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Revision as of 17:17, 30 December 2015 by Kraptv (talk | contribs) (Added TODO items)
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Hackspace Unknown.png
Sub-category Systems
Status Good working order
Consumables Unknown
Accessories Unknown
Training requirement Unknown
Training link Unknown
ACnode No
Owner LHS
Origin Aden
Location Above the front-door 'space'

Hamming is an x86-processor based VIA EPIA based system donated by User:Aden. It is old and was once doorbot. It ideally could be replaced with a modern Raspberry Pi 2 or Beaglebone Black.

It is running the daemons for the Notification Board, Orange LED Strip Moving Sign and National Rail clock - these are all connected to a powered USB hub.

It's also connected to some speakers so it can do the doorbot-sounds (historically GLaDOS voices) as well but this has been broken and out of use for a long time.

Hamming has 2 x hard drives in RAID1 - it has had the 'ticking drive sound of death' so this is likely a very good thing.

Useful note for crashes / restarts etc - run

 export AUDIODEV=hw:0,0

before rebooting or PulseAudio won't work.


Yvan was kind enough to purchase a Raspberry Pi 2 as a replacement for Hamming. It is running Ubuntu MATE (a nice prepackaged spin) and we installed almost all of the same packages from Hamming onto Hamming-Replacement.

We're hoping to use a PoE power adapter for remote power management of Hamming-Replacement but retain the powered USB hub for the various serial devices. This will be a much more flexible, power efficient system with less moving parts.


  • Add in the Mini-PDU switchoff scripts for power-conservation (and make the script non-working directory dependent)
  # switch the lobbypdu port 1 off
  50 23 * * * cd ~jasper/lobbypdu ; ./
  # and back on again
  30 8  * * * cd ~jasper/lobbypdu ; ./
  • Copy host ssh keys from hamming to hamming-replacement to prevent auto-login errors
  • Verify scripts are working with new RPi2 (Orange LED, etc)
  • Verify remote logins work for existing users (copy ssh keys/homedirs)
  • If everything is going well, change IP address/hostname of hamming-replacement to hamming (after hamming is set to DHCP as hamming-legacy?)
  • Reboot both a couple of times, test out whether the moving signs work as previously intended, and then update all involved (wiki documentation, etc.)
  • Wait a period of time after replacement, DBAN the hard drives, and then offer the hardware up for member projects