Re: FRStack Web APIs for RPi with FRStack Node Red Flows
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Wow that is great, it would be nice if someone could build a SDCard Image with the basic NODE-RED and FRStack already installed and put it in a drop box somewhere for some of us dummys?to add our flows to and go. It takes me a LONG time to wrap my head around this stuff starting in the middle, I tried to install FRStack but I got really?busy this week at work with some E911 and Public safety Radio system problems.? Anyway thanks guys for sharing your knowledge with us.
Bret WX7Y ?
oppps. ? Wrong screenshot on the second part.? I will try again:
Alan
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Here is how I set up my first flow to use RPI FRStack.? I wanted to get the Flex PA volts.? I am showing how I did it.? There will be many ways to use the new FRStack, this is just the first way to illustrate one option we have been provided in ?RPI FRStack.
Flow variables are on/from a single flow. Global variables are on/from all your flows.
I noticed that all or most of the Flex data points, in RPI FRStack, are stored in Node-Red as "context variables".? This is like when we use flow.set or global.set to store a variable in memory.
Here is a screenshot of how you can see and use the context variables. ? Be sure to hit the "refresh" button to see the current?values.? Expand each lists to see all the variables:
Here is how I configured a "Change" node to get, whatever variable you want:
Now, you have the Flex variable of choice in msg.payload. ? Now, how you use the data in Node-Red is endless!
Alan WA9WUD
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