How to send notifications with a delay [Solved]

[gschmidt]

I have another question, maybe you have an answer.
I also use node-red-contrib-cast nodes to send audio notifications for the "Frietpan" Switch to my google home speakers.
Now this is working when I turn the "Frietpan" switch ON or OFF, but the 2 delay notifications I have a problem with:

the Switch ON/OFF message is published through the MQTT node: domoticz/out into the node-red flow, but is it also possible to publish a "domoticz" log message to the MQTT node? Then I could use the domoticz "frietpan" delay messages to send the audio messages parallel

using os.execute dzVents can send any MQTT message to any topic. Only thing needed is installed mosquitto on the domoticz system.

Just let me know what you want to send to which topic and when and I will have a look.

The node-red flow at the moment is:

Knipsel.JPG (75.1 KiB) Viewed 1329 times

The white comment nodes I have added to show which domoticz notification message should be used.
The ''Frietpan" ON and OFF messages are already spoken by the Google Home speakers of course, so there is no need for an extra audio message
Only the 2 delayed messages I want to use as an audio message

In the current flow the Function node "Frietpan Klaar" is based on the state of the domoticz Frietpan Switch "idx=283":

Code: Select all

var msgFrietpanKlaar = {
    "url": "http://192.168.1.51:1880/frietpan-klaar",
    "contentType": "audio/mp3",
    "volume": 60
}

var msgVolumeBack = {
    "volume": 30
}

if (msg.payload.idx == '283') {
    if (msg.payload.nvalue == '1') {
      
      node.send(msgFrietpanKlaar);
      
      setTimeout(function(){
        node.send(msgVolumeBack);
      }, 7000);
      
     }
}

But I want to use the "KlaarDelay" Message instead or in combination with the Switch msg.payload.nvalue status:

Code: Select all

if (msg.payload.klaarDelay == 'Frietpan is klaar om te frituren') --this is the 15minutes later message  

The same for the OffDelay message (this is the 60 - 15 minutes later message)

Note: Node-Red and MQTT/Domoticz are running on different Raspberry Pi's

I hope the question is clear to you

[waaren]

I hope the question is clear to you

Sorry but no.
I don't use nodered and I have no immediate intention to start with it. Until now I always managed to do the things I need without it.

So the only thing I need to know from you is
What MQTT message do you want to send from the script to which topic and when.

And if applicable: You can also send information to the script with a customEvent embedded in an MQTT message. Send an MQTT
{"command":"customevent", "event":"MyEvent","data":"myData"} and scripts with customEvents = "MyEvent" will trigger.

[gschmidt]

I hope the question is clear to you

Sorry but no.
I don't use nodered and I have no immediate intention to start with it. Until now I always managed to do the things I need without it.

So the only thing I need to know from you is
What MQTT message do you want to send from the script to which topic and when.

And if applicable: You can also send information to the script with a customEvent embedded in an MQTT message. Send an MQTT
{"command":"customevent", "event":"MyEvent","data":"myData"} and scripts with customEvents = "MyEvent" will trigger.

Ok fair enough. I want the frietpan messages that your DzVents script sends to Telegram, also send to Mqtt and with the same delay time. Send it to mqtt topic: domoticz/out.

[waaren]

I want the frietpan messages that your DzVents script sends to Telegram, also send to Mqtt and with the same delay time. Send it to mqtt topic: domoticz/out.

This script will do that.

Code: Select all

-- Frietpan dzVents script

local myDevicename = 'Test'
local myEvent = 'Friet'

return
{
    on =
    {
        devices =
        {
            myDevicename,           
        },
        customEvents =
        {
            myEvent,
        },
    },
   
    logging =
    {
        level = domoticz.LOG_DEBUG,  -- change to LOG_ERROR when ok
        marker = 'Test Schakelaar',
    },

    execute = function(dz, item)
       
        local myDevice = dz.devices(myDevicename)
       
        local msgAan = 'De frietpan is aangezet!'
        local msgKlaar = 'De frietpan is klaar om te frituren!'
        local msgWordt = 'De frietpan staat nog aan en wordt nu uitgezet!'
        local msgUit = 'De frietpan is uitgezet!'
       
