Last seen notification Topic is solved

[gmccarthy]

Not sure if the following is currently possible - if not it would be a nice feature.

Notification when last sensor time is greater than xxx.

If one of my sensors stops reporting for more than x mins I'd like to know about it as it's probably died then and needs a reboot.

[Minglarn]

This is something i've been searching for!

+1 for this!

[Egregius]

Isn't that what's "Sensor Timeout" is for in the settings/other page?

[stlaha2007]

@gmccarthy:
Which need to reboot, your sensor/gateway or domotics?

Else domotics has a hardware time out which can be configured to restart/reboot that hardware/gateway.

Look at the settings of your hardware device. If you mean a specific sensor, it depends i would think. Then your suggestion would be a nice one to know which sensor needs to a (manual) reboot.

Sent from my D6503 using Tapatalk

[gmccarthy]

Its not to reboot anything - its more of a info notification that I need to investigate a sensor that has not reported in for a while.

Found this:
viewtopic.php?f=31&t=5498

There is already logic inside domoticz, but the function is not completed.

function CheckDeviceTimeout

I will put it on the todo list

[stlaha2007]

Youre right. Seen that topic long time ago. Never thought of being the prob yoi wanted to know.

Guess we have to wait for Gizmocus to finish its ToDo

Sent from my D6503 using Tapatalk

[hansrune]

Maybe I can help .... I created the following LUA script to monitor ESIC/WT450 and other unreliable sensors. This sends me notification when selected sensors drops out, and another one if it starts responding again. You can also exclude sensors from being monitored for timeouts.

The script makes use of Domoticz user variables for configuration as follows:

• SensorTimeOut (integer) is useful to change for debugging, or undefined for defaults
• SensorsAlerted (string) - blank / undefined for no alerts. NB: Set to "None" as initial value for alerts
• SensorMonitorDevices (string) - comma separated list of substrings to match for device names
• SensorMonitorExcluded (string) - comma separated list of substrings out of the matched devices to exclude

The substring matches are intentional, and the purpose is to make it easy to include / exclude device names containing functional names such as Temp and (R)egulator.

A minimal setup of user variables can be as follows, but only SensorsAlerted is strictly needed.

Typical Variables

SensMonTypical.png (32.61 KiB) Viewed 8200 times

A more typical user variable setup can look like this. In this case it displays a state where one sensor has timed out

Minimal variables

SensMonStart.png (47.98 KiB) Viewed 8200 times

Please note the needed inital word None. Just my laziness / makes the code simpler, but is required for this to work.

If you prefer, you can just use the fallback variables in the script instead of user variables. I find user variables handy as i use the same LUA script in two different houses.

The following script_time_sensormonitor.lua can also be downloaded from here

Code: Select all

--
-- $Id: script_time_sensormonitor.lua,v 1.2 2015/09/09 18:59:49 pi Exp $
--
logging = true
debug = false
--
-- User variables from Domoticz setup
--      SensorTimeOut (integer) is useful to change for debugging, or undefined for defaults
--      SensorsAlerted (string) - blank / undefined for no alerts, set to "None" as initial value for alterts
--      SensorMonitorDevices (string) - comma separated list of substrings to match for device names
--      SensorMonitorExcluded (string) - comma separated list of substrings out of the matched devices to exclude
--
monitordevices=uservariables["SensorMonitorDevices"]; 
excludeddevices=uservariables["SensorMonitorExcluded"]; 
sensorsalerted=uservariables["SensorsAlerted"];
devicetimeout=uservariables["SensorTimeOut"]; 
--
-- Fallback values
--
if not ( monitordevices ) then
        monitordevices = "Temp,CPU"
end
if not ( excludeddevices ) then
        excludeddevices = "egulator"
end
if not ( devicetimeout ) then
        devicetimeout = 600
end

--
-- No changes should be needed below here
--
function changedsince(device)
        t1 = os.time()
        ts = otherdevices_lastupdate[device]
        year = string.sub(ts, 1, 4)
        month = string.sub(ts, 6, 7)
        day = string.sub(ts, 9, 10)
        hour = string.sub(ts, 12, 13)
        minutes = string.sub(ts, 15, 16)
        seconds = string.sub(ts, 18, 19)
        t2 = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}
        difftime=(os.difftime(t1,t2))
        -- if (debug) then print("Device " .. device .. " not changed in " .. difftime .. " seconds") end
        return difftime
end

