/* Create a WiFi access point and provide a web server for pm2.5 on it. */ #include  #include  #include  /* Set these to your desired credentials. */ const char *ssid = "AirMonitor"; const char *password = "inovafitness"; ESP8266WebServer server(80); // this is a demo for Arduino PM2.5 sensor test // PM2.5 sensor is from www.inovafitness.com SDS011 unsigned int Pm25 = 0;//used for result pm2.5 unsigned int Pm10 = 0;//used for result pm10 unsigned char Pm25IsNew = 0;//show if pm25 is refreshed void ProcessSerialData() { uint8_t mData = 0; uint8_t i = 0; uint8_t mPkt[10] = {0}; uint8_t mCheck = 0; while (Serial.available() > 0) { // from www.inovafitness.com // packet format: AA C0 PM25_Low PM25_High PM10_Low PM10_High 0 0 CRC AB mData = Serial.read(); delay(2); if(mData == 0xAA)//head1 ok { delay(400);//wait until packet is received mPkt[0] = mData; mData = Serial.read(); if(mData == 0xc0)//head2 ok { mPkt[1] = mData; mCheck = 0; for(i=0;i < 6;i++)//data recv and crc calc { mPkt[i+2] = Serial.read(); delay(2); mCheck += mPkt[i+2]; } mPkt[8] = Serial.read(); delay(1); mPkt[9] = Serial.read(); if(mCheck == mPkt[8])//crc ok { Serial.flush(); //Serial.write(mPkt,10); Pm25 = (uint16_t)mPkt[2] | (uint16_t)(mPkt[3]<<8); Pm10 = (uint16_t)mPkt[4] | (uint16_t)(mPkt[5]<<8); if(Pm25 > 9999) Pm25 = 9999; if(Pm10 > 9999) Pm10 = 9999; //get one good packet Pm25IsNew = 1; return; } } } } } /* Just a little test message. Go to http://192.168.4.1 in a web browser * connected to this access point to see it. */ void handleRoot() { char pm25_str[100]; char *pm25_format_red = "
Pm2.5=%d.%d
"; char *pm25_format_green = "
Pm2.5=%d.%d
"; char *pm25_format_blue = "
Pm2.5=%d.%d
"; if (Pm25<150)//15.0 sprintf(pm25_str,pm25_format_green, Pm25/10,Pm25%10); else if (Pm25<500)//pm2.5<50.0 sprintf(pm25_str,pm25_format_blue, Pm25/10,Pm25%10); else sprintf(pm25_str,pm25_format_red, Pm25/10,Pm25%10); server.send(200, "text/html", pm25_str); } void setup() { delay(1000); Serial.begin(9600); Serial.println(); Serial.print("Configuring access point..."); /* You can remove the password parameter if you want the AP to be open. */ WiFi.softAP(ssid, password); delay(500); delay(500); //while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println("done"); IPAddress myIP = WiFi.softAPIP(); Serial.print("AP IP address: "); Serial.println(myIP); server.on("/", handleRoot); server.begin(); Serial.println("HTTP server started"); } void loop() { server.handleClient(); ProcessSerialData(); }