Allright, I have replaced the nrf chips to those with + and... that was it, everything is working very well now :)
Here they are, freshly handmade :)

@Nca78 The euro version doesn't. Just the ULN2003A.
Unfortunately, I can't attach images for some unknown reason.

Finally :)
That's a single button switch.

@Flor-Sanders I think you maybe should choose not USB but Ethernet gateway in domoticz.