From b48265faedc40e3ac94a5d2f0563c8fe4ed14e58 Mon Sep 17 00:00:00 2001
From: Todd Treece <toddtreece@gmail.com>
Date: Mon, 5 Oct 2015 14:54:37 -0400
Subject: [PATCH] support anon auth & generated client id in constructor

---
 Adafruit_MQTT.cpp | 18 +++++++++++++-----
 Adafruit_MQTT.h   | 14 ++++++++++----
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/Adafruit_MQTT.cpp b/Adafruit_MQTT.cpp
index 79a1ffe..8c461dd 100644
--- a/Adafruit_MQTT.cpp
+++ b/Adafruit_MQTT.cpp
@@ -70,30 +70,39 @@ static uint8_t *stringprint_P(uint8_t *p, const char *s, uint16_t maxlen=0) {
 
 // Adafruit_MQTT Definition ////////////////////////////////////////////////////
 
-Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
-                             const char *user, const char *pass) {
+Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port,
+                             const char *user, const char *pass,
+                             const char *cid) {
   servername = server;
   portnum = port;
   clientid = cid;
   username = user;
   password = pass;
 
+  // reset subscriptions
   for (uint8_t i=0; i<MAXSUBSCRIPTIONS; i++) {
     subscriptions[i] = 0;
   }
+
 }
 
-Adafruit_MQTT::Adafruit_MQTT(const __FlashStringHelper *server, uint16_t port, const __FlashStringHelper *cid,
-                             const __FlashStringHelper *user, const __FlashStringHelper *pass) {
+Adafruit_MQTT::Adafruit_MQTT(const __FlashStringHelper *server,
+                             uint16_t port,
+                             const __FlashStringHelper *user,
+                             const __FlashStringHelper *pass,
+                             const __FlashStringHelper *cid) {
+
   servername = (const char *)server;
   portnum = port;
   clientid = (const char *)cid;
   username = (const char *)user;
   password = (const char *)pass;
 
+  // reset subscriptions
   for (uint8_t i=0; i<MAXSUBSCRIPTIONS; i++) {
     subscriptions[i] = 0;
   }
+
 }
 
 int8_t Adafruit_MQTT::connect() {
@@ -519,7 +528,6 @@ uint8_t Adafruit_MQTT::disconnectPacket(uint8_t *packet) {
   return 2;
 }
 
-
 // Adafruit_MQTT_Publish Definition ////////////////////////////////////////////
 
 Adafruit_MQTT_Publish::Adafruit_MQTT_Publish(Adafruit_MQTT *mqttserver, 
diff --git a/Adafruit_MQTT.h b/Adafruit_MQTT.h
index de05d50..fc65b0a 100644
--- a/Adafruit_MQTT.h
+++ b/Adafruit_MQTT.h
@@ -99,10 +99,16 @@ class Adafruit_MQTT_Subscribe;  // forward decl
 
 class Adafruit_MQTT {
  public:
-  Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
-                const char *user, const char *pass);
-  Adafruit_MQTT(const __FlashStringHelper *server, uint16_t port, const __FlashStringHelper *cid,
-                const __FlashStringHelper *user, const __FlashStringHelper *pass);
+  Adafruit_MQTT(const char *server = "io.adafruit.com",
+                uint16_t port = 1883, 
+                const char *user = "",
+                const char *pass = "",
+                const char *cid = "");
+  Adafruit_MQTT(const __FlashStringHelper *server = 0,
+                uint16_t port = 1883,
+                const __FlashStringHelper *user = 0,
+                const __FlashStringHelper *pass = 0,
+                const __FlashStringHelper *cid = 0);
   virtual ~Adafruit_MQTT() {}
 
   // Connect to the MQTT server.  Returns 0 on success, otherwise an error code