[Ovmsdev] 3G / 2G fallback on SIM5360 Europe?

Chris van der Meijden chris at arachnon.de
Wed Aug 5 16:08:03 HKT 2020


Hi Michael,
the antenna seems not to be active according to the wiring diagram and
some forum posts I found.
I double checked the connection of GPS and GSM. Seems to OK ...
Greetinx
Chris

Am Mittwoch, den 05.08.2020, 08:01 +0200 schrieb Michael Balzer:
>     Chris,
> 
>     
> 
>     two additional thoughts:
> 
>     
> 
>     - maybe the VW antenna contains a GSM and a GPS antenna (?), and
> you
>     connected the wrong one?
> 
>     
> 
>     - maybe the VW antenna is an active one and needs a supply
> voltage
>     which is currently missing?
> 
>     
> 
>     Regards,
> 
>     Michael
> 
>     
> 
>     
> 
>     Am 05.08.20 um 07:24 schrieb Mark
>       Webb-Johnson:
> 
>     
> 
>     
> >       
> >       Maybe,
> >       
> > 
> >       
> >       Or the VW antenna is way off on specification.
> >       
> > 
> >       
> >       Regards, Mark.
> > 
> >         
> > 
> >           
> > >             On 5 Aug 2020, at 1:17 PM, Chris van der
> > >               Meijden <chris at arachnon.de> wrote:
> > >             
> > > 
> > >             
> > >               
> > >               
> > >                 Thank you for your response.
> > >                 
> > > 
> > >                 
> > >                 That leaves me with a poor home made SMA
> > >                   to Fakra adapter cable, I guess ...
> > >                 
> > > 
> > >                 
> > >                 Regards
> > >                 
> > > 
> > >                 
> > >                 Chris
> > >                 
> > > 
> > >                 
> > >                 Am Mittwoch, den 05.08.2020, 09:27 +0800
> > >                   schrieb Mark Webb-Johnson:
> > >                 
> > > > The antenna surely
> > > >                   helps, but in some locations you can receive
> > > > a signal
> > > >                   with a piece of wet string resting on the
> > > > antenna
> > > >                   connection. Seriously. At my office desktop,
> > > > I still
> > > >                   get 3G without an antenna connected (but I
> > > > don’t
> > > >                   recommend it due to possible feedback in the
> > > > modem
> > > >                   module).
> > > >                   
> > > > 
> > > >                   
> > > >                   These are not binary on/off situations.
> > > >                     An antenna rated to 1710-1990 will still
> > > > work at
> > > >                     1991, or even 2100, but just not optimally
> > > > with the
> > > >                     best reception or transmission.
> > > > 
> > > >                     
> > > > 
> > > >                     
> > > >                     The original Fasttech antennas were
> > > >                       designed for 2G (OVMS v2), but should
> > > > still cover
> > > >                       some 3G ranges optimally. The newer ones
> > > > (from
> > > >                       Medlock in USA and OpenEnergyMonitor in
> > > > UK) should
> > > >                       cover all ranges (up to and including 4G
> > > > LTE) -
> > > >                       and we used these for radio certification
> > > > so have
> > > >                       been very thoroughly tested at all the
> > > > supported
> > > >                       2G and 3G frequency ranges.
> > > >                     
> > > > 
> > > >                     
> > > >                     Regards, Mark.
> > > >                     
> > > > 
> > > >                       
> > > > >                         On 5 Aug 2020, at 12:21 AM, Chris
> > > > >                           van der Meijden <chris at arachnon.de>
> > > > >                           wrote:
> > > > >                         
> > > > > 
> > > > >                         
> > > > >                           
> > > > >                           
> > > > >                             Still digging on the subject
> > > > >                               ...
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Today I took my original
> > > > >                               Fasttech OVMS v2 antenna out of
> > > > > my Nissan
> > > > >                               Leaf and connected it to the
> > > > > OVMS v3 in
> > > > >                               our VW e-Up. And surprise,
> > > > > surprise I got
> > > > >                               direct connection over the SIM
> > > > > to the
> > > > >                               network.
