ZH03B error reading stream

[Sholahudin]

I have trouble about reading the stream by ZH03B. Could please help me?

[ShaggyDog18]

How can I help you without knowing anything about trouble you facing? Please, describe.
Try to compile and run an example:

• check up UART settings.
• check up the sensor ZH03B connection to microcontroller (RX to TX, TX to RX)...
• check up the mode in which you are running ZH03B. To learn about modes, please, refer to datasheet.

[Sholahudin]

I am really sorry, the previous problem caused by my jumper cable (bad).

Now, i am having this on my serial monitor. The mode is interchange automatic between Q&A and IU mode. Which one is the best mode ? And how to fix that? Thank you.

[Sholahudin]

Is that up to me (means that I can comment the code for mode that i don't need)?

[Sholahudin]

The value is in ug/m3 right? and why i getting error conitinuously after testing it with spraying perfume (indirect little bit far)? And back to normal after push the UNO reset button.

[Sholahudin]

And, now, without any dust test, my sensor is getting error after several minutes reading.

[Sholahudin]

This is my sensor and Arduino UNO connection.

[ShaggyDog18]

Right, the example is comprehensive includes/tests all the features of the sensor. You may simplify it by removing almost everything: sleep() methods as well as switching to other mode, i.e. you loop may look like:

void loop () {
  Serial.println( "Normal default IU Mode. reading every 5 sec" );
  for( int i=0; i<4; i++ ){
    readSensorData();
    delay(5000);
  }
}

Right, select the operation mode you would like to use to communicate with your sensor: UI or QA (described in details at the home page). I cannot judge what is better in your particular case. It depends on your application and requirements.
Use UI for testing, it it simple and available by default.

[ShaggyDog18]

In case you still have issues reading the stream, try to clean RX buffer by the following function:

void RX_flush(void){
  delay(100);   
  while(  _serial.available() ) {
     _serial.read();
  } 
}

Try reading every second (it is reading every 5 seconds in the example), if errors, clean RX after every sensor read.
If still errors, try using Q&A operations mode. This mode could be more stable: you request the sensor, and receive the data stream in the response. So, RX should not override (it potentially could in UI mode).