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Two wireless CO2 sensor units based on Sensirion SCD40 sensor with M5Stack UNIT CO2 I2C sensor, and TeHyBug miniature CO2 sensor device. ... M5Stack provides documentation and Arduino and UIFlow code ...

The Arduino IR sensor module code is very simple and easy to understand. We are just basically keeping track of whether the input to pin D9 is HIGH or LOW. We initialize our code by declaring two ...

The “maker” movement is receiving a lot of attention, especially in the field of education. In this context, we have created an Arduino–carbon dioxide fountain, devised to use digital tools, such as ...

Mainly temperature / humidity sensors, but also one water leagage sensor. Because I wanted to follow also CO2 level in some rooms, I decided to make my own CO2 sensor device using STM32WB and zigbee.