diff --git a/pages/fourmonitor/pest.vue b/pages/fourmonitor/pest.vue
index 4bfab25..c7f72e0 100644
--- a/pages/fourmonitor/pest.vue
+++ b/pages/fourmonitor/pest.vue
@@ -255,7 +255,7 @@
 					this.mqttSubscribes(this.topics);
 					getApp().addMsgEvent("mqtt", "mqtt_head", function(e) {
 						if (e.type == "state") {
-							that.mqttConnected = e.connected;
+							this.mqttConnected = e.connected;
 						} else if (e.type == "msg") {
 							this.itemProperty = e.data;
 						}
diff --git a/pages/fourmonitor/spore.vue b/pages/fourmonitor/spore.vue
index bfd73b6..3f1b318 100644
--- a/pages/fourmonitor/spore.vue
+++ b/pages/fourmonitor/spore.vue
@@ -226,7 +226,7 @@
 					this.mqttSubscribes(this.topics);
 					getApp().addMsgEvent("mqtt", "mqtt_head", function(e) {
 						if (e.type == "state") {
-							that.mqttConnected = e.connected;
+							this.mqttConnected = e.connected;
 						} else if (e.type == "msg") {
 							this.itemProperty = e.data;
 						}
diff --git a/pages/fourmonitor/weatherstation.vue b/pages/fourmonitor/weatherstation.vue
index 4acf1a2..6671240 100644
--- a/pages/fourmonitor/weatherstation.vue
+++ b/pages/fourmonitor/weatherstation.vue
@@ -215,7 +215,7 @@
 					this.mqttSubscribes(this.topics);
 					getApp().addMsgEvent("mqtt", "mqtt_head", function(e) {
 						if (e.type == "state") {
-							that.mqttConnected = e.connected;
+							this.mqttConnected = e.connected;
 						} else if (e.type == "msg") {
 							this.itemProperty = e.data;
 						}
diff --git a/pages/head/fertilizerapplicator/detail.vue b/pages/head/fertilizerapplicator/detail.vue
index 0047ff6..0cb7c02 100644
--- a/pages/head/fertilizerapplicator/detail.vue
+++ b/pages/head/fertilizerapplicator/detail.vue
@@ -463,7 +463,7 @@
 			this.mqttSubscribes(this.topics);
 			getApp().addMsgEvent("mqtt", "mqtt_fertilizer", function(e) {
 				if (e.type == "state") {
-					that.mqttConnected = e.connected;
+					this.mqttConnected = e.connected;
 				} else if (e.type == "msg") {
 					this.itemProperty = e.data;
 					this.devicePropertyStatus();
diff --git a/pages/head/fertilizerapplicator/detailkl.vue b/pages/head/fertilizerapplicator/detailkl.vue
index b3061ee..1e72f7c 100644
--- a/pages/head/fertilizerapplicator/detailkl.vue
+++ b/pages/head/fertilizerapplicator/detailkl.vue
@@ -407,7 +407,7 @@
 			this.mqttSubscribes(this.topics);
 			getApp().addMsgEvent("mqtt", "mqtt_fertilizerKL", function(e) {
 				if (e.type == "state") {
-					that.mqttConnected = e.connected;
+					this.mqttConnected = e.connected;
 				} else if (e.type == "msg") {
 					this.itemProperty = e.data;
 					this.devicePropertyStatus();
diff --git a/pages/head/headdevice/detail.vue b/pages/head/headdevice/detail.vue
index 7d5e1b1..6bbc5b4 100644
--- a/pages/head/headdevice/detail.vue
+++ b/pages/head/headdevice/detail.vue
@@ -353,7 +353,7 @@
 				this.mqttSubscribes(this.topics);
 				getApp().addMsgEvent("mqtt", "mqtt_head", function(e) {
 					if (e.type == "state") {
-						that.mqttConnected = e.connected;
+						this.mqttConnected = e.connected;
 					} else if (e.type == "msg") {
 						this.itemProperty = e.data;
 						this.devicePropertyStatus();