"Explanation: the frequencies of the original rtldavis program and the sorted RFM69 frequencies all differ about 26000 Hz from each other."
It's worth noting that there are too many unknown variables here. Questions: - Do we know that the original rtldavis author used a frequency offset calibrated device, ie. his frequencies are correct? - Do you all use calibrated (or at least offset corrected) SDR radios? If not, you need to determine the offset and apply it. - Does the RFM69 Arduino/Moteino code work for your stations? If so, then the RFM69 frequencies are correct, and the original rtldavis frequencies are most likely incorrect. Since I've multiple reports (including the original RFM69 code author, Dekay) that the RFM69 frequencies for US are working, I'm positive they should work for a calibrated SDR stick, too. On Thursday, March 14, 2019 at 1:31:45 AM UTC+1, [email protected] wrote: > > Hi, it’s me again! > > Rich, may be a last quick step to try, before writing a test program. > > What you can do is the following: > > Take the list of RFM69 frequencies in your spread sheet. > Sort them from low to high. > Subtract from each of the 51 frequencies the value 26062 (Hz) > Use these smaller (and sorted) frequencies in protogol.go > > Explanation: the frequencies of the original rtldavis program and the > sorted RFM69 frequencies all differ about 26000 Hz from each other. > > The sorted hop frequencies differ about 51000 Hz from their ‘neighbour’ > frequency, so an offset of 26000 Hz from the good frequency is too much as > we have seen. > > Test have already shown that the first frequency of rtldavis is good: we > received the data of both transmitters. The first RFM69 frequency differs > 26062 Hz with the first rtldavis frequency. > > Let me know if you like the idea or have any questions. > > Cheers, Luc
