BS2 and mobile phones
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Posts: 46,084
All cellular phones I've seen support at commands, this is very
useful for SMS etc.
This is very useful: Imagine your stamp sending an SMS if someone
tries to break into your car....
Sometimes it's hard to get support info, I use Siemens M20T and
there is a lot of on the web, the support from siemens is very good.
Some manufacturers use their own adaption of the GSM standards which
causes compatibility errors.
It very useful and fancy.
/Douglas
--- In basicstamps@yahoogroups.com, "johan_y_andersson
<bindler@h...>" <bindler@h...> wrote:
> I use my basic stamp as an inerface between a gps and my mobile
> phone. Signaling into the stamp is normally no problem, you can
> connect the in-wire direct to the in-pin you choose. Just put a
20k
> resistor in between to get the signal right and protect the stamp.
> Signalling out from the stamp is another issue. The voltage levels
> coming from the stamp I/O pins is considerably lower than those
> standardized in the rs232 serial interface. Sometimes connecting a
> gadget directly from the stamp works, sometimes not. I had some
> problems getting the phone to react to at commands, but since size
is
> no issue in my project I finally connected the phone to the serial
> port on my demo board (the one used for programming the stamp) and
> voil
useful for SMS etc.
This is very useful: Imagine your stamp sending an SMS if someone
tries to break into your car....
Sometimes it's hard to get support info, I use Siemens M20T and
there is a lot of on the web, the support from siemens is very good.
Some manufacturers use their own adaption of the GSM standards which
causes compatibility errors.
It very useful and fancy.
/Douglas
--- In basicstamps@yahoogroups.com, "johan_y_andersson
<bindler@h...>" <bindler@h...> wrote:
> I use my basic stamp as an inerface between a gps and my mobile
> phone. Signaling into the stamp is normally no problem, you can
> connect the in-wire direct to the in-pin you choose. Just put a
20k
> resistor in between to get the signal right and protect the stamp.
> Signalling out from the stamp is another issue. The voltage levels
> coming from the stamp I/O pins is considerably lower than those
> standardized in the rs232 serial interface. Sometimes connecting a
> gadget directly from the stamp works, sometimes not. I had some
> problems getting the phone to react to at commands, but since size
is
> no issue in my project I finally connected the phone to the serial
> port on my demo board (the one used for programming the stamp) and
> voil
Comments
GSM, and in the US, the market share and coverage by GSM carriers (e.g.
T-Mobile and Cingular) is much less than the archaic but prevalent U.S. only
standards.
If you live in the U.S. and want to have access to reasonably good cellular
data communication, by using a cellular modem that is integrated into your
cell phone, you really have to switch to a GSM carrier. The rest of the
U.S. carriers are just tooooooo hard to interface.
I use a Nokia 8290 on T-Mobile and have good SMS as well as an IR port on
the phone for making the connection to my Palm or my laptop. Painless setup
and very reliable.
After moving the SIM card to a Motorola tri-band phone (also with IR port),
I was also able to use the same telephone number while traveling throughout
Europe, and everyone could call me at my U.S. number.
-- end of soapbox --
Original Message
From: Douglas Rydstroem <rdo@s...> [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=hUcmuBURyoDy5x7_MsXgeAgLiB6XycNs5H9BPvWhb2jmuthAyRd6o3W13ZIqB3p4zyRLQtE]rdo@s...[/url
Sent: Wednesday, January 22, 2003 3:45 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re:BS2 and mobile phones
All cellular phones I've seen support at commands, this is very
useful for SMS etc.
This is very useful: Imagine your stamp sending an SMS if someone
tries to break into your car....
Sometimes it's hard to get support info, I use Siemens M20T and
there is a lot of on the web, the support from siemens is very good.
Some manufacturers use their own adaption of the GSM standards which
causes compatibility errors.
It very useful and fancy.
/Douglas
--- In basicstamps@yahoogroups.com, "johan_y_andersson
<bindler@h...>" <bindler@h...> wrote:
> I use my basic stamp as an inerface between a gps and my mobile
> phone. Signaling into the stamp is normally no problem, you can
> connect the in-wire direct to the in-pin you choose. Just put a
20k
> resistor in between to get the signal right and protect the stamp.
