gobot.io/x/gobot/v2@v2.1.0/examples/raspi_grove_pi_ultrasonic.go (about)

     1  //go:build example
     2  // +build example
     3  
     4  //
     5  // Do not build by default.
     6  
     7  package main
     8  
     9  import (
    10  	"fmt"
    11  	"time"
    12  
    13  	"gobot.io/x/gobot/v2"
    14  	"gobot.io/x/gobot/v2/drivers/i2c"
    15  	"gobot.io/x/gobot/v2/platforms/raspi"
    16  )
    17  
    18  const (
    19  	ultrasonicPin = "4"
    20  	delayMillisec = 10
    21  )
    22  
    23  func main() {
    24  	r := raspi.NewAdaptor()
    25  	gp := i2c.NewGrovePiDriver(r)
    26  
    27  	work := func() {
    28  		gobot.Every(1*time.Second, func() {
    29  			if val, err := gp.UltrasonicRead(ultrasonicPin, delayMillisec); err != nil {
    30  				fmt.Println(err)
    31  			} else {
    32  				fmt.Println("Distance [cm]", val)
    33  			}
    34  		})
    35  	}
    36  
    37  	robot := gobot.NewRobot("ultrasonicBot",
    38  		[]gobot.Connection{r},
    39  		[]gobot.Device{gp},
    40  		work,
    41  	)
    42  
    43  	robot.Start()
    44  }