Methane, CH4, and Carbon Dioxide, CO2, are two prominent "greenhouse" gases which have an impact on global warming.
A Methane sensor, type MQ-4, and a Carbon Dioxide sensor, type MQ-135, together with an ESP32 microcontroller are being used to measure the concentration ( in parts per million/billion ppm/ppb ) of these gases in the atmosphere. Measurements are sent every 15 minutes to cloud hosted repositories, ( "thingspeak.com" and "ubidots.com" ), for display and analysis.
 |
| Prototype system during development, left MQ-4, right MQ-135 |
Only the sensors are deployed outdoors, in a protective enclosure. The microcontroller is situated indoors for reliable WiFi connectivity and convenience when uploading the software.
 |
| Sensors deployed outdoors |
A channel having public access is available for viewing the data on ThingSpeak. Search for channels belonging to user ID "spacerlabs". Select "Greenhouse Gas Monitor".
Or use this link to view the data on the Ubidots cloud: https://stem.ubidots.com/app/dashboards/public/widget/shcI08ZiIypoF46IbKr_3obmWpSM6lD2iIBIlLcagoI
