I am using a "duet3 mb6hc (3.4.5)" to build a hangprinter Ver4. https://hangprinter.org/doc/v4/

I tried to send GCode commands following this github wiki: https://github.com/Duet3D/RepRapFirmware/wiki/HTTP-requests

But I haven't received a response. I know that the Python code is okay because I have used the same technique in different Duet3 hanging printer builds.

Can anyone help me? How can I send GCODE commands programmatically with my current setup?" to build