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Golang DHT22 / AM2302 / DHT11 interface using periph.io driver
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MichaelS11/go-dht
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Golang DHT22 / AM2302 / DHT11 interface using periph.io driver
Please make sure to setup your DHT22 / AM2302 / DHT11 correctly. Do a search on the internet to find guide. Here is an example of a guide:
https://learn.adafruit.com/dht/connecting-to-a-dhtxx-sensor
The examples below are from using a Raspberry Pi 3 with GPIO 19 for the pin. Your setup may be different, if so, your pin names would need to change in each example.
Side note, in my testing the sensor has a fairly high level of read errors, suggest using ReadRetry or ReadBackground rather then just Read.
Tested on Raspberry Pi 3 with AM2302. Please open an issue if there are any issues.
go get github.com/MichaelS11/go-dht
package mainimport ("fmt""github.com/MichaelS11/go-dht")funcmain() {err:=dht.HostInit()iferr!=nil {fmt.Println("HostInit error:",err)return}dht,err:=dht.NewDHT("GPIO19",dht.Fahrenheit,"")iferr!=nil {fmt.Println("NewDHT error:",err)return}humidity,temperature,err:=dht.ReadRetry(11)iferr!=nil {fmt.Println("Read error:",err)return}fmt.Printf("humidity: %v\n",humidity)fmt.Printf("temperature: %v\n",temperature)}
package mainimport ("fmt""time""github.com/MichaelS11/go-dht")funcmain() {err:=dht.HostInit()iferr!=nil {fmt.Println("HostInit error:",err)return}dht,err:=dht.NewDHT("GPIO19",dht.Fahrenheit,"")iferr!=nil {fmt.Println("NewDHT error:",err)return}stop:=make(chanstruct{})stopped:=make(chanstruct{})varhumidityfloat64vartemperaturefloat64// get sensor reading every 20 seconds in backgroundgodht.ReadBackground(&humidity,&temperature,20*time.Second,stop,stopped)// should have at least read the sensor twice after 30 secondstime.Sleep(30*time.Second)fmt.Printf("humidity: %v\n",humidity)fmt.Printf("temperature: %v\n",temperature)// to stop ReadBackground after done with reading, close the stop channelclose(stop)// can check stopped channel to know when ReadBackground has stopped<-stopped}
package mainimport ("fmt""github.com/MichaelS11/go-dht")funcmain() {err:=dht.HostInit()iferr!=nil {fmt.Println("HostInit error:",err)return}dht,err:=dht.NewDHT("GPIO19",dht.Fahrenheit,"")iferr!=nil {fmt.Println("NewDHT error:",err)return}humidity,temperature,err:=dht.Read()iferr!=nil {fmt.Println("Read error:",err)return}fmt.Printf("humidity: %v\n",humidity)fmt.Printf("temperature: %v\n",temperature)}
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Golang DHT22 / AM2302 / DHT11 interface using periph.io driver