> On the surface, my experience contradicts Dave's statement, since I can do the serial HotSync. Double check your methods before you draw your conclusion. Take a close look at the cable you are using for your serial Hotsync.
The Clie Hotsync cable should have a line or Clie powered RS232 level converter board already in it. Open up the cable head, you should see a small board with components. You could purchase a cable and modify the connections to do what you need. Brando (shop.brando.com.hk) has some inexpensive cables. You can also check with markspace.com The Visor requires a little more since the hand held doesn't provide serial control lines. The serial cradle for the Visor requires external power for the circuitry inside. What is the voltage levels for the pulses you are working with? They may fall within the levels that may work directly (just be sure to proper isolate the signals so you don't burn out either device) You mention the device is non-powered. How are the pulses generated? You need the energy from somewhere. How is RTS being used? Does the device get the power from the control line? If so, you may need a powered RS232 line converter not a line-powered one. Either the MAX232EPN or the MAX3222CPE with 4 1uf caps and 2 AAA batteries should work. ----- Original Message ----- From: "Bill Heidler" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Tuesday, March 04, 2003 6:37 PM Subject: Re: Serial comm problem in Sony Clie (PEG-SL10). > I am building an app which uses the serial port to interface to a simple, > non-powered device > which outputs pulses at a low frequency (less than 20Hz). On the Palm Vx > and m100 that I > have done my initial development on, it works to use a serial cable which > uses only the RTS > and RXD pins. It also works to attach these two inputs to the Palm serial > HotSync cables. > > Last week, I started some "compatibility testing" and bought a Visor Deluxe > and a Clie SJ20, as > well as serial HotSync cables for each. I can't get either of them to input > the serial pulses (using > the inputs attached to the HotSync cables), even though the serial HotSync > works for both. > > After researching the Visor, I can see that I need to supply power, and am > trying to find a new cable > that will do that. > > Do I need to do the same thing for the Clie? > > On the surface, my experience contradicts Dave's statement, since I can do > the serial > HotSync. > > As always, thank you for any assistance. > > Bill Heidler > < [EMAIL PROTECTED] > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
