X-10 on/off toggle wont stay on

Fresh install on Rasp Lit on RPI 3B+
as per the Python VE install

Added three x10 devices controlled by a CM11 on /dev/ttyUSB0 to configuration.yaml as per the documentation on here

light:

  • platform: x10
    devices:
    • id: b1
      name: Big
    • id: b2
      name: med
      devices:
    • id: b3
      name: Radio

I can turn the devices on, but not off.

They turn on, wait a second and the toggle flicks back to off, but the device stays on.
Cannot then turn the device off.

From a few threads I have found about other devices, I think this could be a device state/status issue but cant see what to do about it , and as X10 units do not report device status, guessing some ‘fudge’ to get around this ?

In a separate Terminal type heyu engine while HA is running. You need to setup a systemd service to run heyu on boot.

OK, got it sorted.
got the Heyu Engine starting from systemd as a service now and all is good