Notification when sensor is not working

[DasK]

I guess this is common issue, but I swear I searched and I couldn't find anything.
I just want to get a notification when a sensor stop working (low battery, out of range, broken....)
I suppose I could use lastupdate variable, witch I believe only works in LUA and not in blockly, but there has to be an easy way to address this, since domoticz knows the sensor is not working because it turns the label red.

So my question is: Is there some variable that can be checked (better in blockly) to say: If this sensor is marked in red (not working) then send a notification?

[jake]

Yes, I have the same, but then sometimes with a switch. I would like to automatic 'heal' the switch connection when connection is lost. At least be informed by NMA

Verstuurd vanaf mijn Transformer TF101 met Tapatalk

[sincze]

I can share my code how I deal with this in lua if you want?? Sometimes my OTGW needs to be 'switched' off and back on.

Sent from my SM-G925F using Tapatalk

[jake]

I can share my code how I deal with this in lua if you want?? Sometimes my OTGW needs to be 'switched' off and back on.

Sent from my SM-G925F using Tapatalk

yes, please

[sincze]

I use the following code if a device is not responding anymore)
Code can be easily modified if you router is not responding to internet for example.

Code: Select all

---------------------------------------------------------------------------------------------------------
-- Script parameters
----------------------------------------------------------------------------------------------------------
Debug = "YES"                    -- Turn debugging on ("YES") or off ("NO")

----------------------------------------------------------------------------------------------------------
-- Script functions
----------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------
-- Command Array functions
----------------------------------------------------------------------------------------------------------

function datetimedifferencenow(s)
   year = string.sub(s, 1, 4)
   month = string.sub(s, 6, 7)
   day = string.sub(s, 9, 10)
   hour = string.sub(s, 12, 13)
   minutes = string.sub(s, 15, 16)
   seconds = string.sub(s, 18, 19)
   t1 = os.time()
   t2 = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}
   difference = os.difftime (t1, t2)
   return difference
end


----------------------------------------------------------------------------------------------------------
-- Command Tools & Examples
----------------------------------------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------
-- Declare & Fill variables
----------------------------------------------------------------------------------------------------------

commandArray = {}

-- First check several devices if they responded within 300 seconds (5 mminutes) & check that the 433 mhz switch is ON.
-- I don't switch based upon 1 OTGW device I use several to make sure it is not working.
if (datetimedifferencenow(otherdevices_lastupdate['Max.  Vloerverwarming']) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['OTGW - Outside Temperature'])) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['Socket OTGW'])) > 300 and
   (otherdevices['Socket OTGW'] == 'On')
    ) then
-- Switch OFF the socket and send some LOG information + PUSHOVER notification
        commandArray['Socket OTGW'] = 'Off'
        print("OTGW: OTGW Reageert niet Let OP!")
        commandArray['SendNotification']='ALERT OTGW#OTGW Reageert niet, Switching Off Socket#0'
        print("OTGW: Switching off Socket!")
      else

-- Now check if lastupdate of socket has been updated within 5 minuts and if it is switched off
        if (datetimedifferencenow(otherdevices_lastupdate['Socket OTGW']) > 300 and
        (otherdevices['Socket OTGW'] == 'Off')
        )
        then
-- Switch ON the socket and send some LOG information + PUSHOVER notification
           commandArray['Socket OTGW'] = 'On'
           print("OTGW Socket probably off!")
           commandArray['SendNotification']='ALERT OTGW#OTGW Reageert niet, Switching On Socket#0'
           print("OTGW: Switching on Socket!")
        end
end                

return commandArray

[Jordi]

sincze, that's looks great. I'll try it.

I want it to detect if someone is using a frequency inhibitor (jamming) to avoid communication between domoticz with the door sensors, PIRs, etc.

if more than one fails could be for that reason.

Thanks

[jmleglise]

Hi,

I am interessted in jamming detector too ! I hope you could share your progress here and solve this :
- I have no jamming detector to check if my counter-measure will work !
- a jammer have little range. So some device will work, and some not.
- differentiate between dead battery and jamming.


To help you, this is a code (for another purpose) that can inspire you.

