diff --git a/drivers/sensor/sht3xd/sht3xd.c b/drivers/sensor/sht3xd/sht3xd.c
index c63f8dd8e97..14a07aab7b1 100644
--- a/drivers/sensor/sht3xd/sht3xd.c
+++ b/drivers/sensor/sht3xd/sht3xd.c
@@ -232,6 +232,7 @@ static const struct sht3xd_config sht3xd0_cfg = {
 	.base_address = DT_INST_0_SENSIRION_SHT3XD_BASE_ADDRESS,
 #ifdef CONFIG_SHT3XD_TRIGGER
 	.alert_pin = DT_INST_0_SENSIRION_SHT3XD_ALERT_GPIOS_PIN,
+	.alert_flags = DT_INST_0_SENSIRION_SHT3XD_ALERT_GPIOS_FLAGS,
 #endif
 };
 
diff --git a/drivers/sensor/sht3xd/sht3xd.h b/drivers/sensor/sht3xd/sht3xd.h
index 836f7150e45..eb2c6d1b1e3 100644
--- a/drivers/sensor/sht3xd/sht3xd.h
+++ b/drivers/sensor/sht3xd/sht3xd.h
@@ -51,7 +51,8 @@ struct sht3xd_config {
 
 	u8_t base_address;
 #ifdef CONFIG_SHT3XD_TRIGGER
-	s8_t alert_pin;
+	u8_t alert_pin;
+	u8_t alert_flags;
 #endif /* CONFIG_SHT3XD_TRIGGER */
 };
 
diff --git a/drivers/sensor/sht3xd/sht3xd_trigger.c b/drivers/sensor/sht3xd/sht3xd_trigger.c
index 9fe355930ec..eceaabb3ae9 100644
--- a/drivers/sensor/sht3xd/sht3xd_trigger.c
+++ b/drivers/sensor/sht3xd/sht3xd_trigger.c
@@ -81,35 +81,86 @@ int sht3xd_attr_set(struct device *dev,
 	return 0;
 }
 
+static inline void setup_alert(struct device *dev,
+			       bool enable)
+{
+	struct sht3xd_data *data = (struct sht3xd_data *)dev->driver_data;
+	const struct sht3xd_config *cfg =
+		(const struct sht3xd_config *)dev->config->config_info;
+	unsigned int flags = enable
+		? GPIO_INT_EDGE_TO_ACTIVE
+		: GPIO_INT_DISABLE;
+
+	gpio_pin_interrupt_configure(data->alert_gpio, cfg->alert_pin, flags);
+}
+
+static inline void handle_alert(struct device *dev)
+{
+	setup_alert(dev, false);
+
+#if defined(CONFIG_SHT3XD_TRIGGER_OWN_THREAD)
+	struct sht3xd_data *data = (struct sht3xd_data *)dev->driver_data;
+
+	k_sem_give(&data->gpio_sem);
+#elif defined(CONFIG_SHT3XD_TRIGGER_GLOBAL_THREAD)
+	struct sht3xd_data *data = (struct sht3xd_data *)dev->driver_data;
+
+	k_work_submit(&data->work);
+#endif
+}
+
+int sht3xd_trigger_set(struct device *dev,
+		       const struct sensor_trigger *trig,
+		       sensor_trigger_handler_t handler)
+{
+	struct sht3xd_data *data = (struct sht3xd_data *)dev->driver_data;
+	const struct sht3xd_config *cfg =
+		(const struct sht3xd_config *)dev->config->config_info;
+
+	setup_alert(dev, false);
+
+	if (trig->type != SENSOR_TRIG_THRESHOLD) {
+		return -ENOTSUP;
+	}
+
+	data->handler = handler;
+	if (handler == NULL) {
+		return 0;
+	}
+
+	data->trigger = *trig;
+
+	setup_alert(dev, true);
+
+	/* If ALERT is active we probably won't get the rising edge,
+	 * so invoke the callback manually.
+	 */
+	if (gpio_pin_get(data->alert_gpio, cfg->alert_pin)) {
+		handle_alert(dev);
+	}
+
+	return 0;
+}
+
 static void sht3xd_gpio_callback(struct device *dev,
 				 struct gpio_callback *cb, u32_t pins)
 {
 	struct sht3xd_data *data =
 		CONTAINER_OF(cb, struct sht3xd_data, alert_cb);
-	const struct sht3xd_config *cfg = data->dev->config->config_info;
 
