Thanks for the information.
On Tue, Mar 21, 2017 at 5:24 PM, Aleksander Morgado <[email protected]> wrote: > On Tue, Mar 21, 2017 at 5:04 PM, José <[email protected]> wrote: >> ModemManager reports look like this: >> >> Status | lock: 'none' >> | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10)' >> | state: 'connected' >> | power state: 'on' >> | access tech: 'hsdpa' >> | signal quality: '38' (recent) >> >> I have some questinos about the signal quality quantity: >> >> * Which units does the 'signal quality' use? > > It's a percentage value (0-100). The "recent" flag tells us whether > the signal was refreshed in the last 30s IIRC. > >> * Is it the same for any technology/modem? >> * How does it relate to RSSI and dbm? > > Everywhere should be based on RSSI (dBm), scaled differently depending > on how the value is retrieved from the modem. > > E.g. if given in dBm directly, scaled between -113dBm and -51dBm: > https://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/mm-broadband-modem-qmi.c#n2627 > > Or if already given scaled between 0 and 31 as in +CSQ: > https://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/mm-broadband-modem.c#n1805 > > Note that if you want "raw" technology-specific values, some modems > (like QMI) provide the "extended" Signal interface, see: > https://www.freedesktop.org/software/ModemManager/api/latest/gdbus-org.freedesktop.ModemManager1.Modem.Signal.html > > -- > Aleksander > https://aleksander.es _______________________________________________ ModemManager-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
