The source code of the works of netizens participating in the open source DIY activity of Pingtou Ge RVB2601. The works mainly include the RVB2601 development board, which is used for computing, networking and cloud, collection and display board, and data collection and display function board. The screen size of the RVB2601 development board is limited, and the display effect of pictures is not good, so an RGB565 color LCD screen is selected as the display. The choice of sensors is basically to use a sensor module with positive and negative power supply and an analog interface, or a sensor module for ship-type data communication, so that the sensor module does not need to draw a separate board, and can be connected farther, and can also support configurable collection of gas types. The MQ series sensors are very rich. The collection and display board of the sensor needs to be changed. At present, a 7805 chip is used to change from 12V to 5V power supply, but it is very unstable when connecting three sensors. When connecting two sensors, the power supply is very hot and can not last for a second when touched by hand. For details, please refer to the work submission post: https://en.eeworld.com/bbs/thread-1205785-1-1.html
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