commit

main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+	"math"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/karalabe/hid"
+)
+
+const (
+	vendorID     = 0x1446
+	productID    = 0x6A73
+	refreshRate  = 500 * time.Millisecond
+	calibration  = 0.952 // scale correction factor: 2.1 reported = 2.0 actual
+)
+
+func main() {
+	devices := hid.Enumerate(vendorID, productID)
+	if len(devices) == 0 {
+		fmt.Println("❌ Scale not found.")
+		os.Exit(1)
+	}
+
+	device, err := devices[0].Open()
+	if err != nil {
+		fmt.Println("❌ Failed to open scale:", err)
+		os.Exit(1)
+	}
+	defer device.Close()
+	fmt.Println("✅ Scale connected. Reading... (Ctrl+C to quit)")
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		<-c
+		fmt.Print("\n👋 Exiting.\n")
+		device.Close()
+		os.Exit(0)
+	}()
+
+	for {
+		buf := make([]byte, 8)
+		n, err := device.Read(buf)
+		if err != nil || n < 6 {
+			fmt.Print("\r⚠️  No data              ")
+			time.Sleep(refreshRate)
+			continue
+		}
+
+		raw := binary.LittleEndian.Uint16(buf[4:6])
+		oz := float64(raw) / 10.0 * calibration
+		rounded := math.Round(oz*10) / 10
+
+		fmt.Printf("\r📦 Weight: %.1f oz       ", rounded)
+		time.Sleep(refreshRate)
+	}
+}