func main() {
i2c, err := device.NewI2C(0x27, 2)
checkError(err)
defer i2c.Close()
lcd, err := device.NewLcd(i2c, device.LCD_16x2)
checkError(err)
err = lcd.BacklightOn()
checkError(err)
m := &sync.Mutex{}
blink := false
go func() {
//writeTime(lcd, time.Now(), blink, m)
c := time.Tick(1 * time.Second)
for t := range c {
writeTime(lcd, t, blink, m)
blink = !blink
}
}()
for {
temp, hum, _, err := sensor.ReadDHTxxWithRetry(sensor.DHT11, 4, 5, true)
if err == nil {
m.Lock()
lcd.ShowMessage(fmt.Sprintf("T: %v*C Hum: %v%%", temp, hum),
device.SHOW_LINE_2|device.SHOW_ELIPSE_IF_NOT_FIT)
m.Unlock()
} else {
m.Lock()
lcd.ShowMessage("DHTxx read error",
device.SHOW_LINE_2|device.SHOW_ELIPSE_IF_NOT_FIT)
m.Unlock()
}
time.Sleep(10 * time.Second)
}
}
func main() {
i2c, err := device.NewI2C(0x27, 2)
checkError(err)
defer i2c.Close()
lcd, err := device.NewLcd(i2c, device.LCD_20x4)
checkError(err)
err = lcd.BacklightOn()
checkError(err)
err = lcd.ShowMessage("--=! Let's rock !=--", device.SHOW_LINE_1)
checkError(err)
err = lcd.ShowMessage("Welcome to RPi dude!", device.SHOW_LINE_2)
checkError(err)
err = lcd.ShowMessage("I'm lazy to be lazy.", device.SHOW_LINE_3)
checkError(err)
err = lcd.ShowMessage("R2D2, where are you?", device.SHOW_LINE_4)
checkError(err)
time.Sleep(5 * time.Second)
for i := 0; i <= 12; i++ {
var buf bytes.Buffer
for j := 0; j <= 19; j++ {
buf.Write([]byte{byte(i*20 + j)})
}
err = lcd.ShowMessage(buf.String(), device.SHOW_LINE_1)
checkError(err)
time.Sleep(1 * time.Second)
}
time.Sleep(5 * time.Second)
err = lcd.TestWriteCGRam()
checkError(err)
for i := 0; i <= 12; i++ {
var buf bytes.Buffer
for j := 0; j <= 19; j++ {
buf.Write([]byte{byte(i*20 + j)})
}
err = lcd.ShowMessage(buf.String(), device.SHOW_LINE_1)
checkError(err)
time.Sleep(1 * time.Second)
}
lcd.Clear()
for {
lcd.Home()
t := time.Now()
lcd.SetPosition(1, 0)
fmt.Fprint(lcd, t.Format("Monday Jan 2"))
lcd.SetPosition(2, 1)
fmt.Fprint(lcd, t.Format("15:04:05 2006"))
// lcd.SetPosition(4, 0)
// fmt.Fprint(lcd, "i2c, VGA, and Go")
time.Sleep(666 * time.Millisecond)
}
}
func main() {
i2c, err := device.NewI2C(0x27, 2)
check(err)
defer i2c.Close()
lcd, err := device.NewLcd(i2c, device.LCD_16x2)
check(err)
lcd.BacklightOn()
lcd.Clear()
for {
lcd.Home()
t := time.Now()
lcd.SetPosition(0, 0)
fmt.Fprint(lcd, t.Format("Monday Jan 2"))
lcd.SetPosition(1, 0)
fmt.Fprint(lcd, t.Format("15:04:05 2006"))
// lcd.SetPosition(4, 0)
// fmt.Fprint(lcd, "i2c, VGA, and Go")
time.Sleep(333 * time.Millisecond)
}
}
func main() {
i2c, err := device.NewI2C(0x27, 2)
checkError(err)
defer i2c.Close()
lcd, err := device.NewLcd(i2c, device.LCD_20x4)
checkError(err)
err = lcd.BacklightOn()
checkError(err)
var msg = []string{
"--=! Let's rock !=--",
"Welcome to RPi dude!",
"I'm lazy to be lazy.",
"R2D2, where are you?",
}
lines := []device.ShowOptions{device.SHOW_LINE_1, device.SHOW_LINE_2,
device.SHOW_LINE_3, device.SHOW_LINE_4}
i := 0
for {
var j byte
for j = 0; j < 4; j++ {
k := (i + int(j)) % 4
err = lcd.ShowMessage(msg[k], lines[j])
checkError(err)
}
time.Sleep(2 * time.Second)
for j = 0; j < 4; j++ {
err = lcd.ShowMessage(strings.Repeat(" ", 20), lines[j])
checkError(err)
}
err = lcd.BacklightOff()
checkError(err)
time.Sleep(2 * time.Second)
err = lcd.BacklightOn()
checkError(err)
i++
}
}
func main() {
i2c, err := device.NewI2C(0x27, 2)
checkError(err)
defer i2c.Close()
lcd, err := device.NewLcd(i2c, device.LCD_16x2)
checkError(err)
err = lcd.BacklightOn()
checkError(err)
/* var msg = []string{
"--=! Let's rock !=--",
"Welcome to RPi dude!",
"I'm lazy to be lazy.",
"R2D2, where are you?",
}*/
err = lcd.ShowMessage("Hello world !!! How are you? How are you",
device.SHOW_LINE_1|device.SHOW_LINE_2|
device.SHOW_ELIPSE_IF_NOT_FIT|device.SHOW_BLANK_PADDING)
checkError(err)
time.Sleep(3 * time.Second)
err = lcd.ShowMessage("Welcome to RPi!!!",
device.SHOW_LINE_1|device.SHOW_LINE_2|
device.SHOW_ELIPSE_IF_NOT_FIT|device.SHOW_BLANK_PADDING)
checkError(err)
}