1 files changed, 345 insertions, 0 deletions
diff --git a/go-sysmon/main.go b/go-sysmon/main.go
new file mode 100644
index 0000000..580f27d
--- /dev/null
+++ b/go-sysmon/main.go
@@ -0,0 +1,345 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync/atomic"
+	"syscall"
+	"time"
+
+	"github.com/shirou/gopsutil/v4/cpu"
+	"github.com/shirou/gopsutil/v4/host"
+	"github.com/shirou/gopsutil/v4/mem"
+	"go.bug.st/serial"
+)
+
+type Config struct {
+	SerialPort     string
+	BaudRate       int
+	ConnectionWait time.Duration
+	SendInterval   time.Duration
+	ReconnectDelay time.Duration
+	CPUTempPath    string
+	Debug          bool
+}
+
+type SystemMetrics struct {
+	CPUTemp       int
+	CPUUsage      int
+	RAMTotal      int
+	RAMAvailable  int
+	OSName        string
+	KernelVersion string
+	Uptime        string
+	Time          string
+}
+
+type MetricsCollector struct {
+	cpuUsage      atomic.Int32
+	ramTotal      int
+	osName        string
+	kernelVersion string
+	cpuTempPaths  []string
+	cpuTempCache  atomic.Int32
+	lastTempCheck atomic.Int64
+	ctx           context.Context
+	cancel        context.CancelFunc
+}
+
+type SerialManager struct {
+	cfg       *Config
+	collector *MetricsCollector
+}
+
+func loadConfig() *Config {
+	cfg := &Config{
+		BaudRate:       115200,
+		ConnectionWait: 6 * time.Second,
+		SendInterval:   3 * time.Second,
+		ReconnectDelay: 5 * time.Second,
+		CPUTempPath:    os.Getenv("CPU_TEMP_PATH"),
+		Debug:          os.Getenv("DEBUG") == "1" || os.Getenv("DEBUG") == "true",
+	}
+
+	if env := os.Getenv("SERIAL_PORT"); env != "" {
+		cfg.SerialPort = env
+	} else if runtime.GOOS == "windows" {
+		cfg.SerialPort = "COM3"
+	} else {
+		cfg.SerialPort = "/dev/arduino"
+	}
+
+	return cfg
+}
+
+var debugEnabled bool
+
+func log(level, format string, args ...interface{}) {
+	if level == "DEBUG" && !debugEnabled {
+		return
+	}
+	timestamp := time.Now().Format("15:04:05")
+	fmt.Printf("[%s] [%s] %s\n", timestamp, level, fmt.Sprintf(format, args...))
+}
+
+func (m *SystemMetrics) Format() string {
+	return fmt.Sprintf(
+		"\nCpuTemp=%d,CpuUsage=%d,RamMax=%d,RamFree=%d,Time=%s,OS=%s,Kernel=%s,Uptime=%s",
+		m.CPUTemp, m.CPUUsage, m.RAMTotal, m.RAMAvailable,
+		m.Time, m.OSName, m.KernelVersion, m.Uptime,
+	)
+}
+
+func NewMetricsCollector(cfg *Config) (*MetricsCollector, error) {
+	ctx, cancel := context.WithCancel(context.Background())
+	mc := &MetricsCollector{
+		ctx:    ctx,
+		cancel: cancel,
+	}
+
+	mc.osName = getOSName()
+	mc.kernelVersion = getKernelVersion()
+	mc.ramTotal, _ = getRAMInfo()
+	mc.cpuTempPaths = mc.getTempPaths(cfg.CPUTempPath)
+
+	log("INFO", "System: OS=%s, Kernel=%s, RAM=%dMB", mc.osName, mc.kernelVersion, mc.ramTotal)
+
+	go mc.monitorCPU()
+	return mc, nil
+}
+
+func (mc *MetricsCollector) Close() {
+	mc.cancel()
+}
+
+func (mc *MetricsCollector) monitorCPU() {
+	ticker := time.NewTicker(2 * time.Second)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-mc.ctx.Done():
+			return
+		case <-ticker.C:
+			if percent, err := cpu.Percent(0, false); err == nil && len(percent) > 0 {
+				mc.cpuUsage.Store(int32(percent[0]))
+			}
+		}
+	}
+}
+
+func getOSName() string {
+	if runtime.GOOS == "windows" {
+		return "Windows"
+	}
+
+	file, err := os.Open("/etc/os-release")
+	if err != nil {
+		return runtime.GOOS
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "NAME=") {
+			return strings.Trim(line[5:], `"`)
+		}
+	}
+	return "Unknown"
+}
+
+func getKernelVersion() string {
+	info, err := host.Info()
+	if err != nil {
+		return "Unknown"
+	}
+
+	version := info.KernelVersion
+	if idx := strings.Index(version, "-"); idx > 0 {
+		version = version[:idx]
+	}
+	if len(version) > 10 {