> Signalling out from the stamp is another issue. The voltage levels
> coming from the stamp I/O pins is considerably lower than those
> standardized in the rs232 serial interface. Sometimes connecting a
> gadget directly from the stamp works, sometimes not. I had some
> problems getting the phone to react to at commands, but since size
is
> no issue in my project I finally connected the phone to the serial
> port on my demo board (the one used for programming the stamp) and
> voil
I also had connected my Garmin eTrex GPS receiver to BOE, and it works
properly, I had even extracted the $GPGLL string from among the NMEA data flow
from the receiver and edit the string using DEBUG window. The resistor is used
to sink the current so that it works in safe range of BS2.
So,wiring mobile phone to BS2 is possible, I am using Board of
Education(BOE) and its programming port is only used to download program( Could
I use it to connect to mobile phone via data cable? ).
Thus, if I want to enable a serial communication betweem BS2 and mobile
phone, what I need to do is to either wire the phone to the I/O ports of BOE or
wire to the Serial In and Serial Out of the BS2-IC module. Since I am using BOE,
could you give me some hints on how to connect the phone BOE? Should I use RS1?I
would much more appreciating!
The wire from the phone could be plugged directly into the Serial in
and Serial Out on the stamp , but then I probably have to bridge some of the
wires in the serial cable,depends on kind of phone I am using. I am using siemen
S35 and I really need information about wires that should be bridged from my
phone...
Days ago I cracked the cover of both the head and tail of my siemens
data cable and I discovered that 3 pins(TxD, RxD and GRND) out of 12 pins from
the phone charging place are used to connected to a MAX231 chip before it
reaches DB9 connector. Should I connect the 3 pins directly to I/O ports of BOE
or from the DB9 connector that is after the MAX231 chip?
"Douglas Rydstroem <rdo@s...>" <rdo@s...> wrote:All cellular phones
I've seen support at commands, this is very
useful for SMS etc.
This is very useful: Imagine your stamp sending an SMS if someone
tries to break into your car....
Sometimes it's hard to get support info, I use Siemens M20T and
there is a lot of on the web, the support from siemens is very good.
Some manufacturers use their own adaption of the GSM standards which
causes compatibility errors.
It very useful and fancy.
/Douglas
--- In basicstamps@yahoogroups.com, "johan_y_andersson
" wrote:
> I use my basic stamp as an inerface between a gps and my mobile
> phone. Signaling into the stamp is normally no problem, you can
> connect the in-wire direct to the in-pin you choose. Just put a
20k
> resistor in between to get the signal right and protect the stamp.
> Signalling out from the stamp is another issue. The voltage levels
> coming from the stamp I/O pins is considerably lower than those
> standardized in the rs232 serial interface. Sometimes connecting a
> gadget directly from the stamp works, sometimes not. I had some
> problems getting the phone to react to at commands, but since size
is
> no issue in my project I finally connected the phone to the serial
> port on my demo board (the one used for programming the stamp) and
> voil
I'd use the max231 chip.
Look at http://www.emesys.com/BS2rs232.htm , this is what I think
you need to know...
good luck!
/Douglas
--- In basicstamps@yahoogroups.com, choi jolin <jolincsy@y...> wrote:
>
> I am so delighted with the information provided by you all and
thanks a lot!
> I also had connected my Garmin eTrex GPS receiver to
BOE, and it works properly, I had even extracted the $GPGLL string
from among the NMEA data flow from the receiver and edit the string
using DEBUG window. The resistor is used to sink the current so that
it works in safe range of BS2.
> So,wiring mobile phone to BS2 is possible, I am using
Board of Education(BOE) and its programming port is only used to
download program( Could I use it to connect to mobile phone via data
cable? ).
> Thus, if I want to enable a serial communication betweem
BS2 and mobile phone, what I need to do is to either wire the phone
to the I/O ports of BOE or wire to the Serial In and Serial Out of
the BS2-IC module. Since I am using BOE, could you give me some
hints on how to connect the phone BOE? Should I use RS1?I would much
more appreciating!
> The wire from the phone could be plugged directly into
the Serial in and Serial Out on the stamp , but then I probably have
to bridge some of the wires in the serial cable,depends on kind of
phone I am using. I am using siemen S35 and I really need
information about wires that should be bridged from my phone...
> Days ago I cracked the cover of both the head and tail of
my siemens data cable and I discovered that 3 pins(TxD, RxD and
GRND) out of 12 pins from the phone charging place are used to
connected to a MAX231 chip before it reaches DB9 connector. Should I
connect the 3 pins directly to I/O ports of BOE or from the DB9
connector that is after the MAX231 chip?
