sds011.go

package main

import (
	"fmt"
	"strconv"
	"time"

	"github.com/tarm/serial"
)

//Based on https://github.com/piotr-sikora-v/sds011-golang

func main() {
	c := &serial.Config{Name: "/dev/ttyUSB0", Baud: 9600}

	buf := make([]byte, 10)
	for {
		s, err := serial.OpenPort(c)

		if err != nil {
			panic(err)
		}

		_, err = s.Read(buf)
		if err != nil {
			panic(err)
		}
		now := time.Now()
		fmt.Println(now.Format(time.RFC822))
		low25, err := strconv.ParseInt(fmt.Sprintf("%d", buf[2]), 10, 32)
		high25, err := strconv.ParseInt(fmt.Sprintf("%d", buf[3]), 10, 32)
		calc25 := ((high25 * 256) + low25) / 10
		fmt.Print("pm2.5: ")
		fmt.Println(calc25)
		low10, err := strconv.ParseInt(fmt.Sprintf("%d", buf[4]), 10, 32)
		high10, err := strconv.ParseInt(fmt.Sprintf("%d", buf[5]), 10, 32)
		calc10 := ((high10 * 256) + low10) / 10
		fmt.Print("pm10: ")
		fmt.Println(calc10)
		s.Close()
		time.Sleep(5 * time.Minute)
	}
}