Gravity: UART Infrared CO2 Sensor (0-50000ppm) - แท้ DFRobot

Gravity CO2 Sensor Selection Guide
Product Name	Gravity:  Analog        Electrochemistry CO2 Sensor	Gravity: Analog IR CO2 Sensor	Gravity: UART IR CO2 Sensor
SKU	SG40379	SG20379	SG30379
Operation Voltage	3.7～5V	4.5～5.5V	4.5～5.5V
Output	Gravity: Analog (Analog2.7～4.1V) +  3P Header Digital Output(Alarm):0～VCC Level	Gravity: Analog  (Analog Output 0.4～2V)	Gravity: UART (0～3.3V Level)
Measurement Principle	Electrochemistry (Solid electrolyte battery principle)	NDIR(non-dispersive infrared)	NDIR(non-dispersive infrared)
Measurement Range	0～10000 ppm	0～5000 ppm	0～50000 ppm
Accuracy	±100ppm@400ppm	±(100ppm + 6% readings)	±(100ppm + 6% readings)
Response Time	<20s	<90s	<30s
Average Power	<1W	<430mW@5V	<430mW@5V
Operation Temperature	-20℃～50℃	0℃～50℃	0℃～50℃
Operation Humidity	0～95% RH (No condensation)	0～95% RH (No condensation)	0～95% RH (No condensation)
Lifespan	>1 years	>5 years	>5 years
Dimension (PCB)	32*42 mm	37*69 mm	21*27.1 mm
Features	1.Large Range 2.Adjustable Alarm Threshold 3.Fast Response 4.Analog Output	1.High Accuracy 2.Long Lifespan 3.Auto Temperature Compensation 4.Water Vapor Interference Resistance 5.Analog Output	1.High Accuracy 2.Large Range 3.Long Lifespan 4.Auto Temperature Compensation 5.Water Vapor Interference Resistance 6.3.3V UART Output

• High sensitivity High resolution
• Low power consumption
• Excellent stability
• Temperature compensation
• Excellent linear output
• High cycle life
• Anti-water vapor interference
• No poisoning
• Need 5V power supply, even you are using a 3.3V microcontroller, like Raspberry Pi .etc.

• Gas Detection: Carbon Dioxide (CO2)
• Operating Voltage: 4.5 ~ 5.5V DC
• Average Current: <85mA
• Output Signal: UART/PWM/Analog output (the last two has not been developed)
• Measuring Range: 0 ~ 50000ppm
• Accuracy: ± (50ppm + 5% reading)
• Preheating Time: 3min
• Response Time: T90 < 30s
• Operating Temperature: 0 ~ 50 ℃
• Operating Humidity: 0 ~ 95% RH (no condensation)
• Service Life: >5 years
• Board Dimension : 21 * 27.11 mm/ 0.83 * 1.06 inches
• Weight: 42g

• Product wiki 
• More Documents 

• UART Infrared CO2 Sensor Probe (0-50000ppm) x1
• Sensor Converter Board x1
• 6-Pin Sensor Cable x1
• PH2.0 Gravity UART Cable x1
• XH2.54 4-Pin header x1

Board Overview

Tutorial

Upload the code to Arduino Uno, open the serial monitor to check the CO2 concentration.

Requirements

• Hardware
• DFRduino UNO x 1.
• Gravity UART Infrared CO2 Sensor
• DuPont cables
• Software
• Arduino IDE Click to Download Arduino IDE from Arduino.

Connection Diagram

Sample Code

/***************************************************
* Infrared CO2 Sensor 0-50000ppm(Wide Range)
* ****************************************************
* The follow example is used to detect CO2 concentration.

* @author lg.gang(lg.gang@qq.com)
* @version V1.0
* @date 2016-6-6

* GNU Lesser General Public License.
* See <http://www.gnu.org/licenses/> for details.
* All above must be included in any redistribution
* ****************************************************/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
unsigned char hexdata[9] = {0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79}; //Read the gas density command /Don't change the order
void setup() {

Serial.begin(9600);
while (!Serial) {

}
mySerial.begin(9600);

}

void loop() {
mySerial.write(hexdata,9);
delay(500);

for(int i=0,j=0;i<9;i++)
{
if (mySerial.available()>0)
{
long hi,lo,CO2;
int ch=mySerial.read();

if(i==2){ hi=ch; } //High concentration
if(i==3){ lo=ch; } //Low concentration
if(i==8) {
CO2=hi*256+lo; //CO2 concentration
Serial.print("CO2 concentration: ");
Serial.print(CO2);
Serial.println("ppm");
}

}

}

}

Expected Results

Open your IDE serial monitor and wait for about 3 minutes (preheat process), then you'll see the finial data. (Indoor Temperature: 25℃)