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