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             The VW antenna gives me -101
> > > > >                               dBm, the Fasttech antenna gives
> > > > > me -91
> > > > >                               dBm.
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             So I took a look at the
> > > > >                               frequencies ...
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             The old fasttech antenna has a
> > > > >                               frequency range of 824-960 /
> > > > > 1710-1990.
> > > > >                             
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             o2 (my SIM card provider) uses
> > > > >                               GSM 900 and GSM+LTE 1800 for 2g
> > > > > (4g LTE
> > > > >                               cannot be used on the SIM5360)
> > > > > and uses
> > > > >                               UMTS 2100 for 3g.
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Now I have two theories on
> > > > >                               what make things go wrong with
> > > > > the VW
> > > > >                               antenna, but work with the
> > > > > fasttech
> > > > >                               antenna:
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             1. My home made sma / fakra
> > > > >                               adapter cable to the VW antenna
> > > > > is bad
> > > > >                               (could be, but in the city it
> > > > > connects)
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             2. Because 3g on 2100 mHz is
> > > > >                               not available through the
> > > > > fasttech
> > > > >                               antenna, OVMS v3 is forced to
> > > > > 2g and
> > > > >                               everything runs fine.
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Any corrections on the second
> > > > >                               theory are welcome. I'm
> > > > > guessing ...
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             I will buy an other sma 2g/3g
> > > > >                               antenna just to get rid of the
> > > > > problem,
> > > > >                               but will also continue thinking
> > > > > on this
> > > > >                               one.
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Greetinx
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Chris
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             
> > > > > 
> > > > >                             
> > > > >                             Am Montag, den 03.08.2020,
> > > > >                               12:31 +0200 schrieb Chris van
> > > > > der Meijden:
> > > > >                             
> > > > > >                               Hi Michael
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               yeah, economical visionaries
> > > > > >                                 are always a lot of fun :-
> > > > > > ))
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               I read that "GSM voices
> > > > > >                                 services" line too and
> > > > > > checked on that
> > > > > >                                 with my mobile phone. I
> > > > > > restricted the
> > > > > >                                 connection of the phone
> > > > > > with
> > > > > >                                 *#*#4636#*#* to "GSM auto
> > > > > > (PRL)" and it
> > > > > >                                 connects to EDGE. So data
> > > > > > over GSM is
> > > > > >                                 available ...
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               Still mysterious. Will dig
> > > > > >                                 some more ...
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               Greetinx
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               Chris
> > > > > >                                
> > > > > >                               
> > > > > > 
> > > > > >                               
> > > > > >                               Am Montag, den 03.08.2020,
> > > > > >                                 12:21 +0200 schrieb Michael
> > > > > > Balzer:
> > > > > >                               
> > > > > > >  Chris,
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 we don't tell the modem
> > > > > > > to restrict
> > > > > > >                                 itself in any way. Bugs
> > > > > > > in the modem
> > > > > > >                                 firmware are likely, but
> > > > > > > I think a
> > > > > > >                                 serious bug like this
> > > > > > > would have been
> > > > > > >                                 solved early.
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 I've read the pilot
> > > > > > > description now, and
> > > > > > >                                 you need to pay attention
> > > > > > > to this
> > > > > > >                                 section:
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 
> > > > > > > > statt
> > > > > > > >                                   der üblichen drei
> > > > > > > > Dienste LTE, UMTS
> > > > > > > >                                   und GSM kommen in
> > > > > > > > Kirchfarrnbach "nur"
> > > > > > > >                                   LTE 800 und LTE 900
> > > > > > > > für die
> > > > > > > >                                   Datenversorgung sowie
> > > > > > > > GSM für
> > > > > > > >                                   Sprachdienste und SMS
> > > > > > > > zum Einsatz. Auf
> > > > > > > >                                   UMTS haben die
> > > > > > > > Funknetzplaner hier
> > > > > > > >                                   verzichtet, weil
> > > > > > > > bereits LTE und GSM
> > > > > > > >                                   alle Anforderungen
> > > > > > > > der Bevölkerung
> > > > > > > >                                   erfüllen.
