最新版本密胺计量代码

RS485.py

@@ -51,15 +51,15 @@ class RS485Reader:
             raise
 
     def read_weight(self):
-        cmd = bytes.fromhex('010300000002c40b')
+        cmd = bytes.fromhex('010300000002c40b')   # 从地址 01 的设备读取 2 个保持寄存器，从地址 0 开始
         try:
             self.ser.write(cmd)
-            response = self.ser.read(9)
+            response = self.ser.read(9)   # 然后读取设备返回的 9 字节响应
             if len(response) == 9 and response[:3] == bytes.fromhex("010304"):
                 weight = int.from_bytes(response[3:5], 'big')
                 with self.lock:
                     self.buffer.append(weight)
-                    self.current_weight = sum(self.buffer) // len(self.buffer)
+                    self.current_weight = sum(self.buffer) // len(self.buffer)   # 平滑滤波
                 return True
             return False
         except Exception as e:
@@ -68,7 +68,7 @@ class RS485Reader:
             return False
 
     def tare(self):    # 去皮方法
-        cmd = bytes.fromhex('01060064000109d5')  # 01 06 00 64 00 01 09 d5
+        cmd = bytes.fromhex('01060064000109d5')  # 01 06 00 64 00 01 09 d5  发送命令给设备地址 1，将寄存器地址 0x0064 设置为 0x0001，执行“去皮”指令。
         try:
             if self.read_weight():  # 确保有最新数据
                 self.ser.write(cmd)