Begin new exporter for Geekworm x728

Author: zachfi

cmd/ups_exporter/main.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"os"
+
+	rpio "github.com/stianeikeland/go-rpio/v4"
+
+	"github.com/xaque208/znet/pkg/util"
+
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+
+	"github.com/go-daq/smbus"
+)
+
+type PowerState int64
+
+const (
+	Powered   PowerState = 0
+	Unpowered            = 1
+)
+
+func main() {
+
+	logger := util.NewLogger()
+
+	err := rpio.Open()
+	if err != nil {
+		_ = level.Error(logger).Log("msg", "failed to open gpio", "err", err)
+		os.Exit(1)
+	}
+
+	_ = level.Info(logger).Log("msg", "battery", "percent", batteryPercent(logger))
+	_ = level.Info(logger).Log("msg", "power", "state", powerState(logger))
+}
+
+func batteryPercent(logger log.Logger) float64 {
+	var max float64 = 255
+
+	c, err := smbus.Open(1, 0x36)
+	if err != nil {
+		_ = level.Error(logger).Log("msg", "failed to open smbus", "err", err)
+		os.Exit(1)
+	}
+	defer c.Close()
+
+	v, err := c.ReadReg(0x36, 0x1)
+	if err != nil {
+		_ = level.Error(logger).Log("msg", "failed to read register", "err", err)
+		os.Exit(1)
+	}
+
+	return (float64(v) / max) * 100
+}
+
+func powerState(logger log.Logger) PowerState {
+	// Power Loss Detection (PLD) pin 6
+	pin := rpio.Pin(6)
+	pin.Input()
+	s := pin.Read()
+
+	if s == 0 {
+		return Powered
+	}
+
+	// Make a noise when there is no power.
+	// buzzer := rpio.Pin(20)
+	// buzzer.Output()
+	// buzzer.Write(rpio.High)
+	// time.Sleep(time.Millisecond * 500)
+	// buzzer.Write(rpio.Low)
+
+	return Unpowered
+}

go.mod

@@ -0,0 +1,12 @@
+module github.com/xaque208/geekworm_exporter
+
+go 1.18
+
+require (
+	github.com/go-daq/smbus v0.0.0-20201216173259-5725b4593606
+	github.com/go-kit/log v0.2.1
+	github.com/stianeikeland/go-rpio/v4 v4.6.0
+	github.com/xaque208/znet v0.31.5
+)
+
+require github.com/go-logfmt/logfmt v0.5.1 // indirect