Consistency on Chart Colors With Live Data

[aa0z]

I've got quite a few charts & bar graphs in my dashboard that populate with live data.

Being a newbie to charts and populating them with live data, no matter at the time interval the data gets pushed to a chart node, how can I ensure the same msg.topics get set to the same color in every chart or bar graph?

I have the following function right before my chart to populate the chart.

let total = msg.payload.total;
let band = msg.payload.band;

if (band == '1.8')
{
    band = '160M'
}
if (band == '3.5')
{
    band = '80M'
}
if (band == '7')
{
    band = '40M'
}
if (band == '14')
{
    band = '20M'
}
if (band == '21')
{
    band = '15M'
}
if (band == '28')
{
    band = '10M'
}

msg.topic = band;
msg.payload = total;

return msg;

Thanks
Kyle

[E1cid]

Here is one way

Chart line color

No super simple way to do that. But what you can do is preset them in the order you want. The colours are set in the config. The first topic to arrive gets first colour, etc. So create an inject that sends a null message on each topic in order you want at deploy time. Then when real data arrives it will pick up the colour you want.

[aa0z]

Ugh...that is nasty. Ok, thanks for the reply.

[Trying_to_learn]

Not really.

All you do is have an inject node and create a message which has an empty message with the same structure as your incoming messages with their data and have the fields set to blanks.

One node, one message injected at the start.

If you want to get more complicated there are other ways of doing with with the join node.
But that has it's own set of problems.