From 2d679decfe9bf3956e910a56e8d40fe09321eedb Mon Sep 17 00:00:00 2001
From: Karai Csaba <cskarai@freemail.hu>
Date: Fri, 20 May 2016 07:43:59 +0200
Subject: [PATCH] Reconnect periodically

---
 examples/arduino/EspLinkSample/WebServer.cpp | 9 ++++++++-
 examples/arduino/EspLinkSample/WebServer.h   | 2 ++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/examples/arduino/EspLinkSample/WebServer.cpp b/examples/arduino/EspLinkSample/WebServer.cpp
index 5b0e775..6faa822 100644
--- a/examples/arduino/EspLinkSample/WebServer.cpp
+++ b/examples/arduino/EspLinkSample/WebServer.cpp
@@ -1,4 +1,7 @@
 #include "WebServer.h"
+#include "Arduino.h"
+
+#define RESUBSCRIBE_LIMIT 1000
 
 WebServer * WebServer::instance = NULL;
 
@@ -19,7 +22,10 @@ void WebServer::init()
 
 void WebServer::loop()
 {
-  // TODO: resubscribe periodically
+  // resubscribe periodically
+  uint32_t elapsed = millis() - last_connect_ts;
+  if( elapsed > RESUBSCRIBE_LIMIT )
+    registerCallback();
   espLink.readLoop();
 }
 
@@ -28,6 +34,7 @@ void WebServer::registerCallback()
   espLink.sendPacketStart(CMD_CB_ADD, 100, 1);
   espLink.sendPacketArg(5, (uint8_t *)"webCb");
   espLink.sendPacketEnd();
+  last_connect_ts = millis();
 }
 
 void WebServer::invokeMethod(RequestReason reason, WebMethod * method, CmdRequest *req)
diff --git a/examples/arduino/EspLinkSample/WebServer.h b/examples/arduino/EspLinkSample/WebServer.h
index 3b9a444..0a3606d 100644
--- a/examples/arduino/EspLinkSample/WebServer.h
+++ b/examples/arduino/EspLinkSample/WebServer.h
@@ -55,6 +55,8 @@ class WebServer
     int16_t                   args_to_send;
 
     char *                    value_ptr;
+
+    uint32_t                  last_connect_ts;
     
   protected:
     EspLink espLink;