Simple smoke detector that will beep in a pattern until a button is pressed (which will snooze it for 5 minutes) or timeout occurs.
The main usage idea is to detect cigarette smoke and alert the user to close the window manually when it happens.
It uses Arduino Uno R3 as the logic board.
Electronics schematic can be viewed using Autodesk Eagle (open the schematic.sch file).
The rendered png file is available as schematic.png and visible below.
MQ2 smoke/gas detector with digital output adaptation is used as a sensor.
flowchart TD
A[Start] --> B{Is smoke detected?}
B -->|Yes| C[Buzz + blink]
B -->|No| B
C --> D{Was button pressed?}
D -->|Yes| E[Quiet down]
D -->|No| F[Have 5 seconds passed since detection?]
F -->|Yes| E
F -->|No| C
E --> G[Sleep 5 minutes]
G --> B
It uses the Arduino flavoured C++ under the hood and needs arduino-cli to work.
Rust caused problems during compilation and I don't have time to fix these :/
Run make to build and make install to flash the binary to a device.
This requires the Arduino to be present as /dev/ttyACM0
This project makes use of:
- Adafruit-Eagle-Library for Arduino Uno R3
- Eagle-Libraries project for the buzzer schematic
- Eagle-Libraries project for the tactile switch schematic