A Go library for controlling Samsung TVs through the EX-Link serial port included on most models.
The EX-Link connection is 3.5mm stereo jack identical to a standard headphone connector. In order to connect your TV to a computer, you'll need a 3.5mm stereo jack to serial adapter along with a serial to USB adapter such as the Keyspan USA-19H or IOGEAR GUC232A. These models have been tested successfully to control 2011 and 2015 model year Samsung TVs from both a Raspberry Pi 3 and a MacBook Pro.
The EX-Link protocol consists of byte codes sent through the serial connection that can control the majority of Samsung TV features, settings, and remote control buttons. See exlink.go for the list of codes that this library supports.
Call exlink.Open with the path to your serial port such as /dev/ttyUSB0 or /dev/tty.KeySerial1. Then call various functions to control the TV. Sleeps have been included between function calls in the example below to allow you to see the results of the commands through your TV's on-screen display.
package main
import (
"github.com/mgoff/go-samsung-exlink"
"log"
"time"
)
func main() {
// open the connection to the EX-Link device
device, err := exlink.Open("/dev/ttyUSB0")
if err != nil {
log.Fatal(err)
}
// close the connection at the end
defer device.Close()
// turn on the EX-Link device
err = device.PowerOn()
if err != nil {
log.Fatal(err)
}
time.Sleep(10 * time.Second)
// switch to HDMI 1
err = device.SourceHDMI1()
if err != nil {
log.Fatal(err)
}
time.Sleep(10 * time.Second)
// switch to HDMI 2
err = device.SourceHDMI2()
if err != nil {
log.Fatal(err)
}
time.Sleep(10 * time.Second)
// turn off the EX-Link device
err = device.PowerOff()
if err != nil {
log.Fatal(err)
}
}