Louis,
Following is link to json I wrote to interface with my ACOM 600S serial port.? This was less expensive than using the ACOM e-Box ethernet interface (for 600S, 700S, 1200S, ...) selling for US$599.? Take a look at the file posted in October.? I don't know if the 1200S and 600S have exactly the serial protocol.
/g/nodered-hamradio/files/acom600-ldg-flex-streamdeck flow.json
73 George
K7GRJ