Raspberry pi GPIO test golang

gpio-test.go

package main

import (
	"log"
	"os"
	"time"

	"github.com/stianeikeland/go-rpio/v4"
)

var (
	ticketPin    rpio.Pin
	loop1Pin     rpio.Pin
	loop2Pin     rpio.Pin
	emergencyPin rpio.Pin

	logger = log.New(os.Stdout, "[GPIO]: ", log.Ldate|log.Ltime)
)

func main() {
	/*
	   loop1: 27
	   loop2: 18
	   relay1: 23
	   relay2: 24
	   emergency: 17
	   ticket: 4
	*/

	_loop1 := 27
	_loop2 := 18
	_emergency := 17
	_ticket := 4

	// Open and map memory to access gpio, check for errors
	if err := rpio.Open(); err != nil {
		logger.Println(err)
		os.Exit(1)
	}

	logger.Println("PINOUT LIST:")
	logger.Printf("Loop 1: %d\n", _loop1)
	logger.Printf("Loop 2: %d\n", _loop2)
	logger.Printf("Emerfency: %d\n", _emergency)
	logger.Printf("Ticket: %d\n", _ticket)
	logger.Println("Sleep for 2 sec.")

	time.Sleep(2 * time.Second)

	// initiaalize
	loop1Pin = rpio.Pin(_loop1)
	loop2Pin = rpio.Pin(_loop2)
	emergencyPin = rpio.Pin(_emergency)
	ticketPin = rpio.Pin(_ticket)

	emergencyPin.PullUp()
	ticketPin.PullUp()
	loop1Pin.PullUp()
	loop2Pin.PullUp()

	for {
		loop1value := rpio.State(loop1Pin.Read())
		loop2value := rpio.State(loop2Pin.Read())
		emergencyValue := rpio.State(emergencyPin.Read())
		ticketValue := rpio.State(ticketPin.Read())

		logger.Printf(
			"Loop1: %v | Loop2 : %v | Emergency: %v | Ticket : %v\n",
			loop1value,
			loop2value,
			emergencyValue,
			ticketValue,
		)
		time.Sleep(100 * time.Millisecond)
	}
}