        local klaarDelay = 15
        local OffDelay = 60 - klaarDelay
       
       
        local function osCommand(cmd, foreGround)
            local foreGround = foreGround and '' or ' &'
            local cmd = cmd .. foreGround
           
            dz.log('Executing Command: ' .. cmd,dz.LOG_DEBUG)
           
            local fileHandle = assert(io.popen(cmd .. ' 2>&1 || echo ::ERROR::', 'r'))
            local commandOutput = assert(fileHandle:read('*a'))
            local returnTable = {fileHandle:close()}

            if commandOutput:find '::ERROR::' then     -- something went wrong
                dz.log('Error ==>> ' .. tostring(commandOutput:match('^(.*)%s+::ERROR::') or ' ... but no error message ' ) ,dz.LOG_DEBUG)
            else -- all is fine!!
                dz.log('ReturnCode: ' .. returnTable[3] .. '\ncommandOutput:\n' .. commandOutput, dz.LOG_DEBUG)
            end

            return commandOutput,returnTable[3] -- rc[3] contains returnCode
        end
       
       
        local function sendMQTT(message, topic)
            local MQTTTopic = topic or 'domoticz/out'
            local json = {} json.msg = message
            json = dz.utils.toJSON(json)
        
            osCommand ( 'mosquitto_pub' ..  ' -t '  .. MQTTTopic .. " -m '" .. json .. "'")
        end
       
        local function sendMessage(message, emitMinutes)
           
            local subject = (dz.moduleLabel or 'frietpan'):gsub('#','')
            dz.notify(subject, message, dz.PRIORITY_MEDIUM, dz.SOUND_PERSISTENT, nil, dz.NSS_TELEGRAM)

            sendMQTT(message)
           
            dz.log(message,dz.LOG_DEBUG)
            if emitMinutes ~= nil then dz.emitEvent(myEvent, emitMinutes).afterMin(emitMinutes) end
            -- if emitMinutes ~= nil then dz.emitEvent(myEvent, emitMinutes).afterSec(emitMinutes) end -- for test only
        end
       
        if item.isDevice and item.state == 'On' then
            sendMessage(msgAan, klaarDelay)
                       
        elseif item.isCustomEvent and myDevice.state == 'On' and tonumber(item.data) == klaarDelay then
            sendMessage(msgKlaar, OffDelay)
           
        elseif item.isCustomEvent and myDevice.state == 'On' and tonumber(item.data) == OffDelay then
            myDevice.switchOff().silent()
            sendMessage(msgWordt)
           
        elseif item.isDevice and item.state == 'Off' then
            sendMessage(msgUit)
           
        end
    end
}

[gschmidt]

I want the frietpan messages that your DzVents script sends to Telegram, also send to Mqtt and with the same delay time. Send it to mqtt topic: domoticz/out.

This script will do that.

Code: Select all

-- Frietpan dzVents script

local myDevicename = 'Test'
local myEvent = 'Friet'

return
{
    on =
    {
        devices =
        {
            myDevicename,           
        },
        customEvents =
        {
            myEvent,
        },
    },
   
    logging =
    {
        level = domoticz.LOG_DEBUG,  -- change to LOG_ERROR when ok
        marker = 'Test Schakelaar',
    },

    execute = function(dz, item)
       
        local myDevice = dz.devices(myDevicename)
       
        local msgAan = 'De frietpan is aangezet!'
        local msgKlaar = 'De frietpan is klaar om te frituren!'
        local msgWordt = 'De frietpan staat nog aan en wordt nu uitgezet!'
        local msgUit = 'De frietpan is uitgezet!'
       
