Tried a few more alternatives, got to know nRF Connect a bit better, but otherwise no joy. There is obviously a connection between the smartphone and the Ruuvi Station, because the red led goes out and the green lights up and stays on. nRF says however Not Bonded. Is this important?. The zip file I have downloaded is ruuvi_firmware_dfu_1.2.12.zip and I select "Distribution packet (ZIP) from the list. But I don’t get that progress graph that’s shown in the video. All I get is the name of the zip file, and that’s it.
Under “Characteristics” of the Ruuvi nRF gives:
Device type: LE only
Adv, type: Legacy
Flags: GeneralDiscoverable, BrEdrNotSupported
To my newbie eye it looks as if although the devices are connected, the download from the phone to the station just doesn’t happen. The green led stays on until I press R again. Then the red led lights up, says lit for a moment, and then goes out, leaving the faint flashing green led and the station running as before. I have not been able to get the flashing red led you mention at any stage.
BTW about the glueing! The cover comes off without any trouble, but the electronics card itself cannot be removed from the case, as is shown in the video. One can still press the switches, though it’s not quite so easy as when the electronics card is removed from the case.