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A Go package to allow you to read and write from the serial port as a stream of bytes.
It aims to have the same API on all platforms, including windows. As an added bonus, the windows package does not use cgo, so you can cross compile for windows from another platform.
You can cross compile with GOOS=windows GOARCH=386 go install github.com/tarm/serial
Currently there is very little in the way of configurability. You can set the baud rate. Then you can Read(), Write(), or Close() the connection. By default Read() will block until at least one byte is returned. Write is the same.
Currently all ports are opened with 8 data bits, 1 stop bit, no parity, no hardware flow control, and no software flow control. This works fine for many real devices and many faux serial devices including usb-to-serial converters and bluetooth serial ports.
You may Read() and Write() simulantiously on the same connection (from different goroutines).
package main
import (
"log"
"github.com/tarm/serial"
)
func main() {
c := &serial.Config{Name: "COM45", Baud: 115200}
s, err := serial.OpenPort(c)
if err != nil {
log.Fatal(err)
}
n, err := s.Write([]byte("test"))
if err != nil {
log.Fatal(err)
}
buf := make([]byte, 128)
n, err = s.Read(buf)
if err != nil {
log.Fatal(err)
}
log.Printf("%q", buf[:n])
}
By default the returned Port reads in blocking mode. Which means
Read() will block until at least one byte is returned. If that's not
what you want, specify a positive ReadTimeout and the Read() will
timeout returning 0 bytes if no bytes are read. Please note that this
is the total timeout the read operation will wait and not the interval
timeout between two bytes.
c := &serial.Config{Name: "COM45", Baud: 115200, ReadTimeout: time.Second * 5}
// In this mode, you will want to suppress error for read
// as 0 bytes return EOF error on Linux / POSIX
n, _ = s.Read(buf)
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