QT-CART

QT-Server/read_weight.py

@@ -0,0 +1,33 @@
+from hx711 import HX711
+import json, time, threading
+
+# --- 보정값 로드 ---
+with open("hx711_calib.json", "r") as f:
+    calib = json.load(f)
+
+OFFSET = calib["offset"]
+SCALE  = calib["scale"]
+
+hx = HX711(5, 6)
+
+hx_lock = threading.Lock()
+
+def read_cart_weight():
+    """현재 카트 무게(g)를 반환"""
+    with hx_lock:
+        # 여러 번 평균 내서 노이즈 줄이기
+        samples = 10
+        total = 0
+
+        for _ in range(samples):
+            total += hx.read_raw()
+            time.sleep(0.02)
+
+        raw = total / samples
+        weight = (raw - OFFSET) / SCALE
+
+        # 음수/미세값 보호
+        if weight < 0:
+            weight = 0
+
+        return round(weight, 2)