Winsen MH-Z16 이산화탄소 센서

설명

적외선 CO2 센서로 높은 민감도와 높은 분해능을 가지고 있다.

NDIR(Non-Dispersive Infrared)을 이용하여 공기중의 CO2를 검출한다.

온도센서가 내장되어 있어 온도 보정을 하며, UART로 센서 데이터를 출력한다.

공기 품질모니터링, 농업, 가축 사육장 등에서 사용이 가능.

Specifications

• Measuring the range of 0-2000 parts per million (PPM)
• Resolution of 1 PPM 0-2000 parts per million (PPM)
• Accuracy of 200 PPM
• A Warm – up time 3 minutes
• Response Time < 90s
• Operating temperature 0 to 50℃
• Operating Humidity 0% ~ 90% RH
• Storage temperature – 20-60℃
• Operating Voltage4.5 V to 6 V DC
• The Current maximum Current of less than 100 ma, the average Current of less than 50 ma
• Output mode UART

Pin Line

처음 가동시 센서의 예열 시간은 약 180초이다.

Reference¶

• 350~450ppm: General outdoor environment
• 350~1000ppm：The air is fresh and breathing smooth
• 1000~2000ppm：The air was stagnant and feel asleep
• 5000ppm：Permissible exposure limit for an 8h work day

DataSheet EN :   MH-Z16_CO2_datasheet_EN.pdf

참조 : http://wiki.seeedstudio.com/Grove-CO2_Sensor/

SourceCode

/* This test code is write for Arduino AVR Series(UNO, Leonardo, Mega) If you want to use with LinkIt ONE, please connect the module to D0/1 and modify: // #include <SoftwareSerial.h> // SoftwareSerial s_serial(2, 3); // TX, RX #define sensor Serial1 */ #include <SoftwareSerial.h> SoftwareSerial s_serial(2, 3); // TX, RX #define sensor s_serial const unsigned char cmd_get_sensor[] = { 0xff, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 }; unsigned char dataRevice[9]; int temperature; int CO2PPM; void setup() { sensor.begin(9600); Serial.begin(115200); Serial.println("get a 'g', begin to read from sensor!"); Serial.println("********************************************************"); Serial.println(); } void loop() { if(dataRecieve()) { Serial.print("Temperature: "); Serial.print(temperature); Serial.print(" CO2: "); Serial.print(CO2PPM); Serial.println(""); } delay(1000); } bool dataRecieve(void) { byte data[9]; int i = 0; //transmit command data for(i=0; i<sizeof(cmd_get_sensor); i++) { sensor.write(cmd_get_sensor[i]); } delay(10); //begin reveiceing data if(sensor.available()) { while(sensor.available()) { for(int i=0;i<9; i++) { data[i] = sensor.read(); } } } for(int j=0; j<9; j++) { Serial.print(data[j]); Serial.print(" "); } Serial.println(""); if((i != 9) || (1 + (0xFF ^ (byte)(data[1] + data[2] + data[3] + data[4] + data[5] + data[6] + data[7]))) != data[8]) { return false; } CO2PPM = (int)data[2] * 256 + (int)data[3]; temperature = (int)data[4] - 40; return true; }

실행화면

센서보정시 Code

// Grove - Co2 Sensor calibration #include <SoftwareSerial.h> SoftwareSerial sensor(A5, A4); // TX, RX const unsigned char cmd_calibrate[] = { 0xff, 0x87, 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf2 }; void setup() { sensor.begin(9600); Serial.begin(115200); Serial.println("begin to calibrate"); for(int i=0; i<sizeof(cmd_calibrate); i++) { sensor.write(cmd_calibrate[i]); } Serial.println("calibrate done"); } void loop() { // nothing to do