Development

» GP v30 04 – Particle Matter Sensor

This is the basic code to manage and read the particle sensor.

Required Materials

1 x Waspmote
1 x Battery
1 x Gases PRO board v30
1 x Particle matter sensor

Notes

- Remember to connect the battery to Waspmote for proper operation.
- The connection of the sensor is described in the Gases PRO v30 technical guide.

Code

/*
 *  ------------  [GP_v30_04] - Particle Matter Sensor  --------------
 *
 *  Explanation: This is a complete code to manage and read the particle
 *  sensor.
 *
 *  Copyright (C) 2018 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  Version:           3.1
 *  Design:            David Gascón
 *  Implementation:    Isabel Burillo
 */

#include <WaspPM.h>
#include <WaspFrame.h>

/*
 * P&S! Possibilities for this sensor:
 * 	- SOCKET_D
 */

 char info_string[61];
 char serial_number[61];
 int status;
 int measure;

 void setup()
 {
   USB.println(F("Particle Matter Sensor example"));

   // switch on sensor
   status = PM.ON();

   // check answer
   if (status == 1)
   {
     // get info from sensor
     status = PM.getInfoString(info_string);

     if (status == 1)
     {
       USB.println(F("Information string extracted:"));
       USB.println(info_string);
     }
     else
     {
       USB.println(F("Error reading the particle sensor"));
     }

     // read serial number from sensor. That funtion isn't avalable for OPC-N2 sensor
     status = PM.readSerialNumber(serial_number);
     if (status == 1)
     {
       USB.print(F("Serial number: "));
       USB.println(serial_number);

     }
     else
     {
       USB.println(F("Error reading the serial number"));
     }

     // switch off sensor
     PM.OFF();
   }
   else
   {
     USB.println(F("Error starting the particle sensor"));
   }
 }


 void loop()
 {
   ///////////////////////////////////////////
   // 1. Turn on the sensor
   ///////////////////////////////////////////

   // Power on the PM sensor
   status = PM.ON();

   // check answer
   if (status == 1)
   {
     USB.println(F("Particle sensor started"));

   }
   else
   {
     USB.println(F("Error starting the particle sensor"));
   }


   ///////////////////////////////////////////
   // 2. Read sensor
   ///////////////////////////////////////////
   if (status == 1)
   {
     // Power the fan and the laser and perform a measure of 5 seconds
     measure = PM.getPM(5000, 5000);

     // check answer
     if (measure == 1)
     {
       USB.println(F("Measure performed"));
       USB.print(F("PM 1: "));
       USB.printFloat(PM._PM1, 3);
       USB.println(F(" ug/m3"));
       USB.print(F("PM 2.5: "));
       USB.printFloat(PM._PM2_5, 3);
       USB.println(F(" ug/m3"));
       USB.print(F("PM 10: "));
       USB.printFloat(PM._PM10, 3);
       USB.println(F(" ug/m3"));
       USB.print(F("Temp: "));
       USB.print(PM._temp);
       USB.println(F(" ºC"));
       USB.print(F("Hum: "));
       USB.print(PM._hum);
       USB.println(F(" %RH"));
       USB.print("Bin: ");
       for (int i = 0; i < 24; i++)
       {
         USB.print(PM._bin[i]);
         USB.print(";");
       }
       USB.println();
     }
     else
     {
       USB.print(F("Error performing the measure. Error code:"));
       USB.println(measure, DEC);
     }
   }


   ///////////////////////////////////////////
   // 3. Turn off the sensor
   ///////////////////////////////////////////

   // Power off the PM sensor. If there aren't other sensors powered,
   // turn off the board automatically
   PM.OFF();

   ///////////////////////////////////////////
   // 4. Create ASCII frame
   ///////////////////////////////////////////

   if (measure == 1) {

     // Create new frame (ASCII)
     frame.createFrame(ASCII);
     // Add sensor values
     frame.addSensor(SENSOR_GASES_PRO_PM1, PM._PM1);
     frame.addSensor(SENSOR_GASES_PRO_PM2_5, PM._PM2_5);
     frame.addSensor(SENSOR_GASES_PRO_PM10, PM._PM10);
     frame.addSensor(SENSOR_GASES_PRO_TC, PM._temp);
     frame.addSensor(SENSOR_GASES_PRO_HUM, PM._hum);
      // Show the frame
     frame.showFrame();

      // Create new frame (ASCII)
     frame.createFrame(ASCII);
     // Add first 16 bins
     frame.addSensor(SENSOR_GASES_PRO_PM_BINL, PM._binL);
     // Add last 8 bins
     frame.addSensor(SENSOR_GASES_PRO_PM_BINH, PM._binH);
     // Show the frame
     frame.showFrame();

   }

   ///////////////////////////////////////////
   // 5. Sleep
   ///////////////////////////////////////////

   // Go to deepsleep
   // After 3 minutes, Waspmote wakes up thanks to the RTC Alarm
   PWR.deepSleep("00:00:03:00", RTC_OFFSET, RTC_ALM1_MODE1, ALL_OFF);

 }

Output

J#
Particle Matter Sensor example
Information string extracted:
OPC-N3 Iss1.1 FirmwareVer=1.17............................

Serial number: OPC-N3 177470907
Particle sensor started
Measure performed
PM 1: 1.360 ug/m3
PM 2.5: 3.300 ug/m3
PM 10: 10.230 ug/m3
Temp: 23.5199985504 ºC
Hum: 32.9699974060 %RH
Bin: 264;44;19;3;3;2;2;0;2;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;
===============================
Current ASCII Frame:
Length: 87
Frame Type: 134
frame (HEX):
3C3D3E86052332313439364630353743313035344444234F50435F4E33233023504D313A312E3336303023504D325F353A332E3330303023504D31303A31302E323330302354433A32332E35322348554D3A33332E3023
frame (STR):
<=>�#21496F057C1054DD#OPC_N3#0#PM1:1.3600#PM2_5:3.3000#PM10:10.2300#TC:23.52#HUM:33.0#
===============================
===============================
Current ASCII Frame:
Length: 100
Frame Type: 134
frame (HEX): 3C3D3E86022332313439364630353743313035344444234F50435F4E33233123504D5F42494E4C3A3236343B34343B31393B333B333B323B323B303B323B303B303B303B303B303B303B3023504D5F42494E483A303B303B303B303B303B303B303B3023
frame (STR):
<=>�#21496F057C1054DD#OPC_N3#1#PM_BINL:264;44;19;3;3;2;2;0;2;0;0;0;0;0;0;0#PM_BINH:0;0;0;0;0;0;0;0#
===============================

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