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 …translated…
> > > > > > > 
> > > > > > >                                 
> > > > > > > > Instead
> > > > > > > >                                   of the usual three
> > > > > > > > services LTE, UMTS
> > > > > > > >                                   and GSM, "only" LTE
> > > > > > > > 800 and LTE 900
> > > > > > > >                                   are used in
> > > > > > > > Kirchfarrnbach for data
> > > > > > > >                                   supply as well as GSM
> > > > > > > > for voice
> > > > > > > >                                   services and SMS. The
> > > > > > > > radio network
> > > > > > > >                                   planners have
> > > > > > > > dispensed with UMTS here
> > > > > > > >                                   because LTE and GSM
> > > > > > > > already meet all
> > > > > > > >                                   the requirements of
> > > > > > > > the population.
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 So you have neither UMTS
> > > > > > > nor EDGE. GSM
> > > > > > >                                 is only available for
> > > > > > > voice streams and
> > > > > > >                                 SMS. Data is only
> > > > > > > available via LTE.
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 Your only option is to
> > > > > > > tell them they're
> > > > > > >                                 a bunch of … outstanding
> > > > > > > economical
> > > > > > >                                 visionaries, who could
> > > > > > > possibly consider
> > > > > > >                                 rethinking their IoT
> > > > > > > compatibility ;-)
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 Regards,
> > > > > > > 
> > > > > > >                                 Michael
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 
> > > > > > > 
> > > > > > >                                 Am 03.08.20
> > > > > > >                                   um 11:33 schrieb Chris
> > > > > > > van der
> > > > > > >                                   Meijden:
> > > > > > > 
> > > > > > >                                 
> > > > > > >                                 
> > > > > > > >                                   
> > > > > > > >                                   I did some more
> > > > > > > > reading
> > > > > > > >                                     on the SIM5360 and
> > > > > > > > also digged a bit
> > > > > > > >                                     through the simcom
> > > > > > > > source. Found
> > > > > > > >                                     loads of AT-
> > > > > > > > commands there :-)
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   I could not find an
> > > > > > > > AT
> > > > > > > >                                     command to restrict
> > > > > > > > the selection to
> > > > > > > >                                     2g. Perhaps I did
> > > > > > > > not look deep
> > > > > > > >                                     enough, but if
> > > > > > > > someone knows the
> > > > > > > >                                     command ...
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   I'm still thinking
> > > > > > > > why
> > > > > > > >                                     the automatic
> > > > > > > > fallback to 2g does
> > > > > > > >                                     not happen. 
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   - The transmitter
> > > > > > > > offers
> > > > > > > >                                     only 2g (GSM 900
> > > > > > > > mHz) and LTE (800
> > > > > > > >                                     or 1800). No 3g.
> > > > > > > >                                   - I have a signal
> > > > > > > >                                     strength of -110 to
> > > > > > > > -100 dBm
> > > > > > > >                                   - AT+COPS? gives me
> > > > > > > > an
> > > > > > > >                                     empty response.
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   Could it be possible,
> > > > > > > >                                     that somewhere in
> > > > > > > > the code something
> > > > > > > >                                     like
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   - I don't have 3g
> > > > > > > >                                   - I do have LTE
> > > > > > > >                                   - Lets try LTE
> > > > > > > >                                   - I see LTE
> > > > > > > >                                   - I have no hardware
> > > > > > > > for
> > > > > > > >                                     LTE
> > > > > > > >                                   - OK, don't do
> > > > > > > > anything
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   happens? So somehow
> > > > > > > >                                     fallback to 2g
> > > > > > > > never happens?
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   Just guessing around
> > > > > > > > ...
