diff --git a/components/drivers/sensors/sensor.c b/components/drivers/sensors/sensor.c
index 98a0e8aa74..0c21f04b6f 100644
--- a/components/drivers/sensors/sensor.c
+++ b/components/drivers/sensors/sensor.c
@@ -179,7 +179,7 @@ static rt_err_t rt_sensor_open(rt_device_t dev, rt_uint16_t oflag)
             rt_sensor_irq_init(sensor);
         }
     }
-    else if (oflag & RT_SENSOR_FLAG_FIFO && dev->flag & RT_SENSOR_FLAG_FIFO)
+    else if (oflag & RT_DEVICE_FLAG_FIFO_RX && dev->flag & RT_DEVICE_FLAG_FIFO_RX)
     {
         /* If fifo mode is supported, configure it to fifo mode */
         if (sensor->ops->control(sensor, RT_SENSOR_CTRL_SET_MODE, (void *)RT_SENSOR_MODE_FIFO) == RT_EOK)
diff --git a/components/drivers/sensors/sensor.h b/components/drivers/sensors/sensor.h
index f6afdb6dbb..fd437e4e09 100644
--- a/components/drivers/sensors/sensor.h
+++ b/components/drivers/sensors/sensor.h
@@ -25,7 +25,7 @@ extern "C" {
 #endif
 
 #define  RT_PIN_NONE                   0xFFFF    /* RT PIN NONE */
-#define  RT_SENSOR_FLAG_FIFO           0x200     /* Flag to use when the sensor is open by fifo mode */
+#define  RT_DEVICE_FLAG_FIFO_RX        0x200     /* Flag to use when the sensor is open by fifo mode */
 
 #define  RT_SENSOR_MODULE_MAX          (3)       /* The maximum number of members of a sensor module */
 
@@ -67,6 +67,7 @@ extern "C" {
 #define  RT_SENSOR_UNIT_DCELSIUS       (8)  /* Temperature             unit: dCelsius   */
 #define  RT_SENSOR_UNIT_HZ             (9)  /* Frequency               unit: HZ         */
 #define  RT_SENSOR_UNIT_ONE            (10) /* Dimensionless quantity  unit: 1          */
+#define  RT_SENSOR_UNIT_BPM            (11) /* Heart rate              unit: bpm        */
 
 /* Sensor communication interface types */
 
@@ -176,7 +177,7 @@ struct rt_sensor_data
         rt_int32_t           baro;          /* Pressure.            unit: pascal (Pa) */
         rt_int32_t           light;         /* Light.               unit: lux         */
         rt_int32_t           proximity;     /* Distance.            unit: centimeters */
-        rt_int32_t           hr;            /* Heat rate.           unit: HZ          */
+        rt_int32_t           hr;            /* Heart rate.          unit: bpm         */
         rt_int32_t           tvoc;          /* TVOC.                unit: permillage  */
         rt_int32_t           noise;         /* Noise Loudness.      unit: HZ          */
         rt_uint32_t          step;          /* Step sensor.         unit: 1           */
diff --git a/components/drivers/sensors/sensor_cmd.c b/components/drivers/sensors/sensor_cmd.c
index d1c7057c2f..b6dd471988 100644
--- a/components/drivers/sensors/sensor_cmd.c
+++ b/components/drivers/sensors/sensor_cmd.c
@@ -119,7 +119,7 @@ static void sensor_fifo(int argc, char **argv)
 
     rt_device_set_rx_indicate(dev, rx_callback);
 
-    if (rt_device_open(dev, RT_SENSOR_FLAG_FIFO) != RT_EOK)
+    if (rt_device_open(dev, RT_DEVICE_FLAG_FIFO_RX) != RT_EOK)
     {
         LOG_E("open device failed!");
         return;