After a few hours or hacking the old Red Roomba, and failing to fix or workaround the cliff hanger sensor it was time to get some success.

Elmood went out and got me a ULN2803AP chip, which I could use to glue together the Arduino and the tri colour LED bar. I then used some of the arduino examples to pulse and colour and mess around a bit.

The next step, perhaps using I2C to control individual bars (I have 10) and line them up on the stairway!

LED Sign from hypatia on Vimeo.

moar LED sign awesomeness from hypatia on Vimeo.

Download the video

I got some strange IM from someone. Halfway through  I figure out we’ve
been setup somehow with a relay in the middle and both of us see the
other as some other identity. When the person says he is using adium, I
thought it was a perfect chance to fire up OTR to see what would happen
with this MITM scenario….  Funny enough, it revealed the identity of
the other user to me :)

(My AIM identity is letoams)

(06:17:38 PM) SensitiveCoho: Hey.
(06:18:16 PM) letoams: bot?
(06:18:36 PM) SensitiveCoho: are you a bot?
(06:18:53 PM) letoams: are you are you are you a bot?
(06:19:14 PM) SensitiveCoho: no
(06:19:17 PM) SensitiveCoho: i’m human
(06:19:28 PM) letoams: ok then
(06:19:57 PM) SensitiveCoho: who are you?
(06:20:13 PM) letoams: if you dont know why are you talking to me?
(06:20:26 PM) SensitiveCoho: i want to know why you’re talking to me
(06:20:48 PM) letoams: you started?
(06:20:52 PM) letoams: (06:17:38 PM) SensitiveCoho: Hey.
(06:21:12 PM) SensitiveCoho: i’m not SensitiveCoho
(06:21:30 PM) letoams: that’s what i see
(06:21:31 PM) SensitiveCoho: embarrassedcoho
6:17

Hi!
(06:21:40 PM) SensitiveCoho: i see you as “embarrassedcoho”
(06:21:48 PM) letoams: that’s not my name :)
(06:22:00 PM) letoams: funny. must be some bot connecting two random im
identities
(06:22:06 PM) SensitiveCoho: maybe
(06:22:20 PM) SensitiveCoho: you on mac/pc?
(06:22:27 PM) letoams: linux
(06:22:32 PM) SensitiveCoho: i’m on mac
(06:22:33 PM) letoams: not infected here :P
(06:22:37 PM) SensitiveCoho: using adium
(06:22:57 PM) SensitiveCoho: adium’s been weird today … bugging me that yahoo
messenger network is down for mainenance
(06:23:00 PM) letoams: really? let’s try otr then. that would defeat a man in
the middle attack
(06:23:02 PM) SensitiveCoho: it just keeps telling me this over and over
(06:23:03 PM) Attempting to start a private conversation with SensitiveCoho…
(06:23:12 PM) SensitiveCoho: otr?
(06:23:14 PM) sensitivecoho has not been authenticated yet.  You should
authenticate this buddy.
[Image] (06:23:14 PM) Unverified conversation with SensitiveCoho started.
(06:23:26 PM) The following message received from sensitivecoho was not
encrypted: [error]
(06:23:29 PM) The following message received from sensitivecoho was not
encrypted: [hmm]
(06:23:30 PM) letoams: its privacy crypto built into adium and pidgin
(06:23:33 PM) OTR Error: You sent encrypted data to logicbus, who wasn’t
expecting it.
(06:23:45 PM) Successfully refreshed the unverified conversation with
SensitiveCoho.
(06:23:45 PM) The last message to sensitivecoho was resent.
(06:23:47 PM) letoams: haha
(06:23:47 PM) The following message received from sensitivecoho was not
encrypted: [could this be due to a compromised password?]
[Image] (06:23:53 PM) Private conversation with SensitiveCoho lost.
(06:23:56 PM) OTR Error: You sent encrypted data to logicbus, who wasn’t
expecting it.
(06:23:59 PM) SensitiveCoho: i can’t read what you’re saying
(06:24:02 PM) OTR Error: You sent encrypted data to logicbus, who wasn’t
expecting it.
(06:24:03 PM) letoams: awesome. the MITM does otr too
(06:24:20 PM) sensitivecoho is contacting you from an unrecognized computer.
You should authenticate this buddy.
[Image] (06:24:21 PM) Unverified conversation with SensitiveCoho started.
(06:24:23 PM) The following message received from sensitivecoho was not
encrypted: [i read that]
[Image] (06:24:29 PM) Private conversation with SensitiveCoho lost.
(06:24:38 PM) SensitiveCoho: very strange
(06:24:40 PM) letoams: i think we blew up the mitm thing.
(06:25:06 PM) letoams: you know anyone in Toronto?
(06:29:13 PM) The encrypted message received from sensitivecoho is unreadable,
as you are not currently communicating privately.
[Image] (06:29:34 PM) Unverified conversation with SensitiveCoho started.
[Image] (06:29:34 PM) Unverified conversation with SensitiveCoho started.
[Image] (06:32:21 PM) Private conversation with SensitiveCoho lost.
(06:32:27 PM) letoams: is your handle logicbus ?
(06:32:41 PM) The encrypted message received from sensitivecoho is unreadable,
as you are not currently communicating privately.
(06:33:02 PM) SensitiveCoho: how did you figure that out
(06:33:11 PM) letoams: (06:23:33 PM) OTR Error: You sent encrypted data to
logicbus, who wasn’t expecting it.
(06:33:15 PM) letoams: otr told me
(06:33:26 PM) SensitiveCoho: hmm
(06:33:34 PM) SensitiveCoho: i just see “embarrassedcoho” for those msgs
(06:33:44 PM) SensitiveCoho: i suppose that could be a client thing
(06:33:49 PM) SensitiveCoho: i guess you have an advantage over me
(06:34:08 PM) letoams: still curious what is going on here. (my AIM is letoams)
(06:34:16 PM) SensitiveCoho: yeah
(06:34:41 PM) SensitiveCoho: i googled embarrassedcoho
(06:34:48 PM) SensitiveCoho: didn’t come up with anything helpful
(06:35:42 PM) letoams: me neither
(06:36:22 PM) letoams: anyway. gotta go. have a nice life :)
(06:36:35 PM) SensitiveCoho: peace

Anyone what this double-blind bot MITM thing is? Someone’s research project?

Testing 01 10 11?