Yesterday I've successfully tested Minla with backup PPM receiver control.
I've used Orange R615X receiver in PPM mode and connected it to Minla PPM input pin.
In flight switch between internet control and Orange PPM receiver control is done automatically, with priority given to PPM receiver. Means if rc transmitter is in the range, PPM receiver takes control of the drone. When rc transmitter is turned off or out of range, control is given to internet control panel.
New video on minla youtube channel will be published soon to explain this feature in all details.
Minla firmware v0.10 (alpha): minla_v0.10_firmware.dfu
Minla firmware v0.10 (alpha): minla_v0.10_firmware.dfu