This device provides support for reminding indoor ventilation.
#My problem: How to make targeted ventilation scientifically?
Cold winter is coming, we always close our doors and windows to form a closed environment to block the entry of cold outside air. As we inhale the oxygen in the air and exhale the carbon dioxide(CO2) produced in the body, the oxygen in the room is not replenished, so the concentration of CO2 is getting higher and higher.
What are the long-term effects of high carbon dioxide levels on the human body?
High CO2 values reduce the staff's attention and working behavior, which is one of the reasons why you will always feel sleepy in winter. Therefore, targeted ventilation helps us to stop creeping fatigue processes at the office, especially during the covid-19 period, we need to pay high attention to air quality and ventilation.
Carbon dioxide concentration standard:
How much PPM is harmful to the human body?
The human body is very sensitive to the increase of CO2 in the air, and every 0.5% increase in the carbon dioxide content will cause obvious reactions in the human body. If we are in a room with too much CO2 for a short period of time, CO2 will have the following effects on our bodies:
See the attached Picture:
Therefore, from the chart, we can clearly see that we will feel comfortable when the indoor CO2 concentration is below 700 ppm. Knowing the concentration of carbon dioxide in the air is very useful for our work and life. We would like to take the initiative to make regular operations a little safer in Corona times and appreciate climate protection at the same time.
#My solution: CO2 Monitoring machine with Wio terminal
SenseCAP K1100 is an open-source prototype kit designed to incentivize the co-creation of IoT sensors to tackle real-world challenges. It is compatible with easy-to-start programming platforms like Arduino for customized coding. In addition, users can also train the Wio Terminal TinyML models using in-builds and Grove sensors.
Hence we choose Wio terminal and Grove CO2 Sensor for this project.
To install the firmware for the Grove CO2 Sensor (SCD30):
· Step 1. Download the SenseCraft latest firmware from Github.
· Step 2. Connect Grove CO2 Sensor with Wio terminal.
· Step 3. Uplink:Network connectivity
After that, we can read the CO2 data on the wio terminal to determine whether can we open the door for ventilation at the moment. Unfortunately, I didn't get a buzzer this time as it's out of stock currently. For the upgraded version, I want to connect it with my wio terminal, if CO2 has over 700 PPM, then it will make some noise to remind us to make ventilation.
It is a really wonderful thing to learn artificial intelligence and apply it in our real life.
For me, I'm really happy to get CO2 monitoring machine for my ventilation program. I am so glad to work in an environment with an atmosphere of smart technology. My future plan is to learn more knowledge about Edge Impulse and use Arduino IDE to program the project.
Welcome to let me know if you have any suggestions.
Thank you for your attention! :)
(When I was learning the Knowledge of Edge Impulse at Seeed in 2021.)
Last but not the least, I'd love to express my special thanks to those who came in help during my tinkering:
@Mengdu.li : Technical support
@Meilily.li : Typesetting suggestion
@Susi.Yeoh : Edit suggestion
Thanks for being my tower of strength. @.@ 🤗
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