Domoticz

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--[[
    This script does manage the power usage of Electrical heating / water heating to
    prevent overloading the electrical system. It does this by preventing both systems to be active at the same time
    with a minimum gap of 1 minute.
    For this it uses two virtual switches that will trigger this script. The logic in the script will decide if and when the 
    real switches are to be activated.
    
    rWH: real waterHeater switch
    rEH: real electricHeater switch
    vWH: virtual waterHeater switch used in scheduler; controls rWH.
    vEH: virtual electricHeater switch; controls rEH

    script will be triggered on vWH, vEH

    logic:
    if vEH -> On then vWH + rWH -> Off and rEH -> On after 1 minute
    if vWH -> On then if vEH = On or rEH = On then vWH -> Off
    if vEH -> Off then rEH -> Off and if in time window then vWH -> On after 1 minute 
    if vWH -> Off then rWH -> Off

    History
    ========
    20191114 Start coding
]]

-- ********* Your settings below this line 
        
        local virtualElectricalHeating = 'vEH'  -- change to name of your virtual switch for Electrical heating
        local realElectricalHeating = 'rEH'  -- change to name of your real switch for Electrical heating
        local virtualWaterHeating = 'vWH'  -- change to name of your virtual switch for Water heating
        local realWaterHeating = 'rWH'  -- change to name of your real switch for Waterheating
        
        local waterHeatingschedule = 'at 22:00-05:00' 
        local spikeProtectionTime = 60
        
-- ********** No  changes required below this line
        
return
{
    on = {devices = { virtualElectricalHeating, virtualWaterHeating }},
       
    logging = { level = domoticz.LOG_DEBUG,}, -- Select one of LOG_INFO, LOG_DEBUG, LOG_ERROR, LOG_FORCE to override system log level

    execute = function(dz, item)
        _G.logMarker =  _G.moduleLabel
       
        local virtualElectricalHeating = dz.devices(virtualElectricalHeating)
        local realElectricalHeating = dz.devices(realElectricalHeating)
        local virtualWaterHeating = dz.devices(virtualWaterHeating)
        local realWaterHeating = dz.devices(realWaterHeating)
              
        -- if vEH -> On then vWH + rWH -> Off and rEH -> On after xx seconds
        if item == virtualElectricalHeating and item.active then
            virtualWaterHeating.switchOff().silent()
            realWaterHeating.switchOff()
            realElectricalHeating.switchOn().afterSec(spikeProtectionTime)
        
        -- if vEH -> Off then rEH -> Off and if in time window then vWH -> On 
        elseif item == virtualElectricalHeating then 
            realElectricalHeating.switchOff() 
            if dz.time.matchesRule(waterHeatingschedule) then
                virtualWaterHeating.switchOn()
            end
            
        -- if vWH -> On then if virtualElectricalHeating = On or rEH = On then vWH -> Off else rWH -> On after xx seconds
        elseif item == virtualWaterHeating and item.active then
            if virtualElectricalHeating.active or realElectricalHeating.active then
                virtualWaterHeating.switchOff().silent()
            else
                realWaterHeating.switchOn().afterSec(spikeProtectionTime)
            end
        
        -- if vWH -> Off then rWH -> Off
        elseif item == virtualWaterHeating then -- vWH switched Off
            realWaterHeating.switchOff()
        end
    end
}

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http://192.168.192.109:8084/json.htm?idx=138&type=timers

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{
"result": [
{
"Active": "true",
"Cmd": 0,
"Color": "",
"Date": "",
"Days": 128,
"Level": 100,
"MDay": 0,
"Month": 0,
"Occurence": 0,
"Randomness": "false",
"Time": "09:12",
"Type": 2,
"idx": "1"
},
{
"Active": "true",
"Cmd": 1,
"Color": "",
"Date": "",
"Days": 128,
"Level": 100,
"MDay": 0,
"Month": 0,
"Occurence": 0,
"Randomness": "false",
"Time": "09:15",
"Type": 2,
"idx": "2"
}
],
"status": "OK",
"title": "Timers"
}