Wow. So the offset is progressively getting worse by increasing frequency? Interesting find. Sounds like some calculation mishap in the demodulator code. Now, that's one part no one is very familiar with, except for the original author who abandoned the code... Maybe something similar is happening in the US band.
On Sun, Mar 17, 2019 at 1:50 AM <[email protected]> wrote: > On Saturday, 16 March 2019 17:44:35 UTC-3, [email protected] wrote: >> >> With the set I found by trial and error I can read three (or four if I >> want) of my Davis transmitters at once. These EU frequency set has no >> constant offset with the EU RFM69 frequencies BTW. >> > > I found a correlation formula between the RFM69 frequencies and my EU > trial-and-error frequency set. > > rtldavis frequency = (RFM69 frequency -40000000) * 1,048319523 > > These calculated rtldavis frequencies DO work! > > Excel gave the following equation: y = 1.0439x - 4E+07, but the factor was > not precise enough. > > The results: > > RFM69 rtldavis > 868066711 868078500 > 868181885 868199238 > 868297119 868320041 > 868412292 868440779 > 868527466 868561518 > > Luc > >
