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main.go
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main.go
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package main
import (
"context"
"flag"
"fmt"
"github.com/mrflynn/go-aqi"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"log"
"net/http"
"strings"
)
var (
listenAddr = flag.String("listen_addr", ":9166", "监听地址，默认 :9166")
serialPort = flag.String("serial_port", "/dev/ttyUSB0", "串口地址")
DeviceID = flag.String("device_id", "wclh", "设备id")
DeviceLocation = flag.String("device_locaiton", "home", "设备地理位置")
)
func main() {
flag.Parse()
SetupMetrics()
http.HandleFunc("/", httpIndexRequestHandler)
http.HandleFunc("/healthz", httpHealthzRequestHandler)
http.Handle("/metrics", promhttp.Handler())
SetupDevice(*serialPort)
dev, err := OpenDevice(*serialPort)
if err != nil {
log.Fatalf("Could not open '%v'", *serialPort)
}
defer dev.Close()
go receive(dev)
log.Printf("Serving metrics at http://localhost:%v/metrics", strings.Split(*listenAddr, ":")[1])
log.Fatal(http.ListenAndServe(*listenAddr, nil))
}
func receive(a *Device) {
log.Println("开始接收：", *serialPort)
ctx := context.Background()
// 持续读取和解析接收的串口数据
err := a.Process(ctx, DecodedSignal)
if err != nil {
log.Println(err)
}
}
// DecodedSignal 解码串口接收到的信号📶
func DecodedSignal(line string) (stop bool) {
stop = false
isData := false
if !strings.HasPrefix(line, ReceivePrefixStar) && !strings.HasPrefix(line, ReceivePrefixField) {
isData = true
}
if isData {
signal, err := ParserSignal(line)
if err != nil {
log.Println(err)
return
}
//log.Println(signal)
AssignmentMetrics(*signal)
}
return
}
// AssignmentMetrics 对prometheus metrics进行赋值
func AssignmentMetrics(s Signal) {
var labels = prometheus.Labels{
"sensor_id": *DeviceID,
"sensor_location": *DeviceLocation,
}
Temperature.With(labels).Set(s.Columns[0])
Humidity.With(labels).Set(s.Columns[1])
ChPm1dot0.With(labels).Set(s.Columns[2])
ChPm2dot5.With(labels).Set(s.Columns[3])
ChPm10.With(labels).Set(s.Columns[4])
UsPm1dot0.With(labels).Set(s.Columns[5])
UsPm2dot5.With(labels).Set(s.Columns[6])
UsPm10.With(labels).Set(s.Columns[7])
Gt0dot3um.With(labels).Set(s.Columns[8])
Gt0dot5um.With(labels).Set(s.Columns[9])
Gt1dot0um.With(labels).Set(s.Columns[10])
Gt2dot5um.With(labels).Set(s.Columns[11])
Gt5dot0um.With(labels).Set(s.Columns[12])
Gt10um.With(labels).Set(s.Columns[13])
if s.Model == "co2" {
Co2.With(labels).Set(s.Columns[14])
Hcho.With(labels).Set(s.Columns[15])
Tvoc.With(labels).Set(s.Columns[16])
}
if s.Model == "no_co2" {
Hcho.With(labels).Set(s.Columns[14])
Tvoc.With(labels).Set(s.Columns[15])
}
aqiResult, err := aqi.Calculate(aqi.PM25{Concentration: s.Columns[3]})
if err != nil {
fmt.Println(err)
return
}
Aqiatpm2dot5.With(labels).Set(aqiResult.AQI)
}
func httpHealthzRequestHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "OK")
}
func httpIndexRequestHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html")
w.Write([]byte(`<html>
<head><title>wclh_air_detector_exporter</title></head>
<body>
<h1>wclh_air_detector_exporter</h1>
<p><a href="metrics">Metrics</a></p>
<p><a href="healthz">Healthz</a></p>
<p><a href="https://github.com/wwek/wclh_air_detector_exporter" target="_blank">https://github.com/wwek/wclh_air_detector_exporter</a></p>
</body></html>`))
}