[tech] Door lock

Andrew Adamson bob at ucc.gu.uwa.edu.au
Sun Mar 11 22:20:53 WST 2012


Hi All,

The modem has now been replaced with the arduino and the small 5v relay 
board. It's working for now, but it's a hack and not even properly boxed 
up. [TPG] has already modified dispense to suit it. If it breaks, I'll let 
you keep the pieces.

For posterity, here are the super-sekret settings and commands: 

Serial over USB connected to merlo, 115200 8n1
Type "2;" and it will respond with "1,The UCC door is alive;"
Type "4;" and it will respond with "1,Opening door;" , keep the lock open 
for ten seconds and then say "1,Locking door;". The command codes are 
strange numbers because I hacked the CmdMessenger [1] library example to 
do the job.

I've found using picocom to check it is easier than minicom. The following 
command* will start picocom with the correct baud rate and a command 
character of x: `picocom /dev/ttyUSB0 -e x -b 115200'

Andrew Adamson
UCC President
bob at ucc.asn.au

[1] http://arduino.cc/playground/Code/CmdMessenger
* merlo is only open to wheel members

|"The faster you move, the slower time passes, the longer you live."     |
| ---Peter's Laws                                                        |

On Wed, 7 Mar 2012, Andrew Adamson wrote:

> *sigh*
> 
> So I got back from the pub and went to close the clubroom, and guess what 
> wasn't working? I've turned the modem off, since it is obviously the 
> problem and was causing the lock to heat up. I bought a little 5V relay 
> board at altronics today [1], which could be combined with the Seeeduino 
> in the machine room to replace the modem system. Unfortunately I won't be 
> at uni for the next two days, so if someone wants to work on that, just 
> let us know on the list.
> 
> [1] http://www.altronics.com.au/index.asp?area=item&id=S4440
> 
> Andrew Adamson
> UCC President
> bob at ucc.asn.au
> 
> |"The faster you move, the slower time passes, the longer you live."     |
> | ---Peter's Laws                                                        |
> 
> On Wed, 7 Mar 2012, Andrew Adamson wrote:
> 
> > The door is now back online. The in-wall wiring has been redone, and the 
> > power supply has been replaced with something smaller now that we need 
> > less current. We are still using the modem, so if the system breaks in the 
> > next couple of days we know exactly what is wrong.
> > 
> > Please note: you no longer need to bang/kick on the door to open or close 
> > it.
> > 
> > Andrew Adamson
> > UCC President
> > bob at ucc.asn.au
> > 
> > |"The faster you move, the slower time passes, the longer you live."     |
> > | ---Peter's Laws                                                        |
> > 
> > On Tue, 6 Mar 2012, Andrew Adamson wrote:
> > 
> > > Hi all,
> > > 
> > > I spent some time today replacing our old electronic lock with a newish 
> > > one which has been sitting in the tool cupboard for a couple of years. 
> > > It's not wired up as yet so you will still need to use the key for now. In 
> > > the next day or so I plan to redo the wiring back to the machine room, at 
> > > which point the door modem may or may not get replaced with an arduino or 
> > > analogue circuit. There is no longer any need to slam the door to make it 
> > > close, and the lock even closes itself now. Enjoy! :-)
> > > 
> > > Andrew Adamson
> > > UCC President
> > > bob at ucc.asn.au
> > > 
> > > |"The faster you move, the slower time passes, the longer you live."     |
> > > | ---Peter's Laws                                                        |
> > > 
> > 
> 


More information about the tech mailing list