Electrochemical formaldehyde module Product description The M1001Y electrochemical formaldehyde module is a general-purpose, compact module. Using electrochemical principles to detect CH 2 O in the air, it has good selectivity and stability. The built-in temperature sensor can be used for temperature compensation; it also has digital output and analog voltage output modes, which is convenient to use. M1001Y is a general-purpose gas module designed and manufactured by closely combining mature electrochemical detection technology with sophisticated circuit design. Module features High sensitivity, high resolution, low power consumption, long service life Provide UART data output method High stability, excellent anti-interference ability, temperature compensation, excellent linear output Main application Portable meters, air quality monitoring equipment, air purifiers, fresh air ventilation systems, air conditioners, smart home equipment and other places.

Communication is divided into active upload type and question and answer type. The factory defaults to actively upload, and the concentration value is sent every 1S. If the user switches to Q&A mode and needs to switch to active upload again, just send the following command line format:

In Q&A mode, the command format for reading concentration is as follows Gas concentration value = high gas concentration * 256 + low gas concentration The reference routine is as follows: ^************************************************* ********************* * Function name: unsigned char FucCheckSum(uchar *i,ucharln) * Function description: Sum check (take the sum of 1\2\3\4\5\6\7 of the sending and receiving protocol to be inverted + 1) * Function description: the element of the array 1 -the penultimate element After the addition, take the inverse +1 (the number of elements must be greater...

Cross interference characteristics This sensor module can respond to other gases except the target gas. Now the sensor’s response to several common interference gases The application characteristics are listed in the table below for reference. The data in the table is the typical response of the gas at a given concentration. Table 2: Cross interference characteristics Precautions When installing 2.54mm connector pins, soldering should be completed quickly to avoid damage to the sensor structure caused by the long-term high temperature of the soldering iron; The aging time before use is not less...