func main() {
if err := embd.InitW1(); err != nil {
panic(err)
}
defer embd.CloseW1()
w1 := embd.NewW1Bus(0)
devs, err := w1.ListDevices()
if err != nil {
panic(err)
}
var name string = ""
for _, dev := range devs {
if strings.HasPrefix(dev, "28-") {
name = dev
break
}
}
if name == "" {
fmt.Println("No DS18B20 devices found")
}
fmt.Printf("Using DS18B20 device %s\n", name)
w1d, err := w1.Open(name)
if err != nil {
panic(err)
}
sensor := ds18b20.New(w1d)
err = sensor.SetResolution(ds18b20.Resolution_12bit)
fmt.Println("Using 12-bit resolution")
if err != nil {
panic(err)
}
var timer time.Time
for i := 0; i < 10; i++ {
timer = time.Now()
err = sensor.ReadTemperature()
if err != nil {
fmt.Printf("error %v\n", err)
embd.CloseW1()
time.Sleep(time.Second)
w1 = embd.NewW1Bus(0)
w1d, err = w1.Open(name)
if err != nil {
panic(err)
}
sensor = ds18b20.New(w1d)
continue
}
fmt.Printf("%d milliseconds for conversion\n", time.Since(timer).Nanoseconds()/1000000)
fmt.Printf("Measured temperature: %vC\n", sensor.Celsius())
fmt.Printf("Measured temperature: %vF\n", sensor.Fahrenheit())
}
err = sensor.SetResolution(ds18b20.Resolution_9bit)
fmt.Println("Using 9-bit resolution")
if err != nil {
panic(err)
}
for i := 0; i < 10; i++ {
timer = time.Now()
err = sensor.ReadTemperature()
if err != nil {
fmt.Printf("error %v\n", err)
embd.CloseW1()
time.Sleep(time.Second)
w1 = embd.NewW1Bus(0)
w1d, err = w1.Open(name)
if err != nil {
panic(err)
}
sensor = ds18b20.New(w1d)
continue
}
fmt.Printf("%d milliseconds for conversion\n", time.Since(timer).Nanoseconds()/1000000)
fmt.Printf("Measured temperature: %vC\n", sensor.Celsius())
fmt.Printf("Measured temperature: %vF\n", sensor.Fahrenheit())
}
}
func main() {
if err := embd.InitW1(); err != nil {
panic(err)
}
defer embd.CloseW1()
w1 := embd.NewW1Bus(0)
devs, err := w1.ListDevices()
if err != nil {
panic(err)
}
for _, dev := range devs {
fmt.Printf("OneWire device: %s\n", dev)
}
w1d, err := w1.Open("28-011572120bff")
if err != nil {
panic(err)
}
fmt.Printf("%v\n", w1d)
err = w1d.WriteByte(0x44)
if err != nil {
panic(err)
}
for ret, err := w1d.ReadByte(); ret == 0 && err != nil; {
}
if err != nil {
panic(err)
}
err = w1d.WriteByte(0xBE)
if err != nil {
panic(err)
}
res, err := w1d.ReadBytes(9)
if err != nil {
panic(err)
}
fmt.Print("res: ")
for _, val := range res {
fmt.Printf("0x%02X ", val)
}
fmt.Println()
var temp float64 = float64(float64(res[1])*256.+float64(res[0])) / 16.
fmt.Printf("%f\n", temp)
fmt.Println("Done")
}