[Rack] doorport - do you know how the door opener works?
froggytoad at gmail.com
Tue Dec 6 02:58:01 PST 2011
hi its totes cold and sketchy on geary.
Hang with me email buddies.
On Dec 6, 2011 2:21 AM, "Jake" <jake at spaz.org> wrote:
> There is no need for an ethernet-powered arduino or another pc, because
now the door is connected to a usb parallel port on minotaur.
> I promise there will be no complications or electrical nasties related to
the long wires.
> please put any info or code you have on the wiki page so it's more easy
to collaborate on this thing. Also miloh says to ask you for access to
stallion or minotaur or whatever. i think i'm already on pony. I want
someone to test stuff.
jake find that wyse box in the rack room and use its parport. it will work
without a monitor and it will be reliable. No one reads this list anyways.
> On Tue, 6 Dec 2011, Jonathan Lassoff wrote:
>> I'm a bit familiar with the situation with the hardware, and AFAIK Miloh
>> Mike Kan have also worked on the hardware. I've been playing with various
>> ideas for software for opening the door lately and have a little C daemon
>> for x86/BIOS PCs as well as an Arduino sketch that implement a simple
>> UDP-based protocol to see if anyone has been ringing the door recently
>> to buzz open the gate.
>> SuperQ is in the process of getting an Arduino that can be powered by
>> 802.3af -over-Ethernet. My hope is that once this hardware is in-hand, we
>> can mount it by the door and run some Ethernet from the closet there to
>> stair-top door to power it.
>> Thanks for hooking the door up to Minotaur! That's a much more stable
>> machine than the one in the touchpanel by the door. I'll see about
>> the daemon running on there to test with.
>> I wonder what's on the other side of the wire though (within the buzzer
>> panel or intercom/buzzer controller). I wonder if our hacked-in
>> the wire causes impedance mismatches, high-current paths, or other
>> electrical nasties that might interfere with its proper operation.
>> On Tue, Dec 6, 2011 at 1:47 AM, Jake <jake at spaz.org> wrote:
>> Who knows how the door opener script works? The door opener
>> is now effectively plugged into Minotaur, the computer screwed
>> to the wall
>> over the "server room" door. Make it work somehow.
>> This page is here to store information about the parallel port /
>> opener thingy that allows noisebridgers to open the door from a
>> jake (spaz) made a 30 foot (approximately) cable which has a
>> centronics-36 socket (like on an old printer) on one end, and a
>> DB-25 socket on the other end. It is a cat5 wire which has eight
>> conductors, and is passing through two ground wires (to pins 19
>> and 20 on
>> the DB25) and three each of input and output pins. These include
>> pins 6
>> and 7 (bits 4 and 5 of the parallel data byte), and pin 16 (an
>> output pin
>> which is pin 31 on the centronics connector). The three input
>> pins are 10,
>> 12 and 13 (none of which are inverted in the implementation).
>> Pins 6 and
>> 10 are the only ones wired up right now on the little
>> optoisolator board
>> (along with ground on pin 20).
>> This is plugged into a USB parallel port cable (made for using
>> printers) which is plugged into Minotaur, the
I give up on delete
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