> "Douglas Rydstroem <rdo@s...>" <rdo@s...> wrote:All cellular
phones I've seen support at commands, this is very
> useful for SMS etc.
> This is very useful: Imagine your stamp sending an SMS if someone
> tries to break into your car....
>
> Sometimes it's hard to get support info, I use Siemens M20T and
> there is a lot of on the web, the support from siemens is very
good.
> Some manufacturers use their own adaption of the GSM standards
which
> causes compatibility errors.
>
> It very useful and fancy.
>
> /Douglas
>
> --- In basicstamps@yahoogroups.com, "johan_y_andersson
> " wrote:
> > I use my basic stamp as an inerface between a gps and my mobile
> > phone. Signaling into the stamp is normally no problem, you can
> > connect the in-wire direct to the in-pin you choose. Just put a
> 20k
> > resistor in between to get the signal right and protect the
stamp.
> > Signalling out from the stamp is another issue. The voltage
levels
> > coming from the stamp I/O pins is considerably lower than those
> > standardized in the rs232 serial interface. Sometimes connecting
a
> > gadget directly from the stamp works, sometimes not. I had some
> > problems getting the phone to react to at commands, but since
size
> is
> > no issue in my project I finally connected the phone to the
serial
> > port on my demo board (the one used for programming the stamp)
and
> > voil
M20T is a kind of GSM modem, is it?
I had actually gone through about MAX231 after I had cracked the data cable
and it need 2 power supply . Will the 12V ruin the Stamp? Any cautions?
May i know if you wired the pin no. 6@9 (Rx) and 7@8 (Tx) of MAX231 to the sin
and sout of Stamp respectively?
With Yahoo! Mail you can get a bigger mailbox -- choose a size that fits your
needs
[noparse][[/noparse]Non-text portions of this message have been removed]
(incl max-chips) so I don't know how You would use it if it was in a
cable....
On my M20T is a 9 pin serial port, all I use is a pin to pin
extension cable.
You may have to xwire the flow control (RTS-CTS, DSR-DTR) and use no
more than 2400 bps, higher baudrates are not reliable, not for the
phone, nor the stamp.
There is a lot of settings to do with 'at'-commands before you can
use it for modem purposes, a lot of docs and reading is required,
all docs is supplied by each manufacturer...
The M20T docs are in total 2Mb, I'll mail them if You want to....
/Douglas
--- In basicstamps@yahoogroups.com, choi jolin <jolincsy@y...> wrote:
>
> Thanks a lot for your information.
>
> M20T is a kind of GSM modem, is it?
>
> I had actually gone through about MAX231 after I had cracked the
data cable and it need 2 power supply . Will the 12V ruin the Stamp?
Any cautions?
>
> May i know if you wired the pin no. 6@9 (Rx) and 7@8 (Tx) of
MAX231 to the sin and sout of Stamp respectively?
>
>
>
>
>
> With Yahoo! Mail you can get a bigger mailbox -- choose a size
that fits your needs
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
"Douglas Rydstroem <rdo@s...>" <rdo@s...> wrote:The M20T is a GSM
modem, thats right. It contains all the hardware
(incl max-chips) so I don't know how You would use it if it was in a
cable....
On my M20T is a 9 pin serial port, all I use is a pin to pin
extension cable.
You may have to xwire the flow control (RTS-CTS, DSR-DTR) and use no
more than 2400 bps, higher baudrates are not reliable, not for the
phone, nor the stamp.
There is a lot of settings to do with 'at'-commands before you can
use it for modem purposes, a lot of docs and reading is required,
all docs is supplied by each manufacturer...
The M20T docs are in total 2Mb, I'll mail them if You want to....
/Douglas
--- In basicstamps@yahoogroups.com, choi jolin wrote:
>
> Thanks a lot for your information.
>
> M20T is a kind of GSM modem, is it?
>
> I had actually gone through about MAX231 after I had cracked the
data cable and it need 2 power supply . Will the 12V ruin the Stamp?
Any cautions?
>
> May i know if you wired the pin no. 6@9 (Rx) and 7@8 (Tx) of
MAX231 to the sin and sout of Stamp respectively?
>
>
>
>
>
> With Yahoo! Mail you can get a bigger mailbox -- choose a size
that fits your needs
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
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