[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
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> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > _
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> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > _______________________________________________
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> > > > > > > > > > OvmsDev
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