Question: PMS7003 with Arduino MEGA2560

vinushi1995 is asking a question about air-quality: Subscribe to answer questions on this topic

vinushi1995 asked on July 21, 2019 04:12
87 views | 0 answers | #20210


Hello, a first timer here. Thanks in Advance for anyone kind enough to offer me advice.

i have been trying to make an air quality monitor using the Aircasting app. To measure particulate matter i got the PMS7003 Sensor. Does anyone know a proper wiring diagram and a code that works with arduino? I've been trying some codes but have been encountering problems in most of them. This is the latest code i've been using and it seems to be giving values in 100s which is very high

include

SoftwareSerial mySerial(10,11); // Arudino Uno port RX, TX

void setup() {
// for debuging
Serial.begin(115200);

// Use software serial
mySerial.begin(9600);
}

void loop() {
// put your main code here, to run repeatedly:
static int CheckFirst=0;
static int pm_add[3][5]={0,};
static int pm_old[3]={0,};
int chksum=0,res=0;;
unsigned char pms[32]={0,};


if(mySerial.available()>=32)
{

for(int j=0; j<32 ; j++){
pms[j]=mySerial.read();
if(j<30)
chksum+=pms[j];
}

if(pms[30] != (unsigned char)(chksum>>8)
|| pms[31]!= (unsigned char)(chksum) ){


}
if(pms[0]!=0x42 || pms[1]!=0x4d )


Serial.print("Dust raw data debugging : ");
Serial.print("1.0ug/m3:");
Serial.print(pms[10]);
Serial.print(pms[11]);
Serial.print(" ");
Serial.print("2.5ug/m3:");
Serial.print(pms[12]);
Serial.print(pms[13]);
Serial.print(" ");
Serial.print("10ug/m3:");
Serial.print(pms[14]);
Serial.println(pms[15]);
}


delay(2000);}

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2 Comments

Good to see your project. 1. In the code the TX , RX pins mention Board associated as Arduino UNO but you are using Mega. Kindly check the pin connections. RX pin of Board as to be TX pin of PM sensor and same for TX as well.

  1. Links where you can find detailed information 👍 https://publiclab.org/notes/cfastie/11-28-2018/nano-particle-monitoring
  2. This link is from Adafruit. Check for the board and PM sensor variant and modify accordingly. https://learn.adafruit.com/pm25-air-quality-sensor?view=all

Hope this helps.

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@silentsairam Thank you so much for the advice! I sure will look into it. 😃


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