commandArray = {}
for device, value in pairs(otherdevices_svalues) 
do
        pos = nil
        exclpos = nil
        for matchname in string.gmatch(monitordevices, "[^,]+")
        do
                pos = string.find(device,matchname,1,true)
                if ( pos ) then 
                        for exname in string.gmatch(excludeddevices, "[^,]+")
                        do
                                exclpos = string.find(device,exname,1,true)
                                if ( exclpos ) then 
                                        if (debug) then print("Excluded device " ..  device .. "  matching " .. exname) end
                                        break 
                                end
                        end
                        if ( exclpos ) then break end
                        if (debug) then print("Included device " ..  device .. " matching " .. matchname .. " value=" .. value) end
                        deltatime =  changedsince(device)
                        if ( deltatime > devicetimeout ) then
                                if (logging) then print("Timeout for " .. device .. ". Not seen for " .. deltatime .. " seconds" ) end
                                if ( sensorsalerted ) then
                                        pos = string.find(sensorsalerted,"," .. device,1,true)
                                        if not ( pos ) then
                                                sensorsalerted = sensorsalerted .. "," .. device
                                                if (logging) then print("sensorsalterted addition: " .. device .. " added to " .. sensorsalerted) end
                                                commandArray['Variable:SensorsAlerted']=sensorsalerted
                                                commandArray['SendNotification']="Sensor " .. device .. " inactive"
                                        end
                                end
                        else
                                if ( sensorsalerted ) then
                                        pos = string.find(sensorsalerted,"," .. device,1,true)
                                        if ( pos ) then
                                                len = string.len(device) + 1
                                                sensorsalerted = string.sub(sensorsalerted, 1, pos - 1) .. string.sub(sensorsalerted, pos + len)
                                                if (logging) then print("sensorsalterted removal: " .. device .. " removed from " .. sensorsalerted) end
                                                commandArray['Variable:SensorsAlerted']=sensorsalerted
                                                commandArray['SendNotification']="Sensor " .. device .. " active again"
                                        end
                                end
                        end
                else
                        if (debug) then print("No match device " ..  device .. " no match for " .. matchname) end
                end
        end
end
return commandArray

[smdoyle]

Hi hansrune, that is really helpful and very well described. Thanks to the clear instructions and URL I was able to get it working in a matter of minutes. Looks a well designed piece of code too!
Many thanks!

[hansrune]

Good to hear that. Maybe i should make it wiki material...

[Flopp]

Nice work

[Flopp]

Since Domoticz doesn't accept empty Value for Strings you have to write None as Value

[Flopp]

Is there a way to make a short delay, I had 3 sensors that was too old but I only got one email.
Can the RPi be too quick or maybe the mail server took time to send the first mail so the other two emails never reached the mail server?
My SensorAlerted includes all 3 sensor that is old.

[dannybloe]

Not sure if the following is currently possible - if not it would be a nice feature.

Notification when last sensor time is greater than xxx.

If one of my sensors stops reporting for more than x mins I'd like to know about it as it's probably died then and needs a reboot.

Have you looked at dzVents? It allows you to do this in just a couple of lines of code.

[Flopp]

That looks interesting and you can do a lot more with dzvents

[EDsteve]

Just in case someone is coming across this thread like me.

The solution is already there:

- click on the "Notification" button from the sensor you want to monitor
- change the "type" in the pull down menu to "last Update"
- and configure the rest of the settings

[HM31]

Just in case the same someone wanted to use the above trick. Type "Last Update" is unfortunately not available for all type of devices.

[waltervl]

Just in case the same someone wanted to use the above trick. Type "Last Update" is unfortunately not available for all type of devices.

On what device type did you miss it?

[kniazio]

Not sure if the following is currently possible - if not it would be a nice feature.

Notification when last sensor time is greater than xxx.

If one of my sensors stops reporting for more than x mins I'd like to know about it as it's probably died then and needs a reboot.

Have you looked at dzVents? It allows you to do this in just a couple of lines of code.

I have such an error:

Code: Select all

2022-04-13 06:45:00.117 Error: EventSystem: in /home/pi/domoticz/dzVents/runtime/dzVents.lua: /home/pi/domoticz/dzVents/runtime/EventHelpers.lua:464: bad argument #1 to 'pairs' (table expected, got string)

Here is my script:

Code: Select all

local devicesToCheck = {
	{ ['name'] = 'Wewnętrzna', ['threshold'] = 30 }
}

return {
	active = true,
	on = {
		['timer'] = 'every 5 minutes'
	},
	execute = function(domoticz)

		local message=""

		for i, deviceToCheck in pairs(devicesToCheck) do
			local name = deviceToCheck['name']
			local threshold = deviceToCheck['threshold']
			local minutes = domoticz.devices[name].lastUpdate.minutesAgo

			if ( minutes > threshold) then
				message = message .. 'Device ' ..
						name .. ' seems to be dead. No heartbeat for at least ' ..
						minutes .. ' minutes.\r'
			end
		end

		if (message) then
			domoticz.email('Dead devices', message, '[email protected]')
			domoticz.log('Dead devices found: ' .. message, domoticz.LOG_ERROR)
		end
	end
}

[HM31]

Just in case the same someone wanted to use the above trick. Type "Last Update" is unfortunately not available for all type of devices.

On what device type did you miss it?

Dummy devices, on/off switches, open/close sensor, motion sensor, etc ...

[waltervl]

Yes I see now, on all switches this last update notification is not possible. Available though on most other sensors (not switches) like temperature, UV, Weather, thermostats, pressure, custom sensor, Lux etc.