Some gases that you want to be on the lookout for include: They are made sensitive to these gases with a resistive sensor that is tuned to that specific element, or “elements,” as many of these sensors work with multiple gases. Several of these sensors measure the concentration of specific gases. It could also be argued that an environment that is too humid or too dry is also unhealthy. These are not considered to be air quality factors, but accurate temperature and humidity measurements can be used to improve the accuracy of our other sensors. We will also measure temperature and humidity. We will also look at sensors that measure the size of particulate matter, tiny particles of material that are a major cause of pollution and respiratory problems. You can look for levels of specific gases like ozone or carbon dioxide, and the sensors we will be using are available for a wide variety of gases. There are several parameters that you can measure to determine the quality of the air you are breathing. Today we will be using these environmental sensors with both an Arduino and an ESP32, but everything we do today applies to just about any microcontroller.
Arduino sensors tutorial mq2 tutorial serial#
Some of these sensors use the I2C bus to interface with their host, while others use either a serial connection or provide a voltage output for use with an analog-to-digital converter. These sensors can work with almost any microcontroller, as well as with many microcomputers. These can be used to construct an air quality monitor, to create an alarm to alert you to specific gas concentrations, or to automatically activate a fan or open a vent when conditions warrant it. Today we will look at several sensors designed to measure gas levels and various aspects of air quality. Often a strategically placed fan can work wonders. Monitoring the number of specific gases in the air will allow you to take steps to improve the air quality in your home. In addition to the pollutants in the surrounding air, our indoor environments contain several sources of volatile organic chemicals (VOC) and other contaminants. Let’s see how we can use a microcontroller to monitor the quality of the air we breathe! IntroductionĪir pollution is a growing concern in almost every spot on the planet, including the inside of your home. Today we are going to take a look at a multitude of air quality sensors, as well as a few temperature and humidity sensors.
It can detect LPG thus we can make an LPG leakage detection system. The MCP3002 needs to convert this Analog signal from the Gas sensor into a digital signal, which is the only type of signal that the Raspberry Pi can understand.Ĭreate a new python file in the Raspberry Pi Desktop and execute the following command in the terminal.Īs I mentioned previously the MQ2 sensor can sense various gases therefore we can make a wide variety of projects and gadgets with the same.
This is one of the Analog input pins of the MCP3002. The output of the sensor goes into the MCP3002 pin CH0, which is pin 2 of the MCP3002. I have used a Raspberry Pi Model B same pin configuration can be followed for any Raspberry Pi provided you plug in the correct GPIO Pins. Using this chip, the Raspberry Pi can interpret Analog signals coming from the sensor.Ĭonnect the Sensor to Raspberry Pi according to the above diagram. As the Raspberry Pi does not have an ADC (Analog to Digital Converter) built-in like ADIY UNO, We need to use an IC called MCP3002. Any Raspberry Pi with Raspberry Pi OS installed can be used to make the setup work.
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