How to send this HEX command to my device using Node-red

Thanks for replying, yes the content of the function and the reply before was for this:

Then I rewrote it in this form:

  • I have changed the Serial Port Setting to delivering binary buffer.
  • The error:

is coming from the Serial Node and not from the debugger attached to it. The serial node will stay waiting until I redeploy something and then also no response from the debugger attached to the serial node.