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projets:fuz:operame

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Operame

Project information

  • Owner: Lomanic
  • Participants: you?
  • Status: proof of concept
  • Project created on Sun 14-11-21 by Lomanic

Goals

  • Implement Operame, a project from the Dutch hackerspace Revspace using a CO2 sensor coupled to a TTGO T-Display to tell people in a room that they should open the windows to limit Covid-19 aerial spread indoors
  • Document it in English
  • Maybe extend it in some way (automatic VAC system?)

Hardware

As I won't order PCBs online (and specific SMD sockets as shown in soldering instructions video) and just use what I have at hand, it will be assembled on a perfboard I had in my drawer for years.

TTGO T-Display pinout, mirrored from https://github.com/Xinyuan-LilyGO/TTGO-T-Display

Pinout:

TTGO T-Display      MH-Z19C
   5V                 VCC
   GND                GND
   D26                RX
   D27                TX

D12 on the TTGO has to be grounded but it's not obvious why

Software

https://github.com/revspace/operame unmodified, had to install vscode (vscodium doesn't have platformio in its openvsx store) and the appropriate driver on Windows so platformio could flash the TTGO T-Display onboard ESP32

In action

The Operame device is shown mounted on temporary breadboards with bridges made of Dupont wires as a proof of concept

Log

2021-11-14

Initial proof of concept with breadboard, everything works perfectly.

Planned

  • put this on a perfboard, for once!
  • deploy it somewhere? (at Fuz or at Lomanic's office)
  • automatic VAC system (if at Fuz)?
projets/fuz/operame.1636900523.txt.gz · Last modified: 2023-02-02 22:06 (external edit)