-	ARG_UNUSED(pins);
-
-	gpio_pin_disable_callback(dev, cfg->alert_pin);
-
-#if defined(CONFIG_SHT3XD_TRIGGER_OWN_THREAD)
-	k_sem_give(&data->gpio_sem);
-#elif defined(CONFIG_SHT3XD_TRIGGER_GLOBAL_THREAD)
-	k_work_submit(&data->work);
-#endif
+	handle_alert(data->dev);
 }
 
 static void sht3xd_thread_cb(void *arg)
 {
-	struct device *dev = arg;
-	struct sht3xd_data *data = dev->driver_data;
-	const struct sht3xd_config *cfg = dev->config->config_info;
+	struct device *dev = (struct device *)arg;
+	struct sht3xd_data *data = (struct sht3xd_data *)dev->driver_data;
 
 	if (data->handler != NULL) {
 		data->handler(dev, &data->trigger);
 	}
 
-	gpio_pin_enable_callback(data->alert_gpio, cfg->alert_pin);
+	setup_alert(dev, true);
 }
 
 #ifdef CONFIG_SHT3XD_TRIGGER_OWN_THREAD
@@ -137,25 +188,6 @@ static void sht3xd_work_cb(struct k_work *work)
 }
 #endif
 
-int sht3xd_trigger_set(struct device *dev,
-		       const struct sensor_trigger *trig,
-		       sensor_trigger_handler_t handler)
-{
-	struct sht3xd_data *data = dev->driver_data;
-	const struct sht3xd_config *cfg = dev->config->config_info;
-
-	if (trig->type != SENSOR_TRIG_THRESHOLD) {
-		return -ENOTSUP;
-	}
-
-	gpio_pin_disable_callback(data->alert_gpio, cfg->alert_pin);
-	data->handler = handler;
-	data->trigger = *trig;
-	gpio_pin_enable_callback(data->alert_gpio, cfg->alert_pin);
-
-	return 0;
-}
-
 int sht3xd_init_interrupt(struct device *dev)
 {
 	struct sht3xd_data *data = dev->driver_data;
@@ -172,9 +204,7 @@ int sht3xd_init_interrupt(struct device *dev)
 	data->alert_gpio = gpio;
 
 	rc = gpio_pin_configure(gpio, cfg->alert_pin,
-				GPIO_DIR_IN | GPIO_INT |
-				GPIO_INT_EDGE | GPIO_INT_DOUBLE_EDGE |
-				GPIO_INT_ACTIVE_HIGH | GPIO_INT_DEBOUNCE);
+				GPIO_INPUT | cfg->alert_flags);
 	if (rc != 0) {
 		LOG_DBG("Failed to configure alert pin %u!", cfg->alert_pin);
 		return -EIO;
diff --git a/dts/bindings/sensor/sensirion,sht3xd.yaml b/dts/bindings/sensor/sensirion,sht3xd.yaml
index 3b670a8f2b2..ce6e5245889 100644
--- a/dts/bindings/sensor/sensirion,sht3xd.yaml
+++ b/dts/bindings/sensor/sensirion,sht3xd.yaml
@@ -11,4 +11,9 @@ properties:
     alert-gpios:
       type: phandle-array
       required: false
-      description: ALERT pin
+      description: >
+        ALERT pin.
+
+        This pin signals active high when produced by the sensor.  The
+        property value should ensure the flags properly describe the
+        signal that is presented to the driver.
diff --git a/samples/sensor/sht3xd/efr32mg_sltb004a.overlay b/samples/sensor/sht3xd/efr32mg_sltb004a.overlay
index 529c5673c28..312efb9e01c 100644
--- a/samples/sensor/sht3xd/efr32mg_sltb004a.overlay
+++ b/samples/sensor/sht3xd/efr32mg_sltb004a.overlay
@@ -9,6 +9,6 @@
 		compatible = "sensirion,sht3xd";
 		reg = <0x44>;
 		label = "SHT3XD";
-		alert-gpios = <&gpiof 6 GPIO_INT_ACTIVE_HIGH>;
+		alert-gpios = <&gpiof 6 GPIO_ACTIVE_HIGH>;
 	};
 };
diff --git a/samples/sensor/sht3xd/frdm_k64f.overlay b/samples/sensor/sht3xd/frdm_k64f.overlay
index ffd32e40318..e6718ca7114 100644
--- a/samples/sensor/sht3xd/frdm_k64f.overlay
+++ b/samples/sensor/sht3xd/frdm_k64f.overlay
@@ -9,6 +9,6 @@
 		compatible = "sensirion,sht3xd";
 		reg = <0x44>;
 		label = "SHT3XD";
-		alert-gpios = <&gpioe 26 GPIO_INT_ACTIVE_HIGH>;
+		alert-gpios = <&gpioe 26 GPIO_ACTIVE_HIGH>;
 	};
 };
diff --git a/samples/sensor/sht3xd/nrf51_ble400.overlay b/samples/sensor/sht3xd/nrf51_ble400.overlay
index 1b7aca973e1..2d67ec55e85 100644
--- a/samples/sensor/sht3xd/nrf51_ble400.overlay
+++ b/samples/sensor/sht3xd/nrf51_ble400.overlay
@@ -9,6 +9,6 @@
 		compatible = "sensirion,sht3xd";
 		reg = <0x44>;
 		label = "SHT3XD";
-		alert-gpios = <&gpio0 2 GPIO_INT_ACTIVE_HIGH>;
+		alert-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
 	};
 };
diff --git a/samples/sensor/sht3xd/nrf52840_pca10056.overlay b/samples/sensor/sht3xd/nrf52840_pca10056.overlay
index 736dba50543..3182f464d4f 100644
--- a/samples/sensor/sht3xd/nrf52840_pca10056.overlay
+++ b/samples/sensor/sht3xd/nrf52840_pca10056.overlay
@@ -9,6 +9,6 @@
 		compatible = "sensirion,sht3xd";
 		reg = <0x44>;
 		label = "SHT3XD";
-		alert-gpios = <&gpio1 10 GPIO_INT_ACTIVE_HIGH>;
+		alert-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
 	};
 };
diff --git a/samples/sensor/sht3xd/nucleo_l476rg.overlay b/samples/sensor/sht3xd/nucleo_l476rg.overlay
index 5e972fcc9ed..3a538c09447 100644
--- a/samples/sensor/sht3xd/nucleo_l476rg.overlay
+++ b/samples/sensor/sht3xd/nucleo_l476rg.overlay
@@ -10,6 +10,6 @@
 		compatible = "sensirion,sht3xd";
 		reg = <0x44>;
 		label = "SHT3XD";
-		alert-gpios = <&gpioa 9 GPIO_INT_ACTIVE_HIGH>;
+		alert-gpios = <&gpioa 9 GPIO_ACTIVE_HIGH>;
 	};
 };
diff --git a/samples/sensor/sht3xd/src/main.c b/samples/sensor/sht3xd/src/main.c
index f81a8d43069..c0a7ebcffb7 100644
--- a/samples/sensor/sht3xd/src/main.c
+++ b/samples/sensor/sht3xd/src/main.c
@@ -9,7 +9,8 @@
 #include <drivers/sensor.h>
 #include <stdio.h>
 
