Gravity: PM2.5激光粉尘环境质量传感器 V2
2023-02-107676
AI 快速预览详细
本文介绍了如何解决Gravity: PM2.5激光粉尘环境质量传感器 V2数据一直为零的问题。通过检查0x42和0x4D标志位以及数据校验和，可以有效定位和解决传感器数据读取问题。具体步骤包括设置串口超时时间、读取数据包、验证数据包完整性等。通过这些步骤，用户可以快速修复传感器数据读取问题，确保传感器正常工作。
 我得到的数据一直是零有人知道是怎么改吗 #include <Arduino.h>#define LENG 31 //0x42 + 31 bytes equal to 32 bytesunsigned char buf[LENG;int PM01Value=0; //define PM1.0 value of the air detector moduleint PM2_5Value=0; //define PM2.5 value of the air detector moduleint PM10Value=0; //define PM10 value of the air detector modulevoid setup(){ Serial.begin(9600); //use serial0 Serial.setTimeout(1500); //set the Timeout to 1500ms, longer than the data transmission periodic time of the sensor}void loop(){ if(Serial.find(0x42)){ //start to read when detect 0x42 Serial.readBytes(buf,LENG); if(buf[0 == 0x4d){ if(checkValue(buf,LENG)){ PM01Value=transmitPM01(buf); //count PM1.0 value of the air detector module PM2_5Value=transmitPM2_5(buf);//count PM2.5 value of the air detector module PM10Value=transmitPM10(buf); //count PM10 value of the air detector module } } } static unsigned long OledTimer=millis(); if (millis() - OledTimer >=1000) { OledTimer=millis(); Serial.print("PM1.0: "); Serial.print(PM01Value); Serial.println(" ug/m3"); Serial.print("PM2.5: "); Serial.print(PM2_5Value); Serial.println(" ug/m3"); Serial.print("PM1 0: "); Serial.print(PM10Value); Serial.println(" ug/m3"); Serial.println(); }}char checkValue(unsigned char *thebuf, char leng){ char receiveflag=0; int receiveSum=0; for(int i=0; i<(leng-2); i++){ receiveSum=receiveSum+thebuf[i; } receiveSum=receiveSum + 0x42; if(receiveSum == ((thebuf[leng-2<<8)+thebuf[leng-1)) //check the serial data { receiveSum = 0; receiveflag = 1; } return receiveflag;}int transmitPM01(unsigned char *thebuf){ int PM01Val; PM01Val=((thebuf[3<<8) + thebuf[4); //count PM1.0 value of the air detector module return PM01Val;}//transmit PM Value to PCint transmitPM2_5(unsigned char *thebuf){ int PM2_5Val; PM2_5Val=((thebuf[5<<8) + thebuf[6);//count PM2.5 value of the air detector module return PM2_5Val; }//transmit PM Value to PCint transmitPM10(unsigned char *thebuf){ int PM10Val; PM10Val=((thebuf[7<<8) + thebuf[8); //count PM10 value of the air detector module return PM10Val;} |
