fix for #3380, socket.io timeout closure

Author: sdetweil

CHANGELOG.md

@@ -37,6 +37,7 @@ Thanks to: @dathbe.
 - [calendar] Fixed broken unittest that only broke on the 1st of July and 1st of january (#3830)
 - [clock] Fixed missing icons when no other modules with icons is loaded (#3834)
 - [weather] Fixed handling of empty values in weathergov providers handling of precipitationAmount (#3859)
+- [core] Fixed socket.io timeout when server is slow to send notification, notification lost at client (#3380)
 
 ## [2.32.0] - 2025-07-01
 

js/server.js

@@ -42,7 +42,9 @@ function Server (config) {
 					origin: /.*$/,
 					credentials: true
 				},
-				allowEIO3: true
+				allowEIO3: true,
+				pingInterval: 120000, // server → client ping every 2 mins   //add
+				pingTimeout: 120000 // wait up to 2 mins for client pong   //add
 			});
 
 			server.on("connection", (socket) => {

js/socketclient.js

@@ -13,7 +13,9 @@ const MMSocket = function (moduleName) {
 		base = config.basePath;
 	}
 	this.socket = io(`/${this.moduleName}`, {
-		path: `${base}socket.io`
+		path: `${base}socket.io`,
+		pingInterval: 120000, // send pings every 2 mins     // add
+		pingTimeout: 120000 // wait up to 2 mins for a pong  // add
 	});
 
 	let notificationCallback = function () {};