firmata_led_brightness.go

//go:build example
// +build example

//
// Do not build by default.

/*
 How to run
 Pass serial port to use as the first param:

	go run examples/firmata_led_brightness.go /dev/ttyACM0
*/

package main

import (
	"os"
	"time"

	"gobot.io/x/gobot/v2"
	"gobot.io/x/gobot/v2/drivers/gpio"
	"gobot.io/x/gobot/v2/platforms/firmata"
)

func main() {
	firmataAdaptor := firmata.NewAdaptor(os.Args[1])
	led := gpio.NewLedDriver(firmataAdaptor, "3")

	work := func() {
		brightness := uint8(0)
		fadeAmount := uint8(15)

		gobot.Every(100*time.Millisecond, func() {
			led.Brightness(brightness)
			brightness = brightness + fadeAmount
			if brightness == 0 || brightness == 255 {
				fadeAmount = -fadeAmount
			}
		})
	}

	robot := gobot.NewRobot("pwmBot",
		[]gobot.Connection{firmataAdaptor},
		[]gobot.Device{led},
		work,
	)

	robot.Start()
}