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//
// Copyright 2014-2023 Cristian Maglie. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
package serial_test
import (
"fmt"
"log"
"strings"
"go.bug.st/serial"
)
// This example prints the list of serial ports and use the first one
// to send a string "10,20,30" and prints the response on the screen.
func Example_sendAndReceive() {
// Retrieve the port list
ports, err := serial.GetPortsList()
if err != nil {
log.Fatal(err)
}
if len(ports) == 0 {
log.Fatal("No serial ports found!")
}
// Print the list of detected ports
for _, port := range ports {
fmt.Printf("Found port: %v\n", port)
}
// Open the first serial port detected at 9600bps N81
mode := &serial.Mode{
BaudRate: 9600,
Parity: serial.NoParity,
DataBits: 8,
StopBits: serial.OneStopBit,
}
port, err := serial.Open(ports[0], mode)
if err != nil {
log.Fatal(err)
}
// Send the string "10,20,30\n\r" to the serial port
n, err := port.Write([]byte("10,20,30\n\r"))
if err != nil {
log.Fatal(err)
}
fmt.Printf("Sent %v bytes\n", n)
// Read and print the response
buff := make([]byte, 100)
for {
// Reads up to 100 bytes
n, err := port.Read(buff)
if err != nil {
log.Fatal(err)
}
if n == 0 {
fmt.Println("\nEOF")
break
}
fmt.Printf("%s", string(buff[:n]))
// If we receive a newline stop reading
if strings.Contains(string(buff[:n]), "\n") {
break
}
}
}
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