利用EEPROM实现单片机的数据掉电保存及利用I2C模式进行通讯。

MCU use EEPROM data preservation and the use of power-down mode I2C communications.

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另外还采用了最新电源监控芯片X5045既可以监控程序防止程序跑飞，又可以在掉电时保存重要参数和数据。

In addition, updated power monitoring chip of X5045 is used not only to monitor program against the program running over, but also to store data and important parameters when power is off.

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为了防止系统掉电时数据丢失，采用EEPROM保存报警阈值、最新浓度值等重要数据；

Important data such as warning limit and latest concentrations are saved into EEPROM in case of power break.

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