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+# HX711 称重模块
+
+## 实物图
+
+
+
+## 概述
+
+HX711 是一款专为高精度电子秤设计的 24 位 A/D 转换芯片。该芯片内部集成了稳压电源、片内时钟振荡器等,具有集成度高、响应速度快、抗干扰性强等优点。模块采用 HX711 芯片配合压力传感器(电阻应变片),可精确测量重量,广泛应用于电子秤、工业控制、智能家具等场景。
+
+### 称重传感器(Load Cell)
+
+
+
+模块配套的**悬臂式称重传感器**,内部采用惠斯通电桥结构的应变片。当受力时,应变片发生微小形变,输出 mV 级差分电压信号,经 HX711 放大并转换为数字量。
+
+| 接线端子 | 颜色 | 功能 |
+| :------: | :--: | :----- |
+| E+ | 红 | 激励正 |
+| E- | 黑 | 激励负 |
+| A+ | 白 | 信号正 |
+| A- | 绿 | 信号负 |
+
+## 原理图
+
+查看原理图
+
+
+
+## 模块参数
+
+| 引脚名称 | 描述 |
+| :------: | :----------: |
+| VCC | 电源正 |
+| GND | 电源地 |
+| DT | 数据输出引脚 |
+| SCK | 时钟输入引脚 |
+
+- 供电电压: 5V
+- 分辨率: 24 位
+- 采样速率: 10/80 Hz
+- 工作电压: 2.6~5.5V
+- 连接方式: 4PIN 防反接杜邦线
+
+## 机械尺寸图
+
+
+
+## Arduino 示例程序
+
+### 简单读取示例
+
+点击下载示例
+
+```c
+/**
+ * @file hx711_simple.ino
+ * @brief HX711称重模块
+ *
+ * 硬件连接:
+ * HX711 DAT(数据) → Arduino D5
+ * HX711 CLK(时钟) → Arduino D6
+ * VCC → 5V, GND → GND
+ */
+
+#include "HX711.h"
+
+#define DATA_PIN 5
+#define CLOCK_PIN 6
+#define SCALE_VALUE 1092.673828 // 校准值
+
+HX711 scale;
+
+void setup() {
+ Serial.begin(115200);
+ scale.begin(DATA_PIN, CLOCK_PIN);
+
+ // 等待传感器就绪
+ scale.wait_ready();
+
+ // 设置中值滤波
+ scale.set_median_mode();
+
+ // 设置校准值
+ scale.set_scale(SCALE_VALUE);
+
+ // 自动去皮
+ Serial.println("[系统] 初始化HX711...");
+ Serial.print("[系统] Scale=");
+ Serial.println(SCALE_VALUE, 6);
+
+ scale.tare(20);
+ Serial.println("[系统] 去皮完成");
+
+ // 显示offset信息
+ Serial.print("[调试] Offset=");
+ Serial.println(scale.get_offset());
+ Serial.println("[系统] 开始测量\n");
+}
+
+void loop() {
+ // 获取重量(5次采样)
+ float weight = scale.get_units(5);
+
+ // 调试信息
+ Serial.print("[测量] 原始值=");
+ Serial.print(scale.get_value(5), 2);
+ Serial.print(" | 重量=");
+ Serial.print(weight, 2);
+ Serial.println(" g");
+
+ delay(300);
+}
+```
+
+### 校准 + 测量示例
+
+点击下载示例
+
+```c
+/**
+ * @file hx711_calibration.ino
+ * @brief HX711校准+测量一体程序
+ *
+ * 硬件连接:DAT→D5, CLK→D6, VCC→5V, GND→GND
+ * 流程:上电 → 去皮 → 输入已知重量校准 → 自动开始测量
+ */
+
+#include "HX711.h"
+
+#define DATA_PIN 5
+#define CLOCK_PIN 6
+
+HX711 scale;
+
+void setup() {
+ Serial.begin(115200);
+ scale.begin(DATA_PIN, CLOCK_PIN);
+ scale.wait_ready();
+ scale.set_median_mode();
+
+ Serial.println("=== HX711校准 ===\n");
+
+ // 步骤1: 去皮
+ Serial.println("1. 移除所有物品,按回车去皮...");
+ wait_enter();
+ scale.tare(20);
+ Serial.println(" 去皮完成!\n");
+
+ // 步骤2: 输入已知重量
+ Serial.println("2. 放置已知重量(克),输入数值后按回车:");
+ float weight = read_float();
+ Serial.print(" 已知重量: ");
+ Serial.print(weight);
+ Serial.println(" g\n");
+
+ // 步骤3: 校准
+ Serial.println("3. 正在校准...");
+ scale.calibrate_scale(weight, 30);
+
+ Serial.print("\n校准完成!scale=");
+ Serial.println(scale.get_scale(), 6);
+
+ // 步骤4: 重新去皮,准备测量
+ Serial.println("\n4. 请移除校准重量,按回车开始测量...");
+ wait_enter();
+ scale.tare(20);
+
+ Serial.println("\n=== 开始测量 ===\n");
+}
+
+void loop() {
+ float weight = scale.get_units(5);
+ Serial.print("重量: ");
+ Serial.print(weight, 2);
+ Serial.println(" g");
+ delay(300);
+}
+
+void wait_enter() {
+ while (!Serial.available());
+ Serial.readStringUntil('\n');
+}
+
+float read_float() {
+ while (!Serial.available());
+ float val = Serial.parseFloat();
+ Serial.readStringUntil('\n');
+ return val;
+}
+```
+
+## 使用说明
+
+### 首次校准
+
+1. 烧录 `hx711_calibration.ino`,打开串口监视器(波特率 **115200**)
+2. 按提示去皮 → 放上已知重量 → 输入重量值 → 获取 `scale` 校准值
+3. 将校准值填入 `hx711_simple.ino` 的 `SCALE_VALUE` 宏定义
+
+```
+校准完成!scale=1092.673828 ← 记录此值
+```
+
+```c
+#define SCALE_VALUE 1092.673828 // 替换为你的校准值
+```
+
+### 日常使用
+
+1. 上电后自动去皮后,再将测量物品放入,开始测量
+2. 测量时保持传感器稳定,避免震动
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