Hi, i would like to implement something like this: receiving messages from mqtt subscription at: domoticz/out of course many messages in json format will arrive but i want to filter some messages inparticular. from this messages i need to take two value: name and svalue and with this two paramet…

[image] megamarco83: it's missing the payload, right? Exactly. There are a couple of mistakes on the the last rule in change node named "change: 2 rules". Correct the typo and change from set to move and it should work. [a-02] [image] megamarco83: it means that i will edit manually insi…

[image] megamarco83: how to set it as parsed, sorry, but i do not know I would still be interested to know this. If you open the MQTT node you will see a field labelled Output. One of the options is Parsed JSON (which means it expects the value to be a JSON string and it attempts to parse i…

[image] Colin: I would still be interested to know this. If you open the MQTT node you will see a field labelled Output. One of the options is Parsed JSON (which means it expects the value to be a JSON string and it attempts to parse it into a javascript object. Where is this strangely format…

If you look at your very first post you will see it doens't look like that but is shown as a string. I think that was probably the debug from after the JSON node, which is converting it back from a javascript object to JSON string. I haven't followed @Andrei 's solution fully so I am not sure wheth…

[quote="Colin, post:22, topic:22512, full:true"] If you look at your very first post you will see it doens't look like that but is shown as a string. I think that was probably the debug from after the JSON node, which is converting it back from a javascript object to JSON string.[/quote] i think …

The difference between the two is that the output from the mqtt with output set to parsed json is an object (note it says domoticz/out : msg.payload : Object``` the message from mqtt has been parsed from JSON into a javascript object, whereas after the JSON node it is a string domoticz/out : msg…

ok, nice to see that we will be able to work with objects as our input data. The only place where we can get line feeds characters is on the description field, which is not a big issue. I will then proceed with finishing the flow. Edit: I am staring at the flow without knowing what else to do …

ehmm nothing else :slight_smile: substitution of injection block with mqtt should generate the correct output. [immagine] i connect a mqtt inuput and i wrote as topic domoticz/out i connect at the end of the flow an mqtt out and i do not write nothing inside topic. now i see a very strange beh…

[image] megamarco83: now i see a very strange behaviour.... i see many relays triggering. relays that's are related to lights and so no....relay that are not for blinds So let´s fix it. The best thing to do is to create a branch in the flow that separates topics. We will process only messag…

[image] Andrei: So let´s fix it. The best thing to do is to create a branch in the flow that separates topics. Hi Andrei, i tested your flow like this: [{"id":"fe7efaec.233288","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"fccc17e4.f88d6","type":"inject","z":"fe7efaec.2332…

[image] megamarco83: we should send out message like this: topic = cmnd/tasmota_blind/shutterposition1 payload = 40 How we can manage this? Easy fix. Please see below flow. [{"id":"23dc9ff4.66a6a","type":"inject","z":"b3412710.dacd38","name":"topic=tasmota_blind\\nblind=1","topic":"","pay…

Extract two values from mqtt message(json type) and create a new mqtt with these two

General

Andrei 4 March 2020 16:45 31

Nice, I am happy to know.

Yes, that is correct.

Exactly, when we want to send messages via MQTT we need to create a topic and a payload. The topic creation in your specific use case is dynamic, based on the description field from the input messages. At the end of the day the flow is one of the simplest possible: just a switch node plus a change node.

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Extract two values from mqtt message(json type) and create a new mqtt with these two

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