[tech] Snack, lpr, webcams... (was a particularly unuseful subject, Re: [hwc] hwc Digest, Vol 83, Issue 1)
zanchey at ucc.gu.uwa.edu.au
Wed Nov 7 19:02:15 WST 2007
On Thu, 1 Nov 2007, Nick Bannon wrote:
> Things to fix:
> * Snack machine reliability
OK, I think I've fixed this.
There was a hypothesis that Xen couldn't handle high-volume serial
traffic, so I used the serial line on Mermaid (Xen Dom0) for a while and
sent large amounts of data through (strings /dev/urandom > /dev/ttyS1
&c.) but couldn't see any problems.
In any case, I switched the vending machine from a serial connection to
LAT (on port 6 on centipede, the DECserver in the machine room rack).
It's not perfect - the keypress-display reaction is now noticeably slower
- and I only waited about 20 minutes to see if it stopped working: needs
probably 24 hours or so for a definitive "it works".
([DAG]: I had to bump LAT_VERSION in LATClient.py.)
This should at least mean door group can stop rapelling into the clubroom.
UCC Wheel Member
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