Hi guys,
i have seen a few of you using the Atmega4808/Atmega4809.
For now im using the LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100); to catch the RX window but i try to find a way to remove this line.
For adding a proper Quartz oscillator i need to add a driver circuit, but this will use more current
Adjusting the CLKCTRL_OSC20MCALIBA, the granularity is too low and does not match the 100ppm s needed(and Jitter)
Use the XOSC32 external crystal as source for the lmic os ticks (#define OSTICKS_PER_SEC 32768 seems to fit neat)
I asked the nice guys at avrfreaks, but before replying there i want to ask you for your experience with this Topic