{"id":238798,"date":"2021-09-15T11:25:08","date_gmt":"2021-09-15T09:25:08","guid":{"rendered":"https:\/\/emariete.com\/?p=238798"},"modified":"2021-09-15T11:25:08","modified_gmt":"2021-09-15T09:25:08","slug":"co2-meter-mobile-esp32-sensirion-scd30-basic","status":"publish","type":"post","link":"https:\/\/emariete.com\/en\/medidor-co2-movil-esp32-sensirion-scd30-basico\/","title":{"rendered":"CO2 meter on your mobile phone with ESP32 and Sensirion SCD30 sensor [BASIC VERSION] [BASIC VERSION]."},"content":{"rendered":"
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\u26a0\ufe0f Important notice:<\/strong> This is the original version<\/strong> CO2 Gadget, published in 2021. Since then, the firmware has evolved considerably. The current version<\/strong> It includes Wi-Fi, MQTT, Home Assistant Discovery, particulate matter sensors, low power consumption, a web interface with an Apple-style design and many more features. Everything explained here is still valid, but I recommend you check the updated home page<\/strong><\/a> to find out all the latest news.<\/p>\n\n<\/div><\/div>\n\n\n\n

<\/p>\n\n\n\n

Welcome to this tutorial in which you will learn how to build the basic version of the CO2 meter with App for Android and iOS, using Bluetooth, following the official project of the sensor manufacturer Sensirion<\/strong>.<\/p>\n\n\n\n

I estimate that you can complete the project in less than an hour<\/strong>by following the steps in the tutorial.<\/p>\n\n\n\n

Both the firmware as well as the App<\/strong> of this CO2 meter have been prepared by Sensirion, one of the world's largest manufacturers of quality CO2 sensors<\/strong> and, therefore, who knows the most about its measurement.<\/p>\n\n\n

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The meter works very well<\/strong>we could expect no less coming from one of the world's leading CO2 sensor manufacturers<\/strong>such as Sensirion.<\/p>\n\n\n\n

By the way, the mobile App is very professional and of high quality<\/strong>. I'm sure you'll love it.<\/p>\n\n\n

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\"\"<\/a><\/figure>\n<\/div>\n\n\n

The sensor used is the SCD30. A dual channel NDIR sensor <\/strong>with integrated temperature and humidity sensor. One of the best options available on the market <\/strong>at a reasonable price.<\/p>\n\n\n\n

The most important facts about the Sensirion SCD30 are as follows:<\/p>\n\n\n\n

CO sensor specifications2<\/sub><\/th><\/tr><\/thead>
Measuring range CO2<\/sub><\/td>0 - 40'000 ppm<\/td><\/tr>
Accuracy<\/td>\u00b130 ppm + 3% of the measurement<\/td><\/tr>
Humidity sensor specifications<\/th><\/tr>
Relative humidity measuring range<\/td>0 - 100 % HR<\/td><\/tr>
Typical accuracy<\/td>\u00b13% HR (0-100% HR)<\/td><\/tr>
Temperature sensor specifications<\/th><\/tr>
Temperature measuring range<\/td>-40 \u00b0C - 70 \u00b0C<\/td><\/tr>
Typical accuracy (\u00b0C)<\/td>\u00b1 (0,4 \u00b0C + 0,023 x (T [\u00b0C] - 25 \u00b0C))<\/td><\/tr>
Electrical specifications<\/th><\/tr>
Supply voltage<\/td>3.3 - 5.5 V<\/td><\/tr>
Average current measurement rate @ 2s<\/td>19 mA<\/td><\/tr>
Max. current<\/td>75 mA<\/td><\/tr><\/tbody><\/table>
Sensirion SCD30 Key Specifications<\/figcaption><\/figure>\n\n\n\n

If you want to know more, you can download here the SCD30 datasheet<\/a>.<\/p>\n\n\n

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Sensirion SCD30 CO2 Sensor<\/figcaption><\/figure>\n<\/div>\n\n\n

The main purpose of having prepared this detailed tutorial is to to make it easier for everyone to build it.<\/strong>especially for people who do not understand English or do not know much about electronics and\/or Arduino programming.<\/strong>.<\/p>\n\n\n\n

It is a project suitable for all levels and the result is very good.<\/strong>Completely professional!<\/p>\n\n\n\n

This tutorial is accompanied by a video, which you can find below, with everything explained step by step and in detail.<\/strong><\/p>\n\n\n\n

In this tutorial you will see, step by step, how:<\/p>\n\n\n\n

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  1. Preparing the Hardware: Learning how to make the sensor wiring to the development board<\/strong><\/li>\n\n\n\n
  2. Save the firmware <\/strong>on the development board<\/li>\n\n\n\n
  3. Display CO2 levels<\/strong> in your computer <\/strong>and on mobile or tablet with the Sensirion MyAmbience App<\/strong><\/li>\n\n\n\n
  4. Extras: Some tips, tricks and additional information<\/strong><\/li>\n<\/ol>\n\n\n\n
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    I recommend that you use my own extended version of the firmware.<\/strong><\/p>\n\n\n\n

    It is a major leap forward over what you can see in this article. It has been built by hundreds of users and is probably the most advanced CO2 meter of its kind in the world (including commercial and non-commercial meters).<\/p>\n\n\n\n

    You have it in the following article:<\/strong><\/p>\n\n\n

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    CO2 Gadget: Advanced CO2 Monitor<\/a><\/blockquote>