Freezer door alarm

[no66]

Fairly new to Domoticz. Just come from Telldus Net. Liking Domoticz!

Anyway, I'm trying to achieve the following:
If the freezer door is open for over 1 minute (60sec), do an action, say doorbell.
If door is closed before 1 minute, do nothing.
I can do a simple blocky, but this triggers after one minute regardless, even if the door is closed before the minute is up

Some pointers would be much appreciated.

[Egregius]

You need a script that both checks the status of the switch and the last timestamp.
In my php cron script it would be as easy as:

Code: Select all

if($Sfreezer == 'Open' && $STfreezer < $time - 60) Switch($SIdoorbell, 'On');

[b_weijenberg]

Or use this sensor https://www.m.nu/temperatursensor-kylfr ... -1391.html
You can raise an alarm if the temperature becomes above x degrees.

New freezers with a deicing function and blow at regular intervals for a short period hot air in the freezer. Wrap some plastic foam around the sensor to avoid false warnings.

[no66]

Egregius, Not there yet with scripting, but see the idea with timestamps.

b_weijenberg, have tried this. Works ok and might go back to this solution. however, would like to try with a magnet switch.
I suppose this wont work? (Not at home to test atm)

Freezer door open.JPG (28.44 KiB) Viewed 2497 times

[ThinkPad]

Egregius, Not there yet with scripting, but see the idea with timestamps.

b_weijenberg, have tried this. Works ok and might go back to this solution. however, would like to try with a magnet switch.
I suppose this wont work? (Not at home to test atm)

Freezer door open.JPG

That won't work, the 'AFTER 60 seconds' cannot be reset. If it is triggered, it will always be triggered.

However, this Lua script: http://domoticz.com/wiki/Event_script_e ... 10_minutes is exactly what you are looking for
The 'Open' may need changing in to 'On' or so, depends on the sensor you are using. Just look in the switch log of Domoticz what kind of signal the sensor produces when it is opened/closed.

[DutchHans]

Hi Ive made a check of the freezer which sends me a notification to my phone when its above -10 degrees, works like a charm. Ive put a simple Cresta sensor in the freezer.
Freezertimer is a dummy switch which shuts off after 10 minutes

Happy to share

Cheers. Hans

Code: Select all

--script_device_sensorFreez.lua
local sensorFreezer = 'Freezer Temp' --name of the sensor that gets created when you add the Cresta device (and that contains multiple values like temperature, humidity, barometer etc)

commandArray = {}
 
if devicechanged[sensorFreezer] then
   sFreezerTemp, sFreezerHumidity, sFreezerPressure = otherdevices_svalues[sensorFreezer]:match("([^;]+);([^;]+);([^;]+)")
   sFreezerTemp = tonumber(sFreezerTemp)
   --commandArray['UpdateDevice'] = idx .. '|0|' .. tostring(sFreezerTemp)

print('Freezer Temperature is ' .. sFreezerTemp)

FreezerAlarmText = "Freezer temperature is above -10 degrees, please check the device."
FreezerAlarmURLtext = string.gsub( FreezerAlarmText, " ", "%%20")


 if(tonumber(sFreezerTemp) >  -10.0 )  and (otherdevices['FreezerTimer'] == 'Off')   then 
  
  commandArray['OpenURL']='https://autoremotejoaomgcd.appspot.com/sendnotification?key=XXXXXXXXX--OhaJQBEbHld-eG1DjwC-Srt9miElajPslmlvYTno7MlRfy12WkDPgeM0KpPycN2XNjBMv0PT3MIWcBWrAlmOsQUK3Og5H_ptGCl7v26zlDdIkSsNnc33HQeYb_D1GOrpoaNFj9xP-bR0XHD7Cn-5XcJtUIh8sw&title=Message%20of%20the%20house&text='..FreezerAlarmURLtext..'&url=XXXXXXXXXXX.myfritz.net:8080'
  commandArray['FreezerTimer']='On'
	
print('-- ' .. FreezerAlarmText )
  end

end 

return commandArray

[no66]

Thanks guys. Will have a good look at this.