Can you try this driver then? The driver is intended to handle the much more complex 4-in-1 motion sensors and is maybe overkill for this simple motion sensor... but maybe not?
Please first change to the linked driver, then REMOVE the device from its web page, then remove the batter for few minutes and pair it again to HE. The driver should be automatically selected. If it still doesn't work, we can handle it in there.
