Arduino+ze08-ch2o formaldehyde module, output formaldehyde content

 

🥰 Blog's front page ：knighthood2001

Comments are welcome on thumb up ️

️ love python, Looking forward to progress and growth with you ！！️

I would like to recommend a popular question brush 、 Interview job website

Catalog

ZE08-CH2O brief introduction  

Pin instructions

Pin connection

arduino Code display

Write at the end

---

ZE08-CH2O brief introduction  

        ZE08-CH2O The electrochemical formaldehyde module is a general-purpose module 、 Miniaturization module . Use the electrochemical principle to detect the presence of CH2O( formaldehyde ) To detect , It has good selectivity , stability . Built in temperature sensor , Temperature compensation is available ; It has both digital output and analog voltage output , Easy to use .

Pin instructions

        ZE08-CH2O Data processing circuit has been integrated inside the module , Convert formaldehyde concentration signal into electrical signal , Finally, it is converted into data signals , Through serial port （UART） Send it out .

        ZE08-CH2O Module adoption A serial port communication , Serial port baud rate and other parameters are as follows , The baud rate defaults to 9600, Non modifiable . 

         Communication is divided into active upload and question and answer , Factory default active upload , Every interval 1S Send a concentration value , Here the author mainly explains the active upload ：

The instructions are as follows

The calculation formula of the obtained gas concentration is ：

Gas concentration value = High gas concentration *256+ Low gas concentration

Pin connection

          From above , We usually only need Use 3 foot 、4 foot 、5 Feet and 6 foot , Besides because 5 Feet are RXD（receive data） receive data , Therefore, you can also not connect

 

arduino Code display

         Be careful ： During code burning , It's better to RX and TX Unplug the cable of , Avoid burning failure

int incomingByte = 0; 
int a[9] = {0};
int c = 0;
void setup() {
  Serial.begin(9600);
  Serial.println("START");  
}

void loop() {
      delay(5);
      if(Serial.available() > 0){
         for (int i=0; i<9; i++){
            incomingByte = Serial.read();
            Serial.print(i);
            Serial.print("read:");
            Serial.println(incomingByte);
            delay(20);
            a[i] = incomingByte; 
//            Serial.println(a[i]);                  
         } 
         c = a[4]*256 + a[5];
         Serial.print(" formaldehyde ：");  
         Serial.println(c);        
      }
  }

Here we use array , Use the formula to calculate the formaldehyde value .

give the result as follows ： 

Write at the end

        The above content is what the author is doing in the project , Find out arduino There is no ready-made code to use , So I wrote this article , If there is a mistake , Please correct me. ！！