main.cpp

#include "mbed.h"

Serial pc(USBTX, USBRX);

DigitalOut led1(LED1); // on board LED
DigitalOut led2(p11);
AnalogIn adc(p15);
float ain;

int main() {
    while(1) {
        led1 = !led1; // blink LED
        ain = adc;
        if(ain < 0.4) led2 = 1;
        else led2 = 0;
        pc.printf("%f\r\n", (float)ain);
        wait(0.3);
    }
}