WHADDA WPSE342 Air Quality Sensor Combo Board User Manual

WHADDA WPSE342 Air Quality Sensor Combo Board

Introduction

• To all residents of the European Union Important environmental information about this product This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm the environment. Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized company for recycling. This device should be returned to your distributor or to a local recycling service. Respect the local environmental rules.
• If in doubt, contact your local waste disposal authorities. Thank you for choosing Whadda! Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, do not install or use it and contact your dealer.

Safety Instructions

• Read and understand this manual and all safety signs before using this appliance.
• For indoor use only.
• This device can be used by children aged from 8 years and above, and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning the use of the device in a safe way and understand the hazards involved. Children shall not play with the device.
• Cleaning and user maintenance shall not be made by children without supervision.

General Guidelines

• Refer to the Velleman® Service and Quality Warranty on the last pages of this manual.
• All modifications of the device are forbidden for safety reasons. Damage caused by user modifications to the device is not covered by the warranty.
• Only use the device for its intended purpose. Using the device in an unauthorized way will void the warranty.
• Damage caused by disregard of certain guidelines in this manual is not covered by the warranty and the dealer will not accept responsibility for any ensuing defects or problems.
• Nor Velleman Group nv nor its dealers can be held responsible for any damage (extraordinary, incidental or indirect) – of any nature (financial, physical…) arising from the possession, use or failure of this product.
• Keep this manual for future reference.

What is Arduino

Arduino® is an open-source prototyping platform based on easy-to-use hardware and software. Arduino® boards are able to read inputs – a light-on sensor, a finger on a button, or a Twitter message – and turn it into an output – activating a motor, turning on an LED, and publishing something online. You can tell your board what to do by sending a set of instructions to the microcontroller on the board. To do so, you use the Arduino programming language (based on Wiring) and the Arduino® software IDE (based on Processing). Additional shields/modules/components are required for reading a Twitter message or publishing online. Surf to www.arduino.cc. for more information.

Product Overview

This air quality combo board senses the atmospheric quality by using the popular CCS811 and BME280 ICs. It provides a variety of environmental data including barometric pressure, humidity, temperature, TVOCs and equivalent CO2 (or eCO2) levels. Communication is possible through the I²C protocol. The CCS811 is an exceedingly popular sensor, providing readings for equivalent CO2 (or eCO2) in parts per million (ppm) and total volatile organic compounds (TVOC) in the parts per billion (ppb). The CCS811 also allows to fine-tune its readings if it has access to the current humidity and temperature.

Specifications

• operation voltage: 3.3 V
• eCO2 sensing: 400-8,192 ppm
• total volatile organic compound (TVOC): 0-1,187 ppm
• temperature range: -40 °C to 85 °C (-40 °F to 185 °F)
• humidity range: 0-100 % RH, ≤ 3 % from 20-80 %
• pressure range: 30,000-110,000 Pa
  • o relative accuracy: 12 Pa
  • o absolute accuracy: 100 Pa
• altitue range: 0-9.2 km (0-30,000 ft)
  • o relative accuracy: 1 m (3.3 ft) @ MSL
  • o 2 m (6.6 ft) @ 9.2 km (30,000 ft)
• dimensions:
  • length: 51 mm
  • width: 30.4 mm
  • height: 5.4 mm
• weight: 4.80 g

Features

• CCS811 and BME280 ICs
• eCO2 sensor
• TVOC sensor
• temperature sensor
• humidity sensor
• pressure sensor
• altitude sensor

Circuit Diagram

Connection to Arduino Pin Assignment

Using the Air Quality Sensor Module

We are going to use I²C communication with the BME280 and CSS811 sensor module. For that, connect the air quality sensor to the Arduino® Uno SDA and SCL pins, as shown in the following schematic diagram below or check the pin assignment table above.

Installing the BME280 and CCS811 Libraries

To get data readings from the air quality sensor board, you need to use the Sparkfun BME280 and CCS811 libraries. Follow the next steps to install the library in your Arduino® IDE. Open your Arduino® IDE and go to Sketch > Include Library > Manage Libraries. The Library Manager should open.

• Search for Sparkfun bme280 in the search box and install the library.
• Search for Sparkfun CCS811 in the search box and install the library.

Coding

To make sure everything is correctly wired, and the air quality sensor is working, download the example code from our product page:
https://whadda.com/product/air-quality-sensor-combo-board-wpse342/.You can download the code from the Downloads section or copy paste the code here below.

Now upload the code to your Arduino® Uno board. Make sure to select the correct board and COM port. Open the serial monitor with a baud rate of 115200, normally the basic sensor float data will be presented in the serial monitor. If everything is working properly, you will see a similar message on the serial monitor.

Code Explanation

Libraries:
The basic example code starts by including the required libraries to interface with the onboard sensors of the air quality sensor combo board. These are the standard Arduino® Wire library using the I²C interface, the Sparkfun BME280 and Sparkfun CCS811 library.

• include <Wire.h>
• include “SparkFunBME280.h”
• include “SparkFunCCS811.h”

I²C: We are using the I²C interface protocol by default. We need to create 2 objects: a BME280 object called myBME280, and a CCS811 object called myCCS811.

• BME280 myBME280;
• CCS811 myCCS811(CCS811_ADDR);

We initialize the CCS811 sensor with address 0x5B (standard).

• define CCS811_ADDR 0x5B

Setup
In Setup(), we start a serial communication at baud rate 115200.

• Serial.begin(115200);

Estimate the altitude in meters, based on the pressure at the sea level. Google sea level pressure map for more information.

• http://weather.unisys.com/surface/sfc_con.php?image=pr&inv=0&t=cur.
• https://www.atmos.illinois.edu/weather/tree/viewer.pl?launch/sfcslp.
• myBME280.setReferencePressure(101500); //Adjust the sea level pressure used for altitude calculations

Initializing the Sensors

BME280

if (myBME280.beginI2C() == false) //Begin communication over I2C {Serial. println(“BME280 sensor did not respond. Please check the wiring. Freezing…”); while(1); //Freeze}

CCS811
if (myCCS811.begin() == false){Serial. print(“CCS811 error did not respond. Please check the wiring. Freezing…”); while(1);}

Reading Data from the Sensors

BME280

• myBME280.readFloatHumidity()
• myBME280.readFloatPressure()
• myBME280.readFloatAltitudeMeters()
• myBME280.readFloatAltitudeFeet()
• myBME280.readTempF() // Show temp. in °Fahrenheit
• myBME280.readTempC() // Sowh temp. in °Celsius

CCS811

• myCCS811.getCO2()
• myCCS811.getTVOC()
• whadda.com.
• Modifications and typographical errors reserved – © Velleman Group nv. WPSE342_v01 Velleman Group nv, Legen Heirweg 33 – 9890 Gavere.

References

• SAIC | Digital Transformation
• Whadda - Exciting Electronics
• AIR QUALITY SENSOR COMBO BOARD - Whadda

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