I have been running around in circles for the last couple of hours with a flow I am/was trying to get working. This is the cut down version. It is a mess, because I slapped it together to show something I don't get. Walk through: 4 buttons. Top two set the "mode" (mood if you will) of things. …

Cannot import the flow due to some unknown node. But open the function node, what do you see ? [19] Not sure if that is related to your problem (because I don't understand your problem).

I shall check that in a moment. To all: Sorry about the FAN node used. Here is the flow with out the extraneous node. (Update via edit) Ok, tried that. No change in the output HOWEVER now I am getting SyntaxError: Unexpected token u in JSON at position 0 which I wasn't getting originally. Ye…

(sorry....) Here is the two packets I send from the two buttons. Packet 1 - works. {"payload":"","topic":"undervoltage","_msgid":"4a71a3d1.8d1b6c"} Packet 2 - fails {"payload":"…

Hi, [image] Trying_to_learn: SyntaxError: Unexpected token u in JSON at position 0 This might be a bug but its not really an issue. consider this... You create a new msg in your function node set payload to "some html" and topic to a value In your dashboard text, you use {{msg.topic}} …

[image] Steve-Mcl: Some questions on your code and design ... why are you generating HTML in the FB? Why not send colour and icon as properties of payload - then use a template in the value field. No need for a function block at all. Why are you always creating a new msg , just update the one …

[image] Trying_to_learn: The real flow is a lot bigger and complex . If you want I can post it to you but it needs a few external nodes. No need. I now understand. Perfectly acceptable reason. [image] Trying_to_learn: But I am not sure it is applicable for all cases. In this case could …

[image] Trying_to_learn: Yes, if this was just HTML you wouldn’t have to deal with \ . But this is using HTML code inside a JavaScript string in the payload. For JavaScript strings you’ve to wrap the entire thing in quotes. It will see it as string from the first quote until the second. The lime…

[image] Trying_to_learn: Why is it that if the msg.topic is not set it doesn't work? Look at what you have in the ui_text node [07%20AM] when a message comes in, and it tries to build the label, what do you think will happen if the msg has no msg.topic?? Should it look to see if the data c…

But he has used single quotes in his function node for the string. In inner parts he uses double quotes but unnecessary escapes them. I only ask as it would seem he doesn't understand why. Unless I'm missing something?

Paul, I kind of agree with what you are saying. However.... For more than an hour I was on the RPI pulling my hair out wondering why it wasn't working. I hacked it down to a smaller flow and put it on the NUC and studied it relentlessly. There were no errors reported to me on either machine. I…

Buttons, messages, topics and weird things with messages

Dashboard

zenofmud 7 September 2019 22:18 15

FYI. I opened another thread about the label issue and went back and forth with Dave about it. He fixed a bug dealing with labels in Master

Topic		Replies	Views
Button node bug report. (Look at bottom) General	31	814	1 March 2021
Should UI nodes create an empty msg.topic if it is left blank? Dashboard	8	1469	10 September 2019
Unexpected token D in JSON at position 0 General	46	6332	13 April 2020
Button text not visible on first load Dashboard node-red-dashboard	30	1384	4 October 2021
Is this a JSON string? General	23	2594	31 August 2020

Buttons, messages, topics and weird things with messages

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