Code: Select all

-- Checks if some sensors have been received recently, and
-- otherwise sends an e-mail to tell us to go check the lost one.

destEmail = '[email protected]' -- Where messages should be sent.
bodyMail=""

now = os.time()

local tableDeviceToCheck = {    -- timeout for each  device, in seconde.
MailBox=259200, -- 3 days  3*24*60*60, 
["Motion Liv"]=86400, -- 1 days   1*24*60*60, 
["Alert W"]=28800, -- 8 hours  8*60*60, 
Lux=3600, 
Temp1=50, 
CPU=3600, 
["WU Barometre"]=28800, 

}

for deviceName, deviceTimeOut in pairs(tableDeviceToCheck) do
	print(deviceName .." delay"..deviceTimeOut)
	s = otherdevices_lastupdate[deviceName]
	year = string.sub(s, 1, 4)
	month = string.sub(s, 6, 7)
	day = string.sub(s, 9, 10)
	hour = string.sub(s, 12, 13)
	minutes = string.sub(s, 15, 16)
	seconds = string.sub(s, 18, 19)
	lastAlive = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}

    -- If not seen since timeout, send an email
	if (lastAlive + deviceTimeOut) < now then
		bodyMail=bodyMail..deviceName.. " has not been seen since " .. s .. ".<br>\n"
	end
end

if bodyMail~="" then
	subject = 'Domoticz check : Device has been lost !'
	commandArray['SendEmail'] = subject .. '#' .. bodyMail .. '#' .. destEmail
end

return commandArray

[renerene]

To help you, this is a code (for another purpose) that can inspire you.

Thank you jmleglise. I have modified the code a bit, the result is below.
The trigger is 'time based', so it runs every minute. To prevent a mail bomb it only checks once a day, at 17:00 hrs.

It would be better if the table was expended with a third index ('Sensorstate OK / NOK) and that the table was stored in a user variable. That would give the possibility to direct (and only) send messages when the sensor changes it's status (connection lost / connection restored).
I don't know how to store and read the table values (yet), so To Be Continued

Code: Select all

-- Checks if some sensors have been received recently, and
-- otherwise sends a notification to tell us to go check the lost one.
-- https://www.domoticz.com/forum/viewtopic.php?f=15&t=9711&p=112074#p112074

index=1
now = os.time()

local tableDeviceToCheck = {    -- timeout for each  device, in seconde.
  ["badkamer thermo hygro sensor"]=3600, -- 1 uur
  ["Weerstation"]=14400, -- 4 uur
}

commandArray={}

date = os.date("*t")
if date.hour==17 and date.min==0 then

    for deviceName, deviceTimeOut in pairs(tableDeviceToCheck) do
   
        s = otherdevices_lastupdate[deviceName]
        year = string.sub(s, 1, 4)
        month = string.sub(s, 6, 7)
        day = string.sub(s, 9, 10)
        hour = string.sub(s, 12, 13)
        minutes = string.sub(s, 15, 16)
        seconds = string.sub(s, 18, 19)
        lastAlive = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}
        
        tijd = now - lastAlive
        print(deviceName .." "..tijd.. ' seconden geen reactie, grenswaarde ='..deviceTimeOut)
   
        -- If not seen since timeout, send an email
        if (lastAlive + deviceTimeOut) < now then
            commandArray[index]={['SendNotification']='Melding#Device '..deviceName..' is niet gezien sinds '..s..' seconden. Batterij leeg?#0'}
            index = index + 1
        end
  end
end
return commandArray

[Mikey]

I use the following code if a device is not responding anymore)
Code can be easily modified if you router is not responding to internet for example.

Code: Select all

---------------------------------------------------------------------------------------------------------
-- Script parameters
----------------------------------------------------------------------------------------------------------
Debug = "YES"                    -- Turn debugging on ("YES") or off ("NO")

----------------------------------------------------------------------------------------------------------
-- Script functions
----------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------
-- Command Array functions
----------------------------------------------------------------------------------------------------------

function datetimedifferencenow(s)
   year = string.sub(s, 1, 4)
   month = string.sub(s, 6, 7)
   day = string.sub(s, 9, 10)
   hour = string.sub(s, 12, 13)
   minutes = string.sub(s, 15, 16)
   seconds = string.sub(s, 18, 19)
   t1 = os.time()
   t2 = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}
   difference = os.difftime (t1, t2)
   return difference
end


