Arduino uno Application Note

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©16March2017CO2Meter,Inc.AllRightsReserved 1
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ApplicationNoteAN‐157:
ArduinoUARTInterfacetoTelAireT6613CO2Sensor
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Introduction
TheArduinoUNO,MegaandMega2560areidealmicrocontrollersfor
readingCO2sensors.Arduinoboardsareusefulforabeginnerlevel
projectuptointegrationintoacompletesensorproduct.TheArduinoto
sensorinterfaceisvia19,200BAUDserialTXD‐RXDconnection.
IfyouarenewtoArduino,theselowcostdevelopmentboardsare
availablefrommanysources.Werecommendyoustartwithauthentic
Arduinoproducts.
TheAmphenolTelAireT6613CO2Sensorisanon‐dispersiveinfrared
(NDIR)carbondioxidesensorfactorycalibratedtomeasureCO2levels
upto2,000ppm(0.2%).ItisoneofthemostpopularC02sensorsever
produced.Thedualchanneldesigneliminatestheneedforcalibration
inmostapplications.Itsflexibleinterfaceisdesignedtobeeasily
connectedtoanArduinoorsimilarmicrocontroller.Thesensor
requires5VDC,180mApeakcurrentand33mAaveragecurrent.
RuntheArduinoBlinkExample
ThebestwaytobecomefamiliarwiththeArduinoGraphicalUser’sInterface(GIU)istocreatean
ArduinoprojectandruntheexampleBlink.Thissimpletestprogramconfirmsthatanumberof
connectiondetailsandthattheGUIareworkingproperly.
Caution:DonotconnectyourArduinoboardtoyourcomputer’sUSBportuntiltheArduinosoftware
isinstalled.OtherwiseWindowswouldinstallagenericdriver,notdesiredhere.
Step1:InstallArduinosoftwareonyourcomputer.FromthispageselecttheWindowsInstaller.
https://www.arduino.cc/en/Main/Software
Step2:ToruntheBlinkexamplefollowtheseinstructions:https://www.arduino.cc/en/Tutorial/Blink
NotethattheMEGAArduinoshaveaLEDonboard.TheArduinoUNOmayrequireaLEDandresistor
beaddedasspecifiedinthetutorial.
OnceBlinkrunsproperly,youcanconnectthesensor.

Arduino uno Specifications

General

Form factor	Arduino
Certification	RoHS, FC, CE
Processor model	-
Processor frequency	- MHz
Microcontroller model	ATmega328
Microcontroller frequency	16 MHz
DC input voltage	7-12 V
Operating voltage	5 V
DC current per I/O pin	40 mA
Flash memory	0.032 MB
Maximum internal memory	- GB
SRAM (Static Random Access Memory)	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)	1 KB
Wi-Fi	No
Number of analog I/O pins	6
Number of digital I/O pins	14

Weight and Dimensions

Board dimensions	53.4 x 68.6 mm