Thank you for your prompt answer knro.
But my request was refused as follows. I think my setup of the system may have some problem or imperfection.

pi@ras_pi1:~ $ indi_setprop "EFW.FILTER_SLOT.FILTER_SLOT_VALUE=1"
connect: Connection refused
pi@ras_pi1:~ $ sudo indi_setprop "EFW.FILTER_SLOT.FILTER_SLOT_VALUE=1"
connect: Connection refused

Best regards,
Tatsuji

Read More...