----------------------------------------------------------------------------------------------------------
-- Command Tools & Examples
----------------------------------------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------
-- Declare & Fill variables
----------------------------------------------------------------------------------------------------------

commandArray = {}

-- First check several devices if they responded within 300 seconds (5 mminutes) & check that the 433 mhz switch is ON.
-- I don't switch based upon 1 OTGW device I use several to make sure it is not working.
if (datetimedifferencenow(otherdevices_lastupdate['Max.  Vloerverwarming']) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['OTGW - Outside Temperature'])) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['Socket OTGW'])) > 300 and
   (otherdevices['Socket OTGW'] == 'On')
    ) then
-- Switch OFF the socket and send some LOG information + PUSHOVER notification
        commandArray['Socket OTGW'] = 'Off'
        print("OTGW: OTGW Reageert niet Let OP!")
        commandArray['SendNotification']='ALERT OTGW#OTGW Reageert niet, Switching Off Socket#0'
        print("OTGW: Switching off Socket!")
      else

-- Now check if lastupdate of socket has been updated within 5 minuts and if it is switched off
        if (datetimedifferencenow(otherdevices_lastupdate['Socket OTGW']) > 300 and
        (otherdevices['Socket OTGW'] == 'Off')
        )
        then
-- Switch ON the socket and send some LOG information + PUSHOVER notification
           commandArray['Socket OTGW'] = 'On'
           print("OTGW Socket probably off!")
           commandArray['SendNotification']='ALERT OTGW#OTGW Reageert niet, Switching On Socket#0'
           print("OTGW: Switching on Socket!")
        end
end                

return commandArray

I'm pretty new in domoticz, but this code looks great. But there is one thing I don't understand. Is the 'Socket OTGW' something like a Z-Wave USB Stick? Because I have such a Z-Wave stick, but I don't see this stick in the device list. How can you see this stick in the device list? I only see it in the Hardware list. thanks in advance

[Nautilus]

I'm pretty new in domoticz, but this code looks great. But there is one thing I don't understand. Is the 'Socket OTGW' something like a Z-Wave USB Stick? Because I have such a Z-Wave stick, but I don't see this stick in the device list. How can you see this stick in the device list? I only see it in the Hardware list. thanks in advance

Pretty sure it refers to Opentherm gateway (http://otgw.tclcode.com/). Your usb Z-wave stick is a hardware component that allows compatible devices to be added to Domoticz. It is not seen as a device itself (like no other hardware components either). I don't think there is any good way of checking if there are some errors with the stick itself (I don't know how it would report those, could be that Domoticz log would pick up something so some sort of monitoring for log messages could work) but mainly I'd say you need to focus on checking the sensors and switches are seen during the expected intervals as done with the scripts in this thread. There is also the "Data timeout" setting for hardware which will enable the restart of the particular hardware if not data is received withing the configured interval. But I'm not sure if it works with z-wave sticks (not using it myself). Finally, maybe some additional inspiration from here: viewtopic.php?t=6274

For general Domoticz monitoring I've found Monit to be reliable and working well: https://www.domoticz.com/wiki/Monitoring_domoticz

[Mikey]

Thanks Nautilus. I will check these links. There's only one more question. You wrote in your script: "433 mhz switch". What does that exactly mean?

Sorry for bothering you.

[Nautilus]

Thanks Nautilus. I will check these links. There's only one more question. You wrote in your script: "433 mhz switch". What does that exactly mean?

Sorry for bothering you.

I guess this would be best left to answer by sinze as it is his script, but if you look at these lines:

Code: Select all

if (datetimedifferencenow(otherdevices_lastupdate['Max.  Vloerverwarming']) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['OTGW - Outside Temperature'])) > 300 and
   (datetimedifferencenow(otherdevices_lastupdate['Socket OTGW'])) > 300 and
   (otherdevices['Socket OTGW'] == 'On')

It looks like the first two (at least the "outside temperature") are sensors related to opentherm gateway and the third is maybe the opentherm unit itself that can be switched off completely. Therefore must check also that it is "On", otherwise it is expected there are no updates from the related sensors

[Mikey]

That's OK, thanks a lot for your help