Hello,
I have the same or similar problems. I have been using smoke detectors of version 2 for nearly 2 years. I would like to share my experiences with you over the last two years.
In the first year:
I had installed two smoke detectors in the basement, they had produced false alarms after about 6 months. Preferably at night. These I have sent back after several times of troubleshooting(sensitivity adjusted, Blowing with compressor, basement ventilation multiple as usual, take battery a couple of days away) to the seller. (No exchange, in which case I preferred the money.)
Three other smoke detectors (version 2), which are distributed in the house, also reported alternating frequently false alarms. Again for no apparent reason. The values in the UI of the smoke detector give no information or the UI has no values only the temperature. But the temperature was static. If I have problems, then preferably at night. And when it starts again with false alarms, then usually several nights in succession.
In the second year:
I can circumscribe the false alarms. The false alarms are dependent on the season. The smoke detectors make most false alarms in the summer months. Almost, several nights, always again. In the winter months it is isolated, rather, if it is perhaps in the rooms by heating a little warmer.
I also tried to exchange the smoke detectors between the rooms. What is noticeable was interesting, a smoke detector (ground floor), which had never produced false alarms so far, I packed into the attic, where there were more frequent false alarms. And it did not take long, then this smoke detector also had false alarms.
Of 9 smoke detectors, 7 smoke detectors often have false alarms. The two smoke detectors, which have no false alarms, are on the ground floor. All other smoke detectors on the upper floor, attic or cellar have always had false alarms.
After the false alarms accumulated at the end of July, I removed all smoke detectors with false alarms in the rooms and placed them directly (30 cm away) next to the antenna from the HC2 (in the basement). Since then the smoke detectors have not had a false alarm. (since two and a half month)
My personal conclusion
I had a long time the hope that Fibaro provides a solution to the known problems. But, you have to keep in mind that after so many false alarms, the confidence in the smoke detectors is no longer given, because you only think of a false alarm instead of a fire alarm. Apart from the countless sleepless nights. According to the findings in the last two years, the smoke detectors go back to the seller before the warranty is over and I let the seller refund my money.
In my opinion, Fibaro has miss, despite known problems, to present a solution against the false alarms in recent years.