Write to multiple RIO scratchpad using 1 groov i/o write node

Node-RED
3

Bingo!
Spoke with some programmers here and hit paydirt…
Don’t use the groov IO Write node… Use the groov Manage API.

See the PUT at /api/v1/io/{device}/scratchpad/{datatype}/index . The docs say “Writes to one or more scratch pad elements.”

That should do exactly what you are asking

Tip, from groov Manage menu, Click on ‘Info and Help’ → ‘Rest APIs’ → ‘groov Manage’.

Terry has done a great post here that should get you up and running in short order:

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