From 3049d48d560dfe1a676de3fe8e4aeec5f8ebf059 Mon Sep 17 00:00:00 2001
From: Jon Watte <jwatte@gmail.com>
Date: Sun, 10 May 2015 14:00:50 -0700
Subject: [PATCH] Fix UDP send to not temporarily use connect()

---
 libraries/ESP8266WiFi/src/WiFiUdp.cpp          | 12 ++++++------
 libraries/ESP8266WiFi/src/WiFiUdp.h            |  2 ++
 libraries/ESP8266WiFi/src/include/UdpContext.h |  2 +-
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/libraries/ESP8266WiFi/src/WiFiUdp.cpp b/libraries/ESP8266WiFi/src/WiFiUdp.cpp
index f2328aa6b..df736742d 100644
--- a/libraries/ESP8266WiFi/src/WiFiUdp.cpp
+++ b/libraries/ESP8266WiFi/src/WiFiUdp.cpp
@@ -132,14 +132,13 @@ int WiFiUDP::beginPacket(const char *host, uint16_t port)
 
 int WiFiUDP::beginPacket(IPAddress ip, uint16_t port)
 {
-    ip_addr_t addr;
-    addr.addr = ip;
-
     if (!_ctx) {
         _ctx = new UdpContext;
         _ctx->ref();
     }
-    return (_ctx->connect(addr, port)) ? 1 : 0;
+    begunIp_ = ip;
+    begunPort_= port;
+    return 1;
 }
 
 int WiFiUDP::beginPacketMulticast(IPAddress multicastAddress, uint16_t port, 
@@ -167,8 +166,9 @@ int WiFiUDP::endPacket()
     if (!_ctx)
         return 0;
 
-    _ctx->send();
-    _ctx->disconnect();
+    ip_addr_t addr;
+    addr.addr = begunIp_;
+    _ctx->send(&addr, begunPort_);
     return 1;
 }
 
diff --git a/libraries/ESP8266WiFi/src/WiFiUdp.h b/libraries/ESP8266WiFi/src/WiFiUdp.h
index a6bdc00da..880984745 100644
--- a/libraries/ESP8266WiFi/src/WiFiUdp.h
+++ b/libraries/ESP8266WiFi/src/WiFiUdp.h
@@ -31,6 +31,8 @@ class UdpContext;
 class WiFiUDP : public UDP {
 private:
   UdpContext* _ctx;
+  IPAddress begunIp_;
+  uint16_t begunPort_;
 
 public:
   WiFiUDP();  // Constructor
diff --git a/libraries/ESP8266WiFi/src/include/UdpContext.h b/libraries/ESP8266WiFi/src/include/UdpContext.h
index e244486e1..bd818e8e4 100644
--- a/libraries/ESP8266WiFi/src/include/UdpContext.h
+++ b/libraries/ESP8266WiFi/src/include/UdpContext.h
@@ -281,7 +281,7 @@ private:
 
     void _reserve(size_t size)
     {
-        const size_t pbuf_unit_size = 1024;
+        const size_t pbuf_unit_size = 512;
         if (!_tx_buf_head)
         {
             _tx_buf_head = pbuf_alloc(PBUF_TRANSPORT, pbuf_unit_size, PBUF_RAM);