CO2 Monitoring with K30 Sensor

Arduino UNO

Arduino kit 1: K30, connection wires.

Breadboard (generic)

Male/Female Jumper Wires

Generic power supply (5V-7v)

Arduino kit 2: K30, LCD1602, connection wires.

<h3 >Overview</h3><p >This project is about monitoring CO2 levels at home, in the greenhouse, in that small office, etc.</p><p ><span >Some time ago I started working on an open source Raspberry Pi indoor air quality monitor called </span><a href="http://www.livpi.com/">LiV Pi</a><span >. I tried a number of analog CO2 sensors for that project, but I ran into calibration issues - until I got a K30 CO2 module. This is a NDIR, digital, auto-calibrating sensor, so it's pretty easy to use. </span></p><p ><span >I am now starting a new open source project, this time using Arduino. I uploaded a I2C library for this sensor on Github: </span><a href="https://github.com/FirstCypress/K30_CO2_I2C_Arduino">K30_CO2_I2C_Arduino.</a><span > This photo shows K30 connected to Arduino. CO2 measurements are displayed on LCD1602 screen. </span></p><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/cad68db2-8e76-41e2-9e67-11c9465f49d0.JPG alt="" ></figure></div><p >And here is a close-up of the sensor. It can also be connected over serial and it has a 400 ppm calibration switch.</p><div class="se-component se-image-container __se__float-none" contenteditable="false"> <figure style="margin: 0px;"><img src=https://projects.arduinocontent.cc/5bc772fb-f5c3-480e-832e-8fdc3228d7ac.jpeg alt="" ></figure></div><h3 >Instructions</h3><ul ><li >Connect the parts according to the diagram.</li></ul><ul ><li >Download library .zip file and add it to your Arduino IDE.</li></ul><ul ><li >Open &#34;k30_LCD_I2C_lib_test&#34; sketch from examples section.</li></ul><ul ><li >Compile and download code on your Arduino.</li></ul>

Connection Diagram

K30_CO2_I2C_Arduino

Github repository for K30 I2C library