        local klaarDelay = 15
        local OffDelay = 60 - klaarDelay
       
       
        local function osCommand(cmd, foreGround)
            local foreGround = foreGround and '' or ' &'
            local cmd = cmd .. foreGround
           
            dz.log('Executing Command: ' .. cmd,dz.LOG_DEBUG)
           
            local fileHandle = assert(io.popen(cmd .. ' 2>&1 || echo ::ERROR::', 'r'))
            local commandOutput = assert(fileHandle:read('*a'))
            local returnTable = {fileHandle:close()}

            if commandOutput:find '::ERROR::' then     -- something went wrong
                dz.log('Error ==>> ' .. tostring(commandOutput:match('^(.*)%s+::ERROR::') or ' ... but no error message ' ) ,dz.LOG_DEBUG)
            else -- all is fine!!
                dz.log('ReturnCode: ' .. returnTable[3] .. '\ncommandOutput:\n' .. commandOutput, dz.LOG_DEBUG)
            end

            return commandOutput,returnTable[3] -- rc[3] contains returnCode
        end
       
       
        local function sendMQTT(message, topic)
            local MQTTTopic = topic or 'domoticz/out'
            osCommand( 'mosquitto_pub' ..  ' -t '  .. MQTTTopic .. " -m '" .. message .. "'")
        end
       
        local function sendMessage(message, emitMinutes)
           
            local subject = (dz.moduleLabel or 'frietpan'):gsub('#','')
            dz.notify(subject, message, dz.PRIORITY_MEDIUM, dz.SOUND_PERSISTENT, nil, dz.NSS_TELEGRAM)

            sendMQTT(message)
           
            dz.log(message,dz.LOG_DEBUG)
            if emitMinutes ~= nil then dz.emitEvent(myEvent, emitMinutes).afterMin(emitMinutes) end
            -- if emitMinutes ~= nil then dz.emitEvent(myEvent, emitMinutes).afterSec(emitMinutes) end -- for test only
        end
       
        if item.isDevice and item.state == 'On' then
            sendMessage(msgAan, klaarDelay)
                       
        elseif item.isCustomEvent and myDevice.state == 'On' and tonumber(item.data) == klaarDelay then
            sendMessage(msgKlaar, OffDelay)
           
        elseif item.isCustomEvent and myDevice.state == 'On' and tonumber(item.data) == OffDelay then
            myDevice.switchOff().silent()
            sendMessage(msgWordt)
           
        elseif item.isDevice and item.state == 'Off' then
            sendMessage(msgUit)
           
        end
    end
}

Thanx! Working, in node red the mqtt node return the “message” but also returns 4 errors:

Code: Select all

 Unexpected token D in JSON at position 0

Could it be that the message is expected in JSON format?

Edit:
I already figured it out.
the domoticz/out topic is default topic in the MQTT domoticz plugin.
All device messages send to this topic are in JSON format by default.
the messages send by this script to this topic are in a String format. which causes the error in node-red.
Is it possible to send only the messages to mqtt in this JSON format :

Code: Select all

local msgAan = '{"msg": "De frietpan is aangezet!"}'

[waaren]

Is it possible to send only the messages to mqtt in this JSON format :

Code: Select all

local msgAan = '{"msg": "De frietpan is aangezet!"}'

Yes. If you replace function sendMQTT in the script with this snippet it should do just that.

Code: Select all

        local function sendMQTT(message, topic)
            local MQTTTopic = topic or 'domoticz/out'
            local json = {} json.msg = message
            json = dz.utils.toJSON(json)
        
            osCommand ( 'mosquitto_pub' ..  ' -t '  .. MQTTTopic .. " -m '" .. json .. "'")
        end

[gschmidt]

Is it possible to send only the messages to mqtt in this JSON format :

Code: Select all

local msgAan = '{"msg": "De frietpan is aangezet!"}'

Yes. If you replace function sendMQTT in the script with this snippet it should do just that.

Code: Select all

        local function sendMQTT(message, topic)
            local MQTTTopic = topic or 'domoticz/out'
            local json = {} json.msg = message
            json = dz.utils.toJSON(json)
        
            osCommand ( 'mosquitto_pub' ..  ' -t '  .. MQTTTopic .. " -m '" .. json .. "'")
        end

Correctomundo, thanx!