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   Regards
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   Chris
> > > > > > > >                                    
> > > > > > > >                                   
> > > > > > > > 
> > > > > > > >                                   
> > > > > > > >                                   Am Montag, den
> > > > > > > >                                     03.08.2020, 10:10
> > > > > > > > +0800 schrieb Mark
> > > > > > > >                                     Webb-Johnson:
> > > > > > > >                                   
> > > > > > > > > The
> > > > > > > > >                                     SIM5360E should
> > > > > > > > > auto-switch between
> > > > > > > > >                                     2G and 3G. It
> > > > > > > > > supports the following
> > > > > > > > >                                     frequency bands:
> > > > > > > > >                                     
> > > > > > > > > 
> > > > > > > > >                                     
> > > > > > > > >                                     
> > > > > > > > >                                       GSM/GPRS/EDGE
> > > > > > > > >                                           850/900/180
> > > > > > > > > 0/1900MHz;
> > > > > > > > >                                       UMTS/HSPA+
> > > > > > > > >                                           900/2100MHz
> > > > > > > > >                                     
> > > > > > > > >                                     
> > > > > > > > > 
> > > > > > > > >                                     
> > > > > > > > >                                     There are SIMCOM
> > > > > > > > >                                       options/command
> > > > > > > > > s to restrict the
> > > > > > > > >                                       selection, but
> > > > > > > > > the default is
> > > > > > > > >                                       automatic.
> > > > > > > > >                                     
> > > > > > > > > 
> > > > > > > > >                                       Regards, Mark
> > > > > > > > >                                       
> > > > > > > > > 
> > > > > > > > >                                         
> > > > > > > > > >                                           On 2 Aug
> > > > > > > > > > 2020,
> > > > > > > > > >                                             at 6:40
> > > > > > > > > > PM, Chris van der
> > > > > > > > > >                                             Meijden
> > > > > > > > > > <chris at arachnon.de>
> > > > > > > > > >                                             wrote:
> > > > > > > > > >                                           
> > > > > > > > > >                                             
> > > > > > > > > >                                             
> > > > > > > > > >                                               Hey
> > > > > > > > > > Michael
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               Thanx
> > > > > > > > > > for
> > > > > > > > > >                                                 the
> > > > > > > > > > help :-)
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               The
> > > > > > > > > > AT
> > > > > > > > > >                                                 com
> > > > > > > > > > mands are working
> > > > > > > > > >                                                 now
> > > > > > > > > > , but as expected no
> > > > > > > > > >                                                 con
> > > > > > > > > > nection at all. So
> > > > > > > > > >                                                 als
> > > > > > > > > > o no fallback to 2g.
> > > > > > > > > >                                                 Or
> > > > > > > > > > no GPRS offered on 2g
> > > > > > > > > >                                                 ...
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               Here
> > > > > > > > > > some
> > > > > > > > > >                                                 (Ge
> > > > > > > > > > rman) information on
> > > > > > > > > >                                                 the
> > > > > > > > > > "site lite"
> > > > > > > > > >                                                 tra
> > > > > > > > > > nsmitters:
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               https
> > > > > > > > > > ://www.telekom.com/de/blog/netz/artikel/standort-
> > > > > > > > > > light-pilotprojekt-552152
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               I
> > > > > > > > > > also did
> > > > > > > > > >                                                 not
> > > > > > > > > > find any AT command
> > > > > > > > > >                                                 for
> > > > > > > > > > the SIM5360 to force
> > > > > > > > > >                                                 2g.
> > > > > > > > > > I will play a bit
> > > > > > > > > >                                                 aro
> > > > > > > > > > und with the modem in
> > > > > > > > > >                                                 the
> > > > > > > > > > next days. Will also
> > > > > > > > > >                                                 try
> > > > > > > > > > congstar, I do have
> > > > > > > > > >                                                 a
> > > > > > > > > > congstar SIM laying
> > > > > > > > > >                                                 aro
> > > > > > > > > > und here ...
