» Ga v30 09: NO2 sensor
Turn on the Gases Board v30 and read the NO2 sensor every second, printing the result through the USB
Required Materials
1 x Waspmote
1 x Battery
1 x MiniUSB wire
1 x Gases Board v30
1 x NO2 sensor
Notes
- This example is valid only for Waspmote v15
Code
/*
* ------ [Ga_v30_9] NO2 Sensor reading for v30 --------
*
* Explanation: Turn on the Gases Board v30 and read the NO2
* sensor every second, printing the result through the USB
*
* Copyright (C) 2016 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: 3.0
* Design: David Gascón
* Implementation: Ahmad Saad
*/
// Library include
#include <WaspSensorGas_v30.h>
#include <WaspFrame.h>
// NO2 Sensor must be connected physically in SOCKET_3
NO2SensorClass NO2Sensor;
// Concentrations used in calibration process
#define POINT1_PPM_NO2 10.0 // <-- Normal concentration in air
#define POINT2_PPM_NO2 50.0
#define POINT3_PPM_NO2 100.0
// Calibration voltages obtained during calibration process (in KOHMs)
#define POINT1_RES_NO2 45.25 // <-- Rs at normal concentration in air
#define POINT2_RES_NO2 25.50
#define POINT3_RES_NO2 3.55
// Define the number of calibration points
#define numPoints 3
float concentrations[] = {POINT1_PPM_NO2, POINT2_PPM_NO2, POINT3_PPM_NO2};
float voltages[] = {POINT1_RES_NO2, POINT2_RES_NO2, POINT3_RES_NO2};
char node_ID[] = "NO2_example";
void setup()
{
// Calculate the slope and the intersection of the logarithmic function
NO2Sensor.setCalibrationPoints(voltages, concentrations, numPoints);
// Configure the USB port
USB.ON();
USB.println(F("NO2 Sensor reading for v30..."));
///////////////////////////////////////////
// 1. Turn on the board and the SOCKET
///////////////////////////////////////////
// Switch ON and configure the Gases Board
Gases.ON();
// Switch ON the sensor socket
NO2Sensor.ON();
}
void loop()
{
//////////////////////////////////////////
// 2. Read sensors
/////////////////////////////////////////
// PPM value of NO2
float NO2Vol = NO2Sensor.readVoltage(); // Voltage value of the sensor
float NO2Res = NO2Sensor.readResistance(); // Resistance of the sensor
float NO2PPM = NO2Sensor.readConcentration(); // PPM value of NO2
// Print of the results
USB.print(F("NO2 Sensor Voltage: "));
USB.print(NO2Vol);
USB.print(F(" V |"));
// Print of the results
USB.print(F(" NO2 Sensor Resistance: "));
USB.print(NO2Res);
USB.print(F(" Ohms |"));
// Print of the results
USB.print(F(" NO2 concentration Estimated: "));
USB.print(NO2PPM);
USB.println(F(" PPM"));
///////////////////////////////////////////
// 3. Create ASCII frame
///////////////////////////////////////////
// Create new frame (ASCII)
frame.createFrame(ASCII, node_ID);
// Add VOC PPM value
frame.addSensor(SENSOR_GASES_NO2, NO2PPM);
// Show the frame
frame.showFrame();
delay(1000);
}
Output
H#
NO2 Sensor reading for v30...
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652330234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#0#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652331234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#1#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652332234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#2#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652333234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#3#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652334234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#4#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652335234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#5#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652336234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#6#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652337234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#7#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652338234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#8#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 49
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C652339234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#9#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233130234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#10#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233131234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#11#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233132234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#12#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233133234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#13#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233134234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#14#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233135234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#15#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233136234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#16#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233137234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#17#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233138234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#18#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233139234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#19#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233230234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#20#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233231234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#21#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233232234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#22#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233233234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#23#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233234234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#24#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233235234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#25#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233236234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#26#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233237234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#27#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233238234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#28#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233239234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#29#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233330234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#30#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233331234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#31#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233332234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#32#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233333234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#33#NO2:122.973#
===============================
NO2 Sensor Voltage: 2.3680553436 V | NO2 Sensor Resistance: -2998.5332031250 Ohms | NO2 concentration Estimated: 122.9727172851 PPM
===============================
Current ASCII Frame:
Length: 50
Frame Type: 134
frame (HEX): 3C3D3E86012334313138373036334439333734324634234E4F325F6578616D706C65233334234E4F323A3132322E39373323
frame (STR): <=>�#41187063D93742F4#NO2_example#34#NO2:122.973#
===============================