-#define ALERT_HUMIDITY 40
+#define ALERT_HUMIDITY_LO 50
+#define ALERT_HUMIDITY_HI 60
 
 #ifdef CONFIG_SHT3XD_TRIGGER
 static volatile bool alerted;
@@ -36,8 +37,8 @@ void main(void)
 		.type = SENSOR_TRIG_THRESHOLD,
 		.chan = SENSOR_CHAN_HUMIDITY,
 	};
-	struct sensor_value lo_thr = { 0 };
-	struct sensor_value hi_thr = { ALERT_HUMIDITY };
+	struct sensor_value lo_thr = { ALERT_HUMIDITY_LO };
+	struct sensor_value hi_thr = { ALERT_HUMIDITY_HI };
 	bool last_alerted = false;
 
 	rc = sensor_attr_set(dev, SENSOR_CHAN_HUMIDITY,
@@ -56,17 +57,6 @@ void main(void)
 	while (true) {
 		struct sensor_value temp, hum;
 
-#ifdef CONFIG_SHT3XD_TRIGGER
-		if (alerted != last_alerted) {
-			static const char *const alert_str[] = {
-				"below",
-				"above",
-			};
-			printf("Humidity %s %d!\n", alert_str[alerted],
-			       hi_thr.val1);
-			last_alerted = alerted;
-		}
-#endif
 		rc = sensor_sample_fetch(dev);
 		if (rc == 0) {
 			rc = sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP,
@@ -80,6 +70,23 @@ void main(void)
 			printf("SHT3XD: failed: %d\n", rc);
 			break;
 		}
+
+#ifdef CONFIG_SHT3XD_TRIGGER
+		if (alerted != last_alerted) {
+			if (lo_thr.val1 > hum.val1) {
+				printf("ALERT: humidity %d < %d\n",
+				       hum.val1, lo_thr.val1);
+			} else if (hi_thr.val1 < hum.val1) {
+				printf("ALERT: humidity %d > %d\n",
+				       hum.val1, hi_thr.val1);
+			} else {
+				printf("ALERT: humidity %d <= %d <= %d\n",
+				       lo_thr.val1, hum.val1, hi_thr.val1);
+			}
+			last_alerted = alerted;
+		}
+#endif
+
 		printf("SHT3XD: %.2f Cel ; %0.2f %%RH\n",
 		       sensor_value_to_double(&temp),
 		       sensor_value_to_double(&hum));
diff --git a/samples/sensor/sht3xd/trigger.conf b/samples/sensor/sht3xd/trigger.conf
index 9b01c05f4df..8c9a5248024 100644
--- a/samples/sensor/sht3xd/trigger.conf
+++ b/samples/sensor/sht3xd/trigger.conf
@@ -8,4 +8,6 @@ CONFIG_STDOUT_CONSOLE=y
 CONFIG_I2C=y
 CONFIG_SENSOR=y
 CONFIG_SHT3XD=y
+CONFIG_LOG=y
+CONFIG_SENSOR_LOG_LEVEL_DBG=y
 CONFIG_SHT3XD_TRIGGER_GLOBAL_THREAD=y