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               Greet
> > > > > > > > > > inx
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               Chris
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                               
> > > > > > > > > >                                               Am
> > > > > > > > > > Sonntag,
> > > > > > > > > >                                                 den
> > > > > > > > > > 02.08.2020, 10:59
> > > > > > > > > >                                                 +02
> > > > > > > > > > 00 schrieb Michael
> > > > > > > > > >                                                 Bal
> > > > > > > > > > zer:
> > > > > > > > > >                                               
> > > > > > > > > > >  Chris,
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 h
> > > > > > > > > > > ow to send modem
> > > > > > > > > > >                                                 c
> > > > > > > > > > > ommands and read the
> > > > > > > > > > >                                                 r
> > > > > > > > > > > esponses:
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 O
> > > > > > > > > > > VMS# log
> > > > > > > > > > >                                                  
> > > > > > > > > > >  level debug simcom
> > > > > > > > > > > 
> > > > > > > > > > >                                                 L
> > > > > > > > > > > ogging
> > > > > > > > > > >                                                  
> > > > > > > > > > >  level for simcom set
> > > > > > > > > > >                                                  
> > > > > > > > > > >  to debug
> > > > > > > > > > > 
> > > > > > > > > > >                                                 O
> > > > > > > > > > > VMS#
> > > > > > > > > > >                                                  
> > > > > > > > > > >  simcom cmd AT+COPS?
> > > > > > > > > > > 
> > > > > > > > > > >                                                 S
> > > > > > > > > > > IMCOM
> > > > > > > > > > >                                                  
> > > > > > > > > > >  command has been sent.
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164488782) simcom: tx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  mcmd ch=4 len=10  :
> > > > > > > > > > >                                                  
> > > > > > > > > > >  AT+COPS?
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164488792) simcom: rx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  line ch=4 len=23  :
> > > > > > > > > > >                                                  
> > > > > > > > > > >  +COPS:
> > > > > > > > > > >                                                  
> > > > > > > > > > >  0,0,"congstar",2
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164488802) simcom: rx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  line ch=4 len=2   : OK
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 N
> > > > > > > > > > > ow let's see if we have
> > > > > > > > > > >                                                 3
> > > > > > > > > > > G:
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 O
> > > > > > > > > > > VMS#
> > > > > > > > > > >                                                  
> > > > > > > > > > >  simcom cmd AT+CPSI?
> > > > > > > > > > > 
> > > > > > > > > > >                                                 S
> > > > > > > > > > > IMCOM
> > > > > > > > > > >                                                  
> > > > > > > > > > >  command has been sent.
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164693462) simcom: tx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  mcmd ch=4 len=10  :
> > > > > > > > > > >                                                  
> > > > > > > > > > >  AT+CPSI?
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164693482) simcom: rx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  line ch=4 len=85  :
> > > > > > > > > > >                                                  
> > > > > > > > > > >  +CPSI:
> > > > > > > > > > >                                                  
> > > > > > > > > > >  WCDMA,Online,262-01,0x16C3,7824927,WCDMA
> > > > > > > > > > >                                                  
> > > > > > > > > > >  IMT
> > > > > > > > > > >                                                  
> > > > > > > > > > >  2000,454,10836,0,7.5,104,18,8,500
> > > > > > > > > > > 
> > > > > > > > > > >                                                 D
> > > > > > > > > > >                                                  
> > > > > > > > > > >  (164693482) simcom: rx
> > > > > > > > > > >                                                  
> > > > > > > > > > >  line ch=4 len=2   : OK
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 Y
> > > > > > > > > > > es. Well, no surprise,
> > > > > > > > > > >                                                 T
> > > > > > > > > > > elekom network :-).
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 T
> > > > > > > > > > > he SIM5360 is supposed
> > > > > > > > > > >                                                 t
> > > > > > > > > > > o automatically fall
> > > > > > > > > > >                                                 b
> > > > > > > > > > > ack to 2G if 3G isn't
> > > > > > > > > > >                                                 a
> > > > > > > > > > > vailable. On a quick
> > > > > > > > > > >                                                 b
> > > > > > > > > > > rowse through the
> > > > > > > > > > >                                                 m
> > > > > > > > > > > anual, I didn't find a
> > > > > > > > > > >                                                 c
> > > > > > > > > > > ommand to force 2G,
> > > > > > > > > > >                                                 j
> > > > > > > > > > > ust one to lock to a
> > > > > > > > > > >                                                 s
> > > > > > > > > > > pecific 2G cell… you
> > > > > > > > > > >                                                 c
> > > > > > > > > > > ould do that depending
> > > > > > > > > > >                                                 o
> > > > > > > > > > > n your location, but
> > > > > > > > > > >                                                 m
> > > > > > > > > > > aybe you should first
> > > > > > > > > > >                                                 i
> > > > > > > > > > > nspect your modem
> > > > > > > > > > >                                                 s
> > > > > > > > > > > tatus now.
