From ca82ccb9dbf2e800c118d7f327ecc5df5c688135 Mon Sep 17 00:00:00 2001
From: Grant Patterson <grant.patterson@gmail.com>
Date: Mon, 20 Nov 2017 18:09:15 -0800
Subject: [PATCH 1/3] Add ESP32 platform

Very similar to ESP8266.
---
 src/Platforms.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Platforms.h b/src/Platforms.h
index aa00894..f3a49b9 100644
--- a/src/Platforms.h
+++ b/src/Platforms.h
@@ -10,6 +10,15 @@
 #define SERVER_BEGIN_BOOL 0
 //------------------------------------------------------------------------------
 
+#elif defined(ESP32)
+//==============================================================================
+// ESP32
+//==============================================================================
+#include <WiFi.h>
+#define HAS_REMOTE_IP 1
+#define SERVER_BEGIN_BOOL 0
+//------------------------------------------------------------------------------
+
 #elif defined(PARTICLE)
 //==============================================================================
 // Particle

From 0d58aee574d344108e86dcdf68fbd536db5bf11f Mon Sep 17 00:00:00 2001
From: Grant Patterson <grant.patterson@gmail.com>
Date: Mon, 20 Nov 2017 18:12:02 -0800
Subject: [PATCH 2/3] Actually wait for header / data when needed

Things were behaving strangely and I was getting tons of DISCARDING DATA
messages; I think it's because opcRead() should return when it needs to
wait for stuff instead of calling the opcMsgReceivedCallback_
regardless.
---
 src/OpcServer.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/OpcServer.cpp b/src/OpcServer.cpp
index c9a1403..446988f 100644
--- a/src/OpcServer.cpp
+++ b/src/OpcServer.cpp
@@ -163,6 +163,7 @@ void OpcServer::opcRead(OpcClient& opcClient) {
     if (opcClient.bufferLength < OPC_HEADER_BYTES) {
       // Still waiting for a header
       debug_sprint(F("Waiting for Header\n"));
+      return;
     }
   }
 
@@ -182,6 +183,7 @@ void OpcServer::opcRead(OpcClient& opcClient) {
   if (opcClient.bufferLength < adjMsgLength) {
     // Waiting for more data
     debug_sprint("Waiting for more data\n");
+    return;
   }
 
   // Full OPC Message Read

From e987010a277fc6cd3eb9b8bc2c5ba35be09e6e76 Mon Sep 17 00:00:00 2001
From: Grant Patterson <grant.patterson@gmail.com>
Date: Wed, 27 Dec 2017 18:05:50 -0800
Subject: [PATCH 3/3] Add mDNSBegin() to broadcast OPC availability

Clients can call mDNSBegin() to start broadcasting the service
"_openpixelctrl", which has been approved by OPC creator Ping as a
suitable mDNS service name.
Only ESP32 support
---
 src/OpcServer.cpp | 12 ++++++++++++
 src/OpcServer.h   |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/src/OpcServer.cpp b/src/OpcServer.cpp
index 446988f..7889e53 100644
--- a/src/OpcServer.cpp
+++ b/src/OpcServer.cpp
@@ -1,6 +1,10 @@
 #include "OpcServer.h"
 #include "Definitions.h"
 
+#if defined(ESP32)
+#include "ESPmDNS.h"
+#endif
+
 OpcServer::OpcServer(WiFiServer& server,
                      uint8_t opcChannel,
                      OpcClient opcClients[],
@@ -195,3 +199,11 @@ void OpcServer::opcRead(OpcClient& opcClient) {
   // Set to discard remaining bytes on next call
   opcClient.bufferBytesToDiscard = msgLength - adjMsgLength;
 }
+
+#if defined(ESP32)
+void OpcServer::mDNSBegin(String hostname) {
+  // This may fail if MDNS.begin() has already been called
+  MDNS.begin(hostname.c_str());
+  MDNS.addService("_openpixelctrl", "_tcp", 7890);
+}
+#endif
diff --git a/src/OpcServer.h b/src/OpcServer.h
index 1052993..4e84a85 100644
--- a/src/OpcServer.h
+++ b/src/OpcServer.h
@@ -30,6 +30,10 @@ class OpcServer {
   void setClientDisconnectedCallback(OpcClientDisconnectedCallback opcClientDisconnectedCallback);
   void setMsgReceivedCallback(OpcMsgReceivedCallback opcMsgReceivedCallback);
 
+#if defined(ESP32)
+  void mDNSBegin(String hostname);
+#endif
+
  private:
   bool processClient(OpcClient& opcClient);
   void opcRead(OpcClient& opcClient);