Hi all, I've got an sonoff TH (tasmota) switch with an SI7021 temperature and humidity sensor on it I would like to create a node that switches the sonoff on when reaching an max humitidy so it can start a fan, and of course the other way to shut it off. Any pointers or sombody has the same probl…

What part don't you know how to do? Read the humidity Compare it with a limit Switch the fan off/on [Edit] If point 2 is the issue see this recent thread asking a very similar question Front montant du signal Read the full thread.

yes, it's indeed 1 and 2 i can see the values but don't know ho to seperate the humidity and feed it to the switch to compare This is the msg.payload {"Time":"2020-09-24T12:05:24","SI7021":{"Temperature":20.1,"Humidity":61.5,"DewPoint":12.5},"TempUnit":"C"}

OK, I suggest start by reading the node red docs page Working With Messages which will show you how to do it I think. Also look through the other docs there. In fact it is probably worth taking and hour out and watching the node red essentials vidoes which are linked from the docs. You will save …

Played a little with it , this is the result of my payload 16-10-2020 17:33:19node: PAYLOAD msg.payload : string[161] string[161] { "Time": "2020-10-16T16:33:20", "SI7021": { "Temperature": 17.3, "Humidity": 62.8, "DewPoint": 10.1 }, "TempUnit": "C" } Wich is completely different from t…

That is because it is a string, run it through the json node to create the javascript object. Then msg.payload.humidity will be available

thx, but it's the same... flows (7).json (1.1 KB)

export flow to clipboard and paste the flow between backticks example below. i do not download files. ``` paste text here ```

Please place between backticks as asked, it provides a copy link and makes helpers life easier. And delete the other post. Messy threads are hard to read

sorry newbie here, i don't understand what you mean by this :wink:

[image] How to share code or flow json FAQs To share code samples or flow json in this forum, you need to take care to format it properly so that it is displayed correctly. The easiest way to do that is to click the 'Preformatted Text' button in the toolbar: [image] The…

Node-RED

Node-RED Forum

Sonoff TH with SI7021 humidity sensor

General

dceejay 16 October 2020 16:56 13

Topic		Replies	Views
Activate switch based on humidity General	8	1641	14 June 2020
Want to run if/then actions based upon MQTT humidity level sensor General	28	2135	4 September 2021
Simple Flow read humidity and turn fan on and off General	34	689	27 May 2024
Turn On and Off Mist Maker When the Humidity is Compared with the Humidity Set By the User Dashboard node-red-dashboard	6	188	27 November 2022
Switch SmartPlug according to Humidity General	4	643	3 January 2021

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Sonoff TH with SI7021 humidity sensor

Related topics