diff --git a/handler/tool.go b/handler/tool.go
index f9ec7d0..7d83470 100644
--- a/handler/tool.go
+++ b/handler/tool.go
@@ -231,13 +231,10 @@ func ScanDeviceStatus() {
 	devices := worker.GetRedisSetMembers("627gyf3488h")
 	offline := ""
 	for _, v := range devices {
-		res := worker.GetRedis(v)
-		if res == "" {
-			c := worker.IsContainKey("monitor_" + v)
-			if c == false {
-				worker.SetRedisWithExpire("monitor_"+v, "1", time.Hour*12)
-				offline += v + ","
-			}
+		c := worker.IsContainKey("monitor_" + v)
+		if c == false {
+			worker.SetRedisWithExpire("monitor_"+v, "1", time.Hour*24)
+			offline += v + ","
 		}
 	}