MH-Z19B carbon dioxide detection alarm-51 version

Overview

1. Hardware information

Main control: STC89C52RC

Sensor: MH-Z19B module (acquire concentration via UART)

Display: LCD1602

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2. Function introduction

Real-time monitoring of indoor carbon dioxide ppm value, detection range: 0~5000ppm
With alarm function, alarm threshold can be set
Equipped with relay and buzzer alarm modes, both modes can be turned on independently through settings
It has a power-off save function and can store setting parameters.

(See code comments for details)

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3. Display of physical objects and 3D pictures

Design Files

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