// +build ignore package main import ( "flag" "time" "github.com/kidoman/embd" "github.com/kidoman/embd/controller/hd44780" _ "github.com/kidoman/embd/host/all" ) func main() { flag.Parse() if err := embd.InitI2C(); err != nil { panic(err) } defer embd.CloseI2C() bus := embd.NewI2CBus(1) display, err := hd44780.NewI2CCharacterDisplay( bus, 0x20, hd44780.PCF8574PinMap, 20, 4, hd44780.TwoLine, hd44780.BlinkOn, ) if err != nil { panic(err) } defer display.Close() display.Clear() display.Message("Hello, world!\n@embd") time.Sleep(10 * time.Second) display.BacklightOff() }