Sorry, I should have looked at the link you posted first. It seems fairly clear from that, assuming the device there is the same as yours. Initially I suggest forgetting about node red and get the code there working from the command line as is shown in the link. Once that is working then you can think about getting the data into node red.
One thing to think about though. He is using polling to read the encoder, which means that if the processor is doing something while the encoder is moving and it is not able to poll for a period greater than 1/96th of a revolution then you will loose position. Personally I would probably stick with the dedicated hardware for the encoder position.
Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
The OpenJS Foundation | Terms of Use | Privacy Policy | OpenJS Foundation Bylaws | Trademark Policy | Trademark List | Cookie Policy