diff --git a/Hardware/bh1750/bh1750.c b/Hardware/bh1750/bh1750.c
new file mode 100644
index 0000000..0e5ecaf
--- /dev/null
+++ b/Hardware/bh1750/bh1750.c
@@ -0,0 +1,85 @@
+/**
+ * @file    bh1750.c
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.14
+ * @brief   BH1750 驱动
+ */
+
+#include "systick.h"
+
+#include "softi2c.h"
+
+#include "bh1750.h"
+
+#define SLAVE_ADDR_WR 0x46
+#define SLAVE_ADDR_RD 0x47
+
+#define I2C_Start SoftI2C_Start(&bh1750_i2c)
+#define I2C_Stop SoftI2C_Stop(&bh1750_i2c)
+#define I2C_WriteByte(__byte__) SoftI2C_WriteByte(&bh1750_i2c, __byte__)
+#define I2C_ReadByte SoftI2C_ReadByte(&bh1750_i2c)
+#define I2C_Ack SoftI2C_Ack(&bh1750_i2c)
+#define I2C_NAck SoftI2C_NAck(&bh1750_i2c)
+#define I2C_WaitAck SoftI2C_WaitAck(&bh1750_i2c)
+
+SoftI2C_TypeDef bh1750_i2c;
+
+/**
+  * @brief  初始化 BH1750
+  */
+void BH1750_Init(void)
+{
+    bh1750_i2c.SDA_GPIO = BH1750_GPIO;
+    bh1750_i2c.SDA_Pin = BH1750_SDA_PIN;
+
+    bh1750_i2c.SCL_GPIO = BH1750_GPIO;
+    bh1750_i2c.SCL_Pin = BH1750_SCL_PIN;
+
+    bh1750_i2c.Delay_Time = 5;
+
+    SoftI2C_Init(&bh1750_i2c);
+
+    Delay_ms(80);
+
+    I2C_Start;
+    I2C_WriteByte(SLAVE_ADDR_WR);
+    I2C_WaitAck;
+    I2C_WriteByte(0x01);
+    I2C_WaitAck;
+    I2C_Stop;
+}
+
+/**
+  * @brief  读取 BH1750 数据
+  * @retval 读数
+  */
+float BH1750_Read(void)
+{
+    uint8_t i;
+    uint8_t byte1;
+    uint8_t byte2;
+
+    I2C_Start;
+    I2C_WriteByte(SLAVE_ADDR_WR);
+    I2C_WaitAck;
+    I2C_WriteByte(0x10);
+    I2C_WaitAck;
+    I2C_Stop;
+
+    Delay_ms(180);
+
+    I2C_Start;
+    I2C_WriteByte(SLAVE_ADDR_RD);
+    I2C_WaitAck;
+
+    byte1 = I2C_ReadByte;
+    I2C_Ack;
+
+    byte2 = I2C_ReadByte;
+    I2C_NAck;
+
+    I2C_Stop;
+
+    return (float)((byte1 << 8) + byte2) / 1.2;
+}
diff --git a/Hardware/bh1750/bh1750.h b/Hardware/bh1750/bh1750.h
new file mode 100644
index 0000000..aad5dd5
--- /dev/null
+++ b/Hardware/bh1750/bh1750.h
@@ -0,0 +1,22 @@
+/**
+ * @file    bh1750.h
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.14
+ * @brief   BH1750 驱动
+ */
+
+#ifndef __BH1750_H
+#define __BH1750_H
+
+#include "sys.h"
+
+//BH1750 引脚设置
+#define BH1750_GPIO GPIOB
+#define BH1750_SDA_PIN GPIO_PIN_10
+#define BH1750_SCL_PIN GPIO_PIN_11
+
+void BH1750_Init(void);
+float BH1750_Read(void);
+
+#endif
diff --git a/Project/SlaveNode.uvprojx b/Project/SlaveNode.uvprojx
index 90dc4f3..45f0db2 100644
--- a/Project/SlaveNode.uvprojx
+++ b/Project/SlaveNode.uvprojx
@@ -339,7 +339,7 @@
               <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER, STM32F103x6</Define>
               <Undefine></Undefine>
-              <IncludePath>..\Core;..\Libraries\HAL_Lib\Inc;..\Libraries\SoftSPI_HAL_Lib;..\Libraries\SoftI2C_HAL_Lib;..\User\Main;..\System\sys;..\System\systick;..\System\uart;..\Hardware\led;..\Hardware\aht20</IncludePath>
+              <IncludePath>..\Core;..\Libraries\HAL_Lib\Inc;..\Libraries\SoftSPI_HAL_Lib;..\Libraries\SoftI2C_HAL_Lib;..\User\Main;..\System\sys;..\System\systick;..\System\uart;..\Hardware\led;..\Hardware\aht20;..\Hardware\bh1750</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
@@ -698,6 +698,11 @@
               <FileType>1</FileType>
               <FilePath>..\Hardware\aht20\aht20.c</FilePath>
             </File>
+            <File>
+              <FileName>bh1750.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\Hardware\bh1750\bh1750.c</FilePath>
+            </File>
           </Files>
         </Group>
       </Groups>
diff --git a/User/Main/main.c b/User/Main/main.c
index 2e6dced..d1f7afe 100644
--- a/User/Main/main.c
+++ b/User/Main/main.c
@@ -1,14 +1,15 @@
 /**
  * @file    main.c
  * @author  Myth
- * @version 0.3
- * @date    2021.10.12
+ * @version 0.5
+ * @date    2021.10.14
  * @brief   工程主函数文件
  * @details 初始化及主循环
  * @note    此版本实现功能：
  *          串口回显，回显时 PC13 上的 LED 闪烁
  *          软件 I2C
  *          AHT20 温度湿度读取
+ *          BH1750 光照度读取
  *          JTAG 已禁用，请使用 SWD 调试
  */
 
@@ -20,6 +21,7 @@
 
 #include "led.h"
 #include "aht20.h"
+#include "bh1750.h"
 
 void Echo(uint8_t byte);
 
@@ -41,6 +43,8 @@ int main(void)
     AHT20_Init(); //初始化 AHT20
     float humi, temp;
 
+    BH1750_Init(); //初始化 BH1750
+
     while (1)
     {
         //程序主循环
@@ -49,6 +53,8 @@ int main(void)
         else
             printf("fail to read AHT20.\n");
 
+        printf("light: %f\n", BH1750_Read()); //读取 BH1750
+
         Delay_ms(500);
     }