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mh- / corona-warn-companion-android

Android App Which Shows Details about CWA Exposures (Requires Root or CCTG or RaMBLE Apps)
GNU General Public License v3.0
130 stars 22 forks source link

if -120db distance is not that risky than 100db why the dots for -120db are red #158

Open elschman opened 2 years ago

elschman commented 2 years ago

I guess the risk analysis screen could be improved.

cos my understanding is that -120db distance(attenuation) is better than 100db than the dots should be shown with colors the other way around.

If -120db Attenuation is really a -120db attenuation ... it would be cool cos than means -120 db signal reduction or 120db signal improvement

elschman commented 2 years ago

Screenshot_20220309-113626_Warn-App-Companion

mh- commented 2 years ago

Looks like there's a sign error somewhere, either in the database that WAC reads from, or in the WAC code that reads from the database. Could you please specify which database you are using? Google Mobile Services (GMS) or something that tries to replicate GMS in LineageOS?

elschman commented 2 years ago

how can I determine ? I installed lineagos so may this is the right answer.

t0mcat1337 commented 2 years ago

Me too is a little confused about the analysis screen.

Screenshot_20220311-001906_Warn-App-Companion

As can be seen the screen shows just 2 green dots in a time range of 1 minute. Why has the risk a value of 8, the highest?

App is running on a Samsung Galaxy S20 FE, stock rom. Data was shared via the cctg app.

mh- commented 2 years ago

That value is only a property of the Diagnosis Key which matched. It might mean that the person who reported was very infectious on the day when that key was used, but the assignment of these values by RKI changed over time.

t0mcat1337 commented 2 years ago

OK I see... I thought the CWAC uses simliar algorithms as the official CWA does to calculate the risk (How long was/were the contact(s)? What was/were the distances? a.s.o.). So one has to interpret the real risk completely by oneself, correct? Perhaps this should made more clear in the docs, imho. Otherwise a value of "8" could make users ... lets say ... nervous ;) .

Remaining the green coloured dots, which are the same for me as for the @elschman ....