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#include <iostream><br>
#include <wiringPi.h> //only needed for the one sec delay
#include <wiringSerial.h> //only needed for serialOpen
#include <unistd.h> // needed for read and write
using namespace std;
int main()
{
int fd; // Handler ID
if ((fd = serialOpen ("/dev/serial0", 9600)) < 0) // uses wiringSerial
{
cout<< "Unable to open device";
return 1 ;
} else
{
cout <<"ttyAMA0 initialised ok\n";
}
char cmd[9] = {0xFF,0x01,0x86,0x00,0x00,0x00,0x00,0x00,0x79};
char cmd2[9];
cout << "CO2 UART is running\n";
while(1)
{
delay(1000);
write (fd,cmd,9); //write 9 bytes in cmd to UART
read(fd,cmd2,9); //read 9 bytes to cmd2 from UART
for (int loop=0;loop<=8;loop++)
cout << (int)cmd2[loop] << "\t "; // print all 9 bytes with decimal output
cout << "\n";
for (int loop=0;loop<=8;loop++)
cout << std::hex << (int)cmd2[loop] << std::dec << "\t "; //hex valures for all 9 bytes read
cout << "\n";
int High = (int) cmd2[2];
int Low = (int) cmd2[3];
int ppm = (256*High)+Low; //ppm = (256*byte2)+byte3 remember bytes numbered 0-8
cout << "\nhigh " << High << "\t low " << Low << "\tppm = " << ppm << "\n";
cout << "--------------------------------------------------------------------\n";
}
return 0;
}
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