Ok, the connection to mobile phones is a very special issue, because most of
the phones do not provide standardised levels on their serial interface.
Sometimes a special adaptor is needed to pump up the levels, which is fed
from the PC interface, assuming that this is providing the full levels.
If I understood right, as soon as the SER-001 is installed you cannot
receive data from your mobile anymore? But without SER-001 and with Dongle
you can?
The one and only Explanation I have is that the signal level provided from
the phone is not sufficient. I do not know how Mr. PCB man solved the
problem, but the driver outputs of both interface drivers (from the built in
and the SER-001) towards the Newts internal serial port must be switched in
parallel.
Maybe the combination of both, low signal levels ad switching both line
drivers in parallel might cause the problem in your case.
Cheers
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Dave Christensen
> Sent: Wednesday, November 27, 2002 5:23 PM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] ANN: SER-001
> To correct the no problems reported to dat comment.
> I experienced problems with the SER-001 and 2 Motorola Cell
> Phones. Data would be transmitted to the phone, it would
> dial and connect, but for some reason the newton would not
> realize that it was connected. It just sat there and timed
> out. Probably something to do with the CD line not being
> fully processed somewhere. Long story short, I use my cell
> phone with my newt every two-three days, and couldnt go and
> keep plugging the SER001 in and out all the time as not even
> a dongle based connection would work properly with the phone
> when the card was installed. My keyboard worked fine with
> the SER001 as did a HP DeskJet 870. Mr. PCBMan went way out
> of his way in helping to troubleshoot and trying to get it
> to work, but no dice. I'd love to have kept mine, and had
> it work, but I guess I cant have everything.
>
> Anyone have a dongle or two CHEAP to sell?
>
> -Dave
> New River, Arizona
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