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package main
import (
"flag"
"io"
"log"
"os"
"time"
"github.com/goburrow/serial"
)
var (
address string
baudrate int
databits int
stopbits int
parity string
message string
)
func main() {
flag.StringVar(&address, "a", "/dev/ttyUSB0", "address")
flag.IntVar(&baudrate, "b", 115200, "baud rate")
flag.IntVar(&databits, "d", 8, "data bits")
flag.IntVar(&stopbits, "s", 1, "stop bits")
flag.StringVar(&parity, "p", "N", "parity (N/E/O)")
flag.StringVar(&message, "m", "serial", "message")
flag.Parse()
config := serial.Config{
Address: address,
BaudRate: baudrate,
DataBits: databits,
StopBits: stopbits,
Parity: parity,
Timeout: 30 * time.Second,
}
log.Printf("connecting %+v", config)
port, err := serial.Open(&config)
if err != nil {
log.Fatal(err)
}
log.Println("connected")
defer func() {
err := port.Close()
if err != nil {
log.Fatal(err)
}
log.Println("closed")
}()
if _, err = port.Write([]byte(message)); err != nil {
log.Fatal(err)
}
if _, err = io.Copy(os.Stdout, port); err != nil {
log.Fatal(err)
}
}
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