tag:blogger.com,1999:blog-2631429776292642259.post401010002401509892..comments2024-02-14T04:37:42.427+02:00Comments on What's up on aprs.fi: Kantronics KPC3+ KISS considered harmful - demonstration videos publishedHessuhttp://www.blogger.com/profile/12550787353137508264noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-2631429776292642259.post-57148748645189410742014-01-25T18:46:45.631+02:002014-01-25T18:46:45.631+02:00Please add the comment below to my earlier post - ...Please add the comment below to my earlier post - the result of my further investigations - thx !<br /><br />By default, the KPC3+ is configured for software flow control. In particular, when operating as digipeater, it is very likely that in the datastream sent to the TNC, soon or later there are frames containing 'flow control characters' sent - what will start the buffering!<br /><br />It is therefore essential to <b>completely disable</b> the software flow control, this can be done by giving following commands:<br /><br />- XFLOW OFF<br />- START $00<br />- STOP $00<br />- TRF OFF<br />- TXF OFF<br />- CONO OFF<br />- FLOW OFF<br />- XON $00<br />- XOFF $00<br /><br /> ON7EQhttps://www.blogger.com/profile/02070663718910792975noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-24197762320443745332014-01-18T00:53:28.530+02:002014-01-18T00:53:28.530+02:00Looking around the net there are many examples of ...Looking around the net there are many examples of connections between devices that short the CTS and RTS pins in serial cables. I've even seen pinouts of Byonics cables that do this. So, this may very well be the way to address this issue. Kantronics products are solid. I don't now why this wasn't an issue with the earlier KPC3 but I like my 3+ and will perform this mod. I hope APRS.fi and other hams can reconsider their impressions of this fine device.<br /><br />73 - Augie(K1AUG)taaugiehttps://www.blogger.com/profile/07966408660099978840noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-13977605796155638212013-12-01T23:27:56.403+02:002013-12-01T23:27:56.403+02:00Mni thx Matt Ackerman for the valuable tip regardi...Mni thx Matt Ackerman for the valuable tip regarding CTS/RTS. <br /><br />I am running a complex multi-frequency digipeater/Igate system interfaced by AGWPE and was facing delays after about 24hrs of operation - which forced me to reset system every day :o(<br /><br />After applying the mod with RTS/CTS, both on TNC and PC side, now running systems one week completely in-sync !<br /><br />So sure this is a mod to be considered!<br /><br />73 Jean-Jacques <b>ON7EQ</b>ON7EQhttps://www.blogger.com/profile/02070663718910792975noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-68788851993544366352013-03-30T20:31:59.242+02:002013-03-30T20:31:59.242+02:00Would like to hear the outcome of this myself. I ...Would like to hear the outcome of this myself. I will be deploying a javAPRSsrvr based digi with a KPC-3+ at some point today. I will check in here if I have a problem. Matthew Currie VE7MJCAnonymoushttps://www.blogger.com/profile/14804457512034886864noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-59943208427130672322013-01-21T20:52:25.937+02:002013-01-21T20:52:25.937+02:00Did you ever hear back from radionert if the CTS/R...Did you ever hear back from radionert if the CTS/RTS jumper works around the delay issue?Lynn (D)https://www.blogger.com/profile/13946330136544635525noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-68053612792511650972012-07-17T04:20:43.655+03:002012-07-17T04:20:43.655+03:00Matt: That's very interesting news! The explan...Matt: That's very interesting news! The explanation seems plausible - if the KPC3+ buffering is buggy, hardware handshaking could certainly trigger the bug.<br /><br />I passed on this note to radionerd who made the videos - he promised to try the trick out ASAP and confirm if it works around the problem for him!.Hessuhttps://www.blogger.com/profile/12550787353137508264noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-78694705991345693512012-07-16T20:57:44.554+03:002012-07-16T20:57:44.554+03:00I was working with Kantronics support on this issu...I was working with Kantronics support on this issue and I seem to have solved it by shorting the RTS and CTS pins together within my serial cable. (PINS 4/5 on DB25 and PINS 7/8 on DB9) I simply ran a jumper between the two. This appears to be an issue with how the APRS software and/or the AX.25 stack controls the RTS pin and shorting the RTS and CTS together prevents the software from holding the RTS pin low. If the RTS pin is at low voltage the KPC3+ will start buffering and does not get caught back up. I have been running mine for several weeks without showing this behavior again. Before I made the change it would happen after about 12 hours.Matt Ackermanhttps://www.blogger.com/profile/07288273364619867465noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-36594072314410323832012-03-16T02:36:44.706+02:002012-03-16T02:36:44.706+02:00I suspect my KAM-XL has the same problem in KISS m...I suspect my KAM-XL has the same problem in KISS mode.KL2Rhttps://www.blogger.com/profile/00780827990696387654noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-44636865503374095972011-08-06T18:19:01.473+03:002011-08-06T18:19:01.473+03:00The Kantronics Packet Controller service bulletin ...The Kantronics Packet Controller service bulletin referenced above has nothing whatsoever to do with the issue addressed in this blog. There still is no bug fix for this as of August 2011. GL es 73Unknownhttps://www.blogger.com/profile/17235220859640226179noreply@blogger.comtag:blogger.com,1999:blog-2631429776292642259.post-59125264344446165162011-06-19T09:46:21.629+03:002011-06-19T09:46:21.629+03:00And you have to pay them $40.00 for them to fix th...And you have to pay them $40.00 for them to fix the bug!!!!<br /><br />http://www.kantronics.com/support/kpcbulletin.htmlStevehttps://www.blogger.com/profile/17495229259891221809noreply@blogger.com