   if evt then      local _, _, plusMinus, offsetHour, offsetMin = string.find(evt.name, "^solarNoon%s*([+-])%s*(0[0-"..maxOffsetHours.."])([0-5]%d)%D*")     if plusMinus and offsetHour and offsetMin and evt.type == '' then       local sunrise, sunset = rscalc(latitudeMel, longitudeMel)       local solarNoon = math.floor(((sunset + sunrise) / 2) + 0.5)       local offsetMinutes = (offsetHour * 60) + offsetMin       local eventMinutes       if plusMinus == '+' then         eventMinutes = solarNoon + offsetMinutes       else         eventMinutes = solarNoon - offsetMinutes       end       local eventStartHour = math.floor(eventMinutes / 60)       local eventStartMin = math.floor(eventMinutes % 60)             db:update('scheduler_events', {         start_hour = eventStartHour,         start_min = eventStartMin       }, { id = evt.id })             -- io.writefile('/tmp/lm-scheduler-clear', '')     else       log("Error. '"..evt.name.."' event name must begin with 'solarNoon[+-]HHMM ...' where max HH = 0"..maxOffsetHours..", and event setting 'Run at:' = 'Specific time'")     end   end end

[sgraystar]

revised script

Code:

--[[ Warning: database functions are subject to change with firmware updates. ]]-- -- Update the start time for any solarNoon scheduler events. local namePrefix = 'solarNoon%' local maxOffsetHours = 8    -- avoid 24hr boundaries local namePattern = "^solarNoon%s*([+-])%s*(0[0-"..maxOffsetHours.."])([0-5]%d)%D*" local typeSpecificTime = '' for _, evt in ipairs(db:getall('SELECT * FROM scheduler_events WHERE name LIKE ?', namePrefix)) do   if evt then     if (type(evt.start_hour) == "number") and (evt.start_hour % 1 == 0) and (type(evt.start_min) == "number") and (evt.start_min % 1 == 0) and (type(evt.type) == 'string') then           local _, _, plusMinus, offsetHour, offsetMin = string.find(evt.name, namePattern)       if plusMinus and offsetHour and offsetMin and (evt.type == typeSpecificTime) then         local sunrise, sunset = rscalc(latitudeMel, longitudeMel)         local solarNoon = math.floor(((sunset + sunrise) / 2) + 0.5) -- approximation         local offsetMinutes = (offsetHour * 60) + offsetMin         local eventMinutes         if plusMinus == '+' then           eventMinutes = solarNoon + offsetMinutes         else           eventMinutes = solarNoon - offsetMinutes         end         local eventStartHour = math.floor(eventMinutes / 60)         local eventStartMin = math.floor(eventMinutes % 60)         if (evt.start_hour ~= eventStartHour) or (evt.start_min ~= eventStartMin) then           db:update('scheduler_events', {             start_hour = eventStartHour,             start_min = eventStartMin           }, { id = evt.id })           io.writefile('/tmp/lm-scheduler-clear', '')         end       else         log("Error. '"..evt.name.."' event name must begin with 'solarNoon[+-]HHMM' where max HH = 0"..maxOffsetHours..", and event setting 'Run at:' must be 'Specific time'")       end           else       log("Error. Firmware change, check evt.start_hour and evt.start_min are integers, and evt.type is a string.", evt)     end   end end