Hi All
New to Red-Node.
I expect this to be a simple thing, how do I get to display words when the output is a number. (I have tried reading, looking for examples, google foo, all my tests fail).
ie. Charger state = 0 to display Off
Value types
0 - Off
2 - Fault
3 - Bulk
4 - Absorption
5 - Float
6 - Storage
7 - Equalize
245 - Off
247 - Equalize
252 - External Control
So basically if a value turns up I want to replace it with a text message.
Thanks in advance
Cheers
Mark
Hi @Mark
Im not a javascript programmer so i might use the wrong terms here. But what you want is a map.
define the map like this:
const statusMap = {
0: 'Off',
2: 'Fault',
3: 'Bulk',
4: 'Absorption',
5: 'Float',
6: 'Storage',
7: 'Equalize',
245: 'Off',
247: 'Equalize',
252: 'External Control'
};
Then to get the message from the number you would go
statusMap[0] would output Off
So if the message coming into the function node is the number and you want to output the message you would do:
msg.payload = statusMap[msg.payload];
Hope this helps
The other option is you can probably get a change node to do this. Depending on if you'll have other payloads with those numbers in. ie change from 0 to Off.
and repeat for each code. However this probably wont work if you have other messages that happen to include '0'
Hi this is what I’m looking for.
But can you answer where do I put this code?
You'd put a function node in.
the nodes that get the data into the function node:
Then function node would then be something like: (please test before using)
const statusMap = {
0: 'Off',
2: 'Fault',
3: 'Bulk',
4: 'Absorption',
5: 'Float',
6: 'Storage',
7: 'Equalize',
245: 'Off',
247: 'Equalize',
252: 'External Control'
};
msg.payload = statusMap[msg.payload];
return msg.payload;
ANd then the output of function node would continue to wherever you need the message names to (ie message names will be stored in msg.payload
But that is a nice idea. I can modify the nodes to also output the text value in case of an enumerated type as `msg.textvalue`. Which I'll add to the 1.5.14 release of node-red-contrib-victron (note that it will still take a while before being part of the normal Venus release)
Modified the code to show the textual value of the enums together with the value. And also output the value as `msg.textvalue`. I'll make a release of it and see if it can be squeezed into the next beta release.
Sounds good.
I know the VRM portal displays this info.
Worked it out
Using convert payload
I tried change mode first but it did not work for me. Endless hair pulling I gave up on this idea.
Thanks
