Depends on the region. That duty cycle limitation sounds like EU. In USA, there are fewer restrictions on 915MHz, but heavy limits on 434 MHz under part 15. (Su

Depends on the region. That duty cycle limitation sounds like EU. In USA, there are fewer restrictions on 915MHz, but heavy limits on 434 MHz under part 15. (Subsec 15.235 does not permit pre-determined intervals and 1/sec would definitely not fly!) Then again, the primary user of 434MHz is actually amateur radio, on which you can operate beacon transmissions if you care to!!