Though RF24 works quite well at my home, at remote location it's quite on/off. It can work for single measurement or one day or several days, and then have no data for a week. The gateway is running well, since it regularly contacts web server to get new set value(s) even on periods with no data.
This led me to suspect problem with RF24, and to order 15 RFM69 radios + level converters. Boy, are they laborious to solder together and to proto shield (no more jumper wires ) on top of Uno! I could make and then test 2 pieces in one day, with magnifying glasses and 3rd hand. Damn 2mm raster on RFM69!
If I can get RF24 working good enough, I'll stick with them. For good