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GP v30 01: Electrochemical gas sensors

This is the basic code to manage and read an electrochemical gas sensor. These sensors include: CO, O2, O3, NO, NO2, SO2, NH3, H2, H2S, HCl, HCN, PH3, ETO and Cl2.

Required Materials

1 x Waspmote 1 x Battery 1 x Gases PRO board v30 1 x Temperature, Humidity and Pressure sensor BME280 1 x Electrochemical Gas Sensor [Calibrated]

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. - Cycle time: 2 minutes

Code

/*
* ------------ [GP_v30_01] - Electrochemical gas sensors --------------
*
* Explanation: This is the basic code to manage and read an electrochemical
* gas sensor. These sensors include: CO, O2, O3, NO, NO2, SO2, NH3, H2, H2S,
* HCl, HCN, PH3, ETO and Cl2. Cycle time: 2 minutes
*
* 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: 3.1
* Design: David Gascón
* Implementation: Alejandro Gállego
*/
#include <WaspSensorGas_Pro.h>
/*
* Define object for sensor: gas_PRO_sensor
* Input to choose board socket.
* Waspmote OEM. Possibilities for this sensor:
* - SOCKET_1
* - SOCKET_2
* - SOCKET_3
* - SOCKET_4
* - SOCKET_5
* - SOCKET_6
* P&S! Possibilities for this sensor:
* - SOCKET_A
* - SOCKET_B
* - SOCKET_C
* - SOCKET_F
*/
Gas gas_PRO_sensor(SOCKET_2);
float concentration; // Stores the concentration level in ppm
float temperature; // Stores the temperature in ºC
float humidity; // Stores the realitve humidity in %RH
float pressure; // Stores the pressure in Pa
void setup()
{
USB.println(F("Electrochemical gas sensor example"));
///////////////////////////////////////////
// 1. Turn on the sensors
///////////////////////////////////////////
// Power on the electrochemical sensor.
// If the gases PRO board is off, turn it on automatically.
gas_PRO_sensor.ON();
// First sleep time
// After 2 minutes, Waspmote wakes up thanks to the RTC Alarm
PWR.deepSleep("00:00:02:00", RTC_OFFSET, RTC_ALM1_MODE1, ALL_ON);
}
void loop()
{
///////////////////////////////////////////
// 2. Read sensors
///////////////////////////////////////////
// Read the electrochemical sensor and compensate with the temperature internally
concentration = gas_PRO_sensor.getConc();
// Read enviromental variables
temperature = gas_PRO_sensor.getTemp();
humidity = gas_PRO_sensor.getHumidity();
pressure = gas_PRO_sensor.getPressure();
// And print the values via USB
USB.println(F("***************************************"));
USB.print(F("Gas concentration: "));
USB.print(concentration);
USB.println(F(" ppm"));
USB.print(F("Temperature: "));
USB.print(temperature);
USB.println(F(" Celsius degrees"));
USB.print(F("RH: "));
USB.print(humidity);
USB.println(F(" %"));
USB.print(F("Pressure: "));
USB.print(pressure);
USB.println(F(" Pa"));
///////////////////////////////////////////
// 5. Sleep
///////////////////////////////////////////
// Go to deepsleep
// After 2 minutes, Waspmote wakes up thanks to the RTC Alarm
PWR.deepSleep("00:00:02:00", RTC_OFFSET, RTC_ALM1_MODE1, ALL_ON);
}

Output

H#
Electrochemical gas sensor example
***************************************
Gas concentration: 1.0250854492 ppm
Temperature: 23.7700004577 Celsius degrees
RH: 43.6787109375 %
Pressure: 99772.0937500000 Pa
***************************************
Gas concentration: 0.9870300292 ppm
Temperature: 23.8099994659 Celsius degrees
RH: 43.6845703125 %
Pressure: 99764.1406250000 Pa
***************************************
Gas concentration: 0.9490051269 ppm
Temperature: 23.7999992370 Celsius degrees
RH: 43.6767578125 %
Pressure: 99769.3125000000 Pa
***************************************
Gas concentration: 1.0631408691 ppm
Temperature: 23.7700004577 Celsius degrees
RH: 43.6679687500 %
Pressure: 99775.5625000000 Pa
Last modified 2yr ago