feat: 新增获取最新数据的接口

internal/handler/sensor.go

@@ -2,6 +2,7 @@ package handler
 
 import (
 	"encoding/json"
+	"fmt"
 	"net/http"
 	"time"
 
@@ -183,3 +184,25 @@ func (h *SensorHandler) GetLatestSensorRawData(w http.ResponseWriter, r *http.Re
 		return
 	}
 }
+
+// TriggerManualQuery 手动触发向所有设备发送查询指令
+func (h *SensorHandler) TriggerManualQuery(w http.ResponseWriter, r *http.Request) {
+	count := tcp.TriggerManualQuery()
+
+	response := struct {
+		Success bool   `json:"success"`
+		Message string `json:"message"`
+		Count   int    `json:"count"`
+	}{
+		Success: count > 0,
+		Message: fmt.Sprintf("成功向%d个设备发送查询指令", count),
+		Count:   count,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	encoder := json.NewEncoder(w)
+	if err := encoder.Encode(response); err != nil {
+		logger.Logger.Printf("JSON编码失败: %v", err)
+		http.Error(w, "服务器内部错误", http.StatusInternalServerError)
+	}
+}

internal/tcp/sensor.go

@@ -349,3 +349,24 @@ func hexCharToByte(c byte) (byte, bool) {
 	}
 	return 0, false
 }
+
+// TriggerManualQuery 手动触发向所有设备发送查询
+func TriggerManualQuery() int {
+	activeConnections.mu.RLock()
+	defer activeConnections.mu.RUnlock()
+
+	count := 0
+	for addr, conn := range activeConnections.conns {
+		// 只有活跃的连接才发送查询
+		if time.Since(conn.lastActivity) < time.Minute*10 {
+			if err := conn.sendQuery(); err != nil {
+				logger.Logger.Printf("手动触发查询失败 [%s]: %v", addr, err)
+			} else {
+				logger.Logger.Printf("手动触发查询成功 [%s]", addr)
+				count++
+			}
+		}
+	}
+
+	return count
+}

main.go

@@ -55,6 +55,7 @@ func main() {
 	http.HandleFunc("/api/latest", sensorHandler.GetLatestData)
 	http.HandleFunc("/api/status", sensorHandler.GetConnectionStatus)
 	http.HandleFunc("/api/raw/latest", sensorHandler.GetLatestSensorRawData)
+	http.HandleFunc("/api/trigger-query", sensorHandler.TriggerManualQuery)
 	http.HandleFunc("/", sensorHandler.ServeStatic)
 
 	// 启动TCP服务器

static/index.html

@@ -361,6 +361,29 @@
                 });
         }
 
+        // 触发设备进行数据查询
+        function triggerDeviceQuery() {
+            return fetch('/api/trigger-query')
+                .then(response => response.json())
+                .then(data => {
+                    console.log('触发设备查询结果:', data);
+                    if (data.success) {
+                        // 如果成功触发查询，等待3秒后获取新数据
+                        return new Promise(resolve => {
+                            setTimeout(() => {
+                                console.log('等待3秒后获取新数据');
+                                resolve(data);
+                            }, 3000);
+                        });
+                    }
+                    return data;
+                })
+                .catch(error => {
+                    console.error('触发设备查询失败:', error);
+                    return { success: false, message: '触发设备查询失败' };
+                });
+        }
+
         // 查询最新数据
         function queryLatestData() {
             const interval = document.getElementById('interval').value;
@@ -388,11 +411,22 @@
 
             // 加载状态指示
             document.getElementById('mainChart').style.opacity = 0.5;
+            const latestDataElement = document.querySelector('.latest-data');
+            latestDataElement.style.opacity = 0.5;
             
-            // 同时获取最新的传感器原始数据
-            fetchLatestSensorData();
-            
-            fetch(`/api/latest?interval=${interval}&start=${startDateTime}&end=${endDateTime}`)
+            // 首先触发设备查询
+            triggerDeviceQuery()
+                .then(() => {
+                    // 获取最新传感器数据
+                    return fetchLatestSensorData();
+                })
+                .then(() => {
+                    // 恢复最新数据区域的不透明度
+                    latestDataElement.style.opacity = 1;
+                    
+                    // 获取聚合数据
+                    return fetch(`/api/latest?interval=${interval}&start=${startDateTime}&end=${endDateTime}`);
+                })
                 .then(response => response.json())
                 .then(data => {
                     updateChart(data);
@@ -410,6 +444,7 @@
                     alert('获取最新数据失败，请检查网络连接');
                     // 恢复正常显示
                     document.getElementById('mainChart').style.opacity = 1;
+                    latestDataElement.style.opacity = 1;
                 });
         }