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Kód: Vybrat vše

//#include <SoftwareSerial.h>; to si vymaž

//SoftwareSerial mySerial(A3, A4); // prvni TX , druhy - RX  to taky vymazat

byte cmd[9] = {0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79}; 
unsigned char response[9];

void setup() {
Serial.begin(9600);
Serial2.begin(9600); // zmeneno
}

void loop() 
{
Serial2.write(cmd, 9); //změneno z mySerial na  Serial2 , je nutne dodrzet velikost pismen, serial.begin(9600) neni Serial.begin(9600);
memset(response, 0, 9);
Serial2.readBytes(response, 9); //změneno 
int i;
byte crc = 0;
for ( i = 1; i < 8; i++) crc+=response[i];  //tady ti chybi [i],protoze tento web editor to nezobrazuje
crc = 255 - crc;
crc++;

if ( !(response[0] == 0xFF && response[1] == 0x86 && response[8] == crc) ) {
Serial.println("CRC error: " + String(crc) + " / "+ String(response[8]));
} else {
unsigned int responseHigh = (unsigned int) response[2];
unsigned int responseLow = (unsigned int) response[3];
unsigned int ppm = (256*responseHigh) + responseLow;
int x = ppm;
float y = x/1000.00;

unsigned int teplota = (unsigned int) response[4];
int a = teplota;
float b = a-40;

Serial.print ("koncentrace CO2: ");
Serial.print(ppm);
Serial.print(" PPM ");
Serial.print(y);
Serial.println("%");
Serial.print("teplota: ");
Serial.print(b);
Serial.println(" stupnu Celsia");

}
delay(5000);
}