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 R
> > > > > > > > > > > egards,
> > > > > > > > > > > 
> > > > > > > > > > >                                                 M
> > > > > > > > > > > ichael
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 A
> > > > > > > > > > > m
> > > > > > > > > > >                                                  
> > > > > > > > > > >  02.08.20 um 09:39
> > > > > > > > > > >                                                  
> > > > > > > > > > >  schrieb Chris van der
> > > > > > > > > > >                                                  
> > > > > > > > > > >  Meijden:
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > >                                                 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Hi all
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    I'm
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      trying to understand
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      some principals of
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      the SIM connection
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      methods of OVMS.
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Reason
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      is that I recently
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      moved from "the big
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      city" Munich to the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      very much rural
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      village Thalham. In
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      Thalham we have so
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      called "lite" mobile
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      transmitters. These
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      transmitters are
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      installed, as far as
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      I understood, to
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      safe money and to
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      prepare the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      transition of the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      providers to 4g /
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      5g. They are forcing
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      the frequencies
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      towards the 4g band
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      with those.
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    So these
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      transmitters seem to
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      offer only 2g and
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      4g, but no more 3g
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      (really ???).
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    I don't
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      have any network
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      connection with the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      SIM in my OVMS here
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      in Thalham. In the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      next village Zolling
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      I have connection.
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      In Zolling they
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      don't have the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      "lite" transmitters,
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      but still have full
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      3g support. The
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      antenna of my OVMS
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      is working well
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      (-100 dBm to -70
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      dBm).
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Now my
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      questions ...
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Does
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      OVMS have a fallback
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      on SIM5360 Europe to
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      2g (EDGE) if 3g is
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      not available?
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    I also
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      did some reading in
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      the modem
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      documentation and
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      tried to send some
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      AT commands. Goal is
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      to try to force the
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      SIM into 2g mode. I
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      tried i.e.
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    simcom
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      muxtx 2 AT+COPS?
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    to get
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      some information
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      from the SIM, but I
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      don't get an answer
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      on that command at
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      all. No matter what
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      channel I try. Am I
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      missing something
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      there?
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Thanx
> > > > > > > > > > > >                                                
> > > > > > > > > > > >      for input.
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Regards
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    Chris
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    
> > > > > > > > > > > >                                                
> > > > > > > > > > > >    ____________________________________________
> > > > > > > > > > > > ___
> > > > > > > > > > > > OvmsDev mailing list
> > > > > > > > > > > > OvmsDev at lists.openvehicles.com
> > > > > > > > > > > > http://lists.openvehicles.com/mailman/listinfo/
> > > > > > > > > > > > ovmsdev
> > > > > > > > > > > > 
> > > > > > > > > > > >                                                
> > > > > > > > > > > >  
> > > > > > > > > > > 
> > > > > > > > > > >                                                 
> > > > > > > > > > > 
> > > > > > > > > > >                                                 _
> > > > > > > > > > > ______________________________________________
> > > > > > > > > > > OvmsDev mailing list
> > > > > > > > > > > OvmsDev at lists.openvehicles.com
> > > > > > > > > > > http://lists.openvehicles.com/mailman/listinfo/ov
> > > > > > > > > > > msdev
> > > > > > > > > > > 
> > > > > > > > > > >                                               
> > > > > > > > > > 
> > > > > > > > > >                                             
> > > > > > > > > > _______________________________________________
> > > > > > > > > > 
> > > > > > > > > >                                             OvmsDev
> > > > > > > > > > mailing list
> > > > > > > > > > 
> > > > > > > > > >                                             OvmsDev
> > > > > > > > > > @lists.openvehicles.com
> > > > > > > > > > 
> > > > > > > > > >                                             http://
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