Page 87 - Programming the Photon Getting Started With the Internet of Things
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Figure 4.8 LED connected to the analog pin on the Photon board.
Because we are using the analog pin on the Photon board, we need to use a function
called analogWrite() to generate the PWM signal and change the brightness of the LED.
The analog pins on the Photon board are 8-bit values, which means you can write values
from 0 to 255, as shown in the following:
int ledPin = A0;
void setup() {
// nothing happens in setup
pinMode(ledPin, OUTPUT);
}
void loop() {
// fade in from min to max in increments of 5 points:
