I2C address scanner for mbed os

mbed_i2c_scanner.cpp

#include <mbed.h>

I2C i2c(PB_11, PB_10); // SDA pin, SCL pin
Serial pc(PB_6, PB_7); // TX pin, RX pin

int main()
{
	pc.baud(115200);
	wait_ms(2000);
	pc.printf("Hello World!\n");

	int count = 0;
	for (int address = 0; address < 127; address++)
	{
		if (!i2c.write(address << 1, NULL, 0)) // 0 returned is ok
		{																								  
			pc.printf("I2C device found at address 0x%02X (0x%02X in 8-bit)\n", address, address << 1);
			count++;
		}
		wait_ms(20);
	}
	if (count)
		pc.printf("%d", count);
	else
		pc.printf("No");
	pc.printf(" device found\n\n");
}