Since this generated a bunch of discussion I just went ahead and designed and ordered PCB's with Male/Female DB25's and a socket for the 93C46 family of EEPROM.So if someone wants one when they arrive (2-3 weeks) let me know :-) IMHO a lot cleaner than soldering an EEPROM directly inside a DB25 cable shell...
 
Steven Donegan
KK6IVC General Class FCC License
Silver State Car #86
www.sscc.us

From: Jim Duuuude <telesistant@hotmail.com>
To: Steven Donegan <donegan@donegan.org>; Steve Zingman <szingman@msgstor.com>; Bryan Fields <bryan@bryanfields.net>; app_rpt mailing list <app_rpt-users@ohnosec.org>
Sent: Sunday, November 1, 2015 8:52 PM
Subject: RE: [App_rpt-users] USB Adapter has no EEPROM installed

Again, the reason the EEPROM is not installed by default is that it REALLY should
be in the connector, so the parameters are tied to the radio/cable, not the URI (to allow
field-replaceability, etc).

Date: Mon, 2 Nov 2015 03:28:52 +0000
From: donegan@donegan.org
To: szingman@msgstor.com; Bryan@bryanfields.net; app_rpt-users@ohnosec.org
Subject: Re: [App_rpt-users] USB Adapter has no EEPROM installed



Ahh, I see the real problem - there is no unique serial number (or anything else) between URI-X's. So doing the udev.conf thing doesn't look like it will work as there is nothing unique in dmesg to lock it to...

Sounds like DMK should put a minimal EEPROM in and assign unique serial numbers - if that is a 10$ upgrade for those with multiple URI's it sounds like a decent deal.

I will check my sound fobs next...
 
Steven Donegan
KK6IVC General Class FCC License
Silver State Car #86
www.sscc.us

From: Steven Donegan <donegan@donegan.org>
To: Steve Zingman <szingman@msgstor.com>; Bryan Fields <Bryan@bryanfields.net>; APP RPT <app_rpt-users@ohnosec.org>
Sent: Sunday, November 1, 2015 7:08 PM
Subject: Re: [App_rpt-users] USB Adapter has no EEPROM installed

I have 5 USB fobs to play with and I know the udev rule tango - I'll see if there is something that lets you lock it down regardless of order. That is the case with WiFi, serial and Ethernet dongles I have worked with in the past so I see no reason (yet) why USB audio devices would be any different...
 
Steven Donegan
KK6IVC General Class FCC License
Silver State Car #86
www.sscc.us



From: Steve Zingman <szingman@msgstor.com>
To: Bryan Fields <Bryan@bryanfields.net>; APP RPT <app_rpt-users@ohnosec.org>
Sent: Sunday, November 1, 2015 4:59 PM
Subject: Re: [App_rpt-users] USB Adapter has no EEPROM installed

We should be able to control that with a udev rule.

Steve

On 11/01/2015 07:57 PM, Bryan Fields wrote:
> On 11/1/15 6:43 PM, REDBUTTON_CTRL wrote:
>> I have done this with many nodes with multiple nodes and it works all
>> the time. If you dont do this when setting up the nodes the URIs will
>> get jumbled up as its a crap shoot at boot up when the sw will detect
>> the usb devices.
> That was not the case with this box.  It did indeed randomly choose what
> device to init first.
>
> anyways, eeprom is worth the 10 bux.

--
"Anything is possible if you don't know what you are talking about."
1st Law of Logic




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