+		version = version[:10]
+	}
+	return version
+}
+
+func getUptime() string {
+	uptime, err := host.Uptime()
+	if err != nil {
+		return "00:00"
+	}
+	h, m := uptime/3600, (uptime%3600)/60
+	return fmt.Sprintf("%02d:%02d", h, m)
+}
+
+func getRAMInfo() (int, int) {
+	vm, err := mem.VirtualMemory()
+	if err != nil {
+		return 0, 0
+	}
+	return int(vm.Total >> 20), int(vm.Available >> 20)
+}
+
+func (mc *MetricsCollector) getTempPaths(customPath string) []string {
+	if customPath != "" {
+		return []string{customPath}
+	}
+	return []string{
+		"/sys/class/thermal/thermal_zone0/temp",
+		"/sys/class/hwmon/hwmon0/temp1_input",
+		"/sys/devices/platform/coretemp.0/hwmon/hwmon0/temp1_input",
+		"/sys/devices/pci0000:00/0000:00:18.3/hwmon/hwmon0/temp1_input",
+	}
+}
+
+func (mc *MetricsCollector) getCPUTemp() int {
+	if runtime.GOOS == "windows" {
+		return 0
+	}
+
+	now := time.Now().UnixMilli()
+	if now-mc.lastTempCheck.Load() < 2000 {
+		return int(mc.cpuTempCache.Load())
+	}
+
+	for _, path := range mc.cpuTempPaths {
+		data, err := os.ReadFile(path)
+		if err != nil {
+			continue
+		}
+
+		val, err := strconv.Atoi(strings.TrimSpace(string(data)))
+		if err != nil {
+			continue
+		}
+
+		temp := val / 1000
+		if temp > 0 && temp < 120 {
+			mc.cpuTempCache.Store(int32(temp))
+			mc.lastTempCheck.Store(now)
+			return temp
+		}
+	}
+
+	return 0
+}
+
+func (mc *MetricsCollector) Collect() *SystemMetrics {
+	_, ramAvail := getRAMInfo()
+	return &SystemMetrics{
+		CPUTemp:       mc.getCPUTemp(),
+		CPUUsage:      int(mc.cpuUsage.Load()),
+		RAMTotal:      mc.ramTotal,
+		RAMAvailable:  ramAvail,
+		OSName:        mc.osName,
+		KernelVersion: mc.kernelVersion,
+		Uptime:        getUptime(),
+		Time:          time.Now().Format("15:04:05"),
+	}
+}
+
+func NewSerialManager(cfg *Config, collector *MetricsCollector) *SerialManager {
+	return &SerialManager{cfg: cfg, collector: collector}
+}
+
+func (sm *SerialManager) connect() (serial.Port, error) {
+	return serial.Open(sm.cfg.SerialPort, &serial.Mode{BaudRate: sm.cfg.BaudRate})
+}
+
+func (sm *SerialManager) Run(ctx context.Context) error {
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		default:
+		}
+
+		port, err := sm.connect()
+		if err != nil {
+			log("ERROR", "Failed to open serial port: %v", err)
+			time.Sleep(sm.cfg.ReconnectDelay)
+			continue
+		}
+
+		log("INFO", "Connected to %s", sm.cfg.SerialPort)
+		time.Sleep(sm.cfg.ConnectionWait)
+
+		err = sm.sendData(ctx, port)
+		port.Close()
+
+		if err == context.Canceled {
+			return err
+		}
+
+		if err != nil {
+			log("ERROR", "Send error: %v", err)
+		}
+
+		log("INFO", "Reconnecting...")
+		time.Sleep(sm.cfg.ReconnectDelay)
+	}
+}
+
+func (sm *SerialManager) sendData(ctx context.Context, port serial.Port) error {
+	ticker := time.NewTicker(sm.cfg.SendInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-ticker.C:
+			metrics := sm.collector.Collect()
+			data := metrics.Format()
+
+			if _, err := port.Write([]byte(data)); err != nil {
+				return err
+			}
+
+			log("DEBUG", "Sent: %s", strings.TrimSpace(data))
+		}
+	}
+}
+
+func main() {
+	log("INFO", "Starting system monitor on %s", runtime.GOOS)
+
+	cfg := loadConfig()
+	debugEnabled = cfg.Debug
+
+	collector, err := NewMetricsCollector(cfg)
+	if err != nil {
+		log("ERROR", "Failed to start: %v", err)
+		os.Exit(1)
+	}
+	defer collector.Close()
+
+	manager := NewSerialManager(cfg, collector)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		<-sigChan
+		log("INFO", "Shutting down...")
+		cancel()
+	}()
+
+	if err := manager.Run(ctx); err != nil && err != context.Canceled {
+		log("ERROR", "Fatal: %v", err)
+		os.Exit(1)
+	}
+
+	log("INFO", "Stopped")
+}