Official information about this FCC ID PAXPMV107J says that Frequency Range is 314.98 MHz, but not 315.98MHz as you mentioned in README.md. Using radio receiver I can confirm, that every 90 seconds on this frequency I can see short signal.
Yep, definitely a typo of mine, fixed the README! The receiver code centers its window around 314.985MHz and the transmitter code center frequency is 314.98MHz.
Official information about this FCC ID PAXPMV107J says that Frequency Range is 314.98 MHz, but not 315.98MHz as you mentioned in README.md. Using radio receiver I can confirm, that every 90 seconds on this frequency I can see short signal.
https://fccid.io/PAXPMV107J