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CO2 Buddy

Made by Infineon Technologies

About the project

This device helps your mind to stay awake

Project info

Difficulty: Easy

Platforms: Infineon, Seeed Studio

Estimated time: 1 hour

License: MIT license (MIT)

Items used in this project

Hardware components

	LED Ring 5V RGB WS2812B 12LED 50mm	x 1
	Seeed Studio Seeeduino XIAO (Pre-Soldered)	x 1
	Infineon S2GO PAS CO2	x 1

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

	3D Printer (generic)	x 1
	Soldering iron (generic)	x 1

Story

In the club - you have your wingman.In the gym - you have your gym buddy.To stay productive - you have your CO2 buddy!

This little device shows you when its time to open the windows based on the current CO2 level.

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Ready - set - print!

Print the attached

CO2 Buddy base (black)Which will hold all the electronic components

Layout showing positions for the CO2 Shield2Go and XIAO controller

Layout showing positions for the CO2 Shield2Go and XIAO controller

CO2 Buddy housing (black)
CO2 Buddy top (black)
CO2 Buddy ring (transparent)Which will assemble to the cover which can be stacked on top of the base

all glued cover

all glued cover

Electronics

This project is as simple as it can be. Glue the three components on each position given by the "CO2 Buddy base" and connect them according to the schematic below.

red - 5V
black - GND
yellow - I2C SCL
green - I2C DATA
blue - NEOPIXEL DATA

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Software

The Arduino code below will fade from green (800ppm) over yellow (1400ppm) to red (2000ppm) and send the current CO2 value on a Serial COM port (9600baud) every 5sec.

Schematics, diagrams and documents

CO2 schematics

CAD, enclosures and custom parts

CO2 Buddy base

base holding the electronic components

Go to download

CO2 Buddy ring

transparent ring

Go to download

CO2 Buddy top

top part of the housing

Go to download

CO2 Buddy housing

Housing of the CO2 Buddy

Go to download

Code

PAS CO2 sensor library

CO2 Buddy

Arduino code of the project

#include <Arduino.h> #include <pas-co2-ino.hpp> #include <Adafruit_NeoPixel.h> /* * The sensor supports 100KHz and 400KHz. * You hardware setup and pull-ups value will * also influence the i2c operation. You can * change this value to 100000 in case of * communication issues. */ #define I2C_FREQ_HZ 400000 #define PIN 6 #define NUMPIXELS 12 Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); /** * Create CO2 object. Unless otherwise specified, * using the Wire interface */ PASCO2Ino cotwo; int16_t co2ppm; void setup() { Serial.begin(9600); Serial.println("serial initialized"); /* Initialize the i2c interface used by the sensor */ Wire.begin(); Wire.setClock(I2C_FREQ_HZ); /* Initialize the LED ring */ pixels.begin(); // Initialize NeoPixel object pixels.fill(pixels.Color(255,255,255), 0, 12); pixels.setBrightness(5); pixels.show(); /* Initialize the sensor */ cotwo.begin(); } void loop() { /* Trigger a one shot measurement */ cotwo.startMeasure(); /* getCO2() is called until the value is available. * getCO2() returns 0 when no measurement result is yet available or an error hasoccurred. */ do {cotwo.getCO2(co2ppm);} while (0 == co2ppm); Serial.print("co2 ppm value : "); Serial.println(co2ppm); pixels.fill(pixels.Color(constrain(map(co2ppm, 800, 1400, 0, 255),0,255),constrain(map(co2ppm, 1400, 2000, 255, 0),0,255),0), 0, 12); pixels.show(); delay(5000); }

Adarfuit Neopixel library

Credits

Infineon Technologies

Our semiconductor and system solutions contribute to a better future – making our world easier, safer and greener.

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CO2 Buddy

About the project

Project info