Hi, I've got a D32 Pro and have connected four LEDs to pins 0, 2, 14 and 15 as PWM pins. I noticed after that when I plugged the microUSB into the D32 Pro, the green LED only on pin 0 would flash then go off. I can then run the Arduino code for fading all of them, all good. I then implemented deep s...

As you are running the code on two different boards, on the devkit COM port serial window, make sure that the serial speed in the code and the one selected at the bottom of that window match, otherwise you'll either see nothing of garbage.