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The purpose of the SCADA system at 2169 Mission is to provide intelligent monitoring and control of devices in our space. The system has two halves: critical and non-critical.

  • Critical: this system is for monitoring and controlling things which could result in a loss of money and/or property if the system fails. Example: fire and flood alarms.
  • Non-critical: this system is for everything else. Example: lights, room reservations, intercoms.


Name Critical? Description
Power No Outlet and light control, power metering, smart breakers.
Safety Yes Fire and flood alarms.
Communications No Message routing from IRC, opt-in bluetooth presence detectors.
Security Yes Theft alarms for tagged items.
HVAC No Heating and cooling controls, zone controls.



I/O Linc - INSTEON Leak / Flood Sensor Kit: $65 PIR sensors: $40ish each


1x: INSTEON PLM: $70

3x dimmers: $40ish

10x HMI panels: custom manufactured, $50 each

PCs: donated

Industrial controller: donated

Control Panels[edit]

The human interface to the SCADA services will 17" touch panels with audio output. 10 panels were sourced from Andover CG on 3rd street, which is selling their inventory of ~300 for about $60 each.

The panels will be driven by repurposed PCs we have lying around running a custom daemon to drive the framebuffer. The OS will be embedded Linux.

City of SF Requirements[edit]

Anything involving the elevator panel needs to go through the city. To find out who can answer your question, talk to the TSD:

The elevator conveyance ID is #026140. Although Henry Ho has agreed in writing to our intent to modify the elevator, the city and state both need to approve the changes. If we pay anyone to fix the elevator it's generally quite expensive and requires specially certified labor, so that's plan B. Plan A is to do it ourselves.

To do this, the changes have to comply with a web of regulations which are not passed by the state legislative branch but rather by a regulatory approval process and the governor. At the heart of the regulation web is the California Code of Regulations Title 24 (CCR 24), which is NOT a public work because it contains copyrighted code sections from model code companies. However, the relevant subparts of Title 24 (11b) are available here:

Title 8 also has many other requirements:

Several subparts reference ASME A.17, the elevator standard published by the American Society for Mechanical Engineering. This standard is also copyrighted and not available online.

ASME A.17 itself references several other standards such as IEEE and Bell System standards.

Once the work is done, this triggers a modernization inspection because the elevator has been significantly changed as part of work done to the building. This will probably be done by either Jennifer Stafford, the acting senior engineer at California DOSH ERT's Oakland office, or Deborah Tudor, the principal engineer in the San Jose district office.

A modernization inspection will require that we file a document called a "letter of intent" with DOSH ERT:


The panels will have unique numeric identifiers. The current assignments are in flux until the walls get figured out.

HMI Requirements[edit]

Global Requirements[edit]

All slides related to critical services shall be in English, Spanish, and Mandarin.


  • Evacuation mode: in this mode, the panels will display the evacuation map and both audio and visual indicators showing which direction to go.