From 362a561a35960ea8ae8a67f2ab2daa5af2f242df Mon Sep 17 00:00:00 2001
From: Chris Liebman <chris.l@taboola.com>
Date: Sun, 4 Jun 2017 06:41:27 -0700
Subject: [PATCH] use malloc/free for WiFiManagerParameter* array instead of
 hard coding. add alternate constructor to specifiy max parameter count
 origional default constructor uses old hard codded value

---
 README.md       |  5 +++++
 WiFiManager.cpp | 27 +++++++++++++++++++++++++--
 WiFiManager.h   |  6 +++++-
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index a329f2b..3e83d4b 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,11 @@ You should also take a look at adding custom HTML to your form.
 - Save and load custom parameters to file system in json form [AutoConnectWithFSParameters](https://github.com/tzapu/WiFiManager/tree/master/examples/AutoConnectWithFSParameters)
 - *Save and load custom parameters to EEPROM* (not done yet)
 
+NOTE: if your need more than 10 (the default) custom parameters you will need to use the alternate constructor:
+```cpp
+WiFiManager wifiManager(15); // pass the number of params you will be adding
+```
+
 #### Custom IP Configuration
 You can set a custom IP for both AP (access point, config mode) and STA (station mode, client mode, normal project state)
 
diff --git a/WiFiManager.cpp b/WiFiManager.cpp
index 4fba355..4be0105 100644
--- a/WiFiManager.cpp
+++ b/WiFiManager.cpp
@@ -60,14 +60,37 @@ const char* WiFiManagerParameter::getCustomHTML() {
   return _customHTML;
 }
 
+
 WiFiManager::WiFiManager() {
+    init(WIFI_MANAGER_MAX_PARAMS);
+}
+
+WiFiManager::WiFiManager(int max_params) {
+    init(max_params);
+}
+
+void WiFiManager::init(int max_params)
+{
+    DEBUG_WM(F("setting max_params to:"));
+    DEBUG_WM(max_params);
+    _max_params = max_params;
+    _params = (WiFiManagerParameter**)malloc(_max_params * sizeof(WiFiManagerParameter*));
+}
+
+WiFiManager::~WiFiManager()
+{
+    if (_params != NULL)
+    {
+        DEBUG_WM(F("freeing allocated params!"));
+        free(_params);
+    }
 }
 
 void WiFiManager::addParameter(WiFiManagerParameter *p) {
-  if(_paramsCount + 1 > WIFI_MANAGER_MAX_PARAMS)
+  if(_paramsCount + 1 > _max_params)
   {
     //Max parameters exceeded!
-	DEBUG_WM("WIFI_MANAGER_MAX_PARAMS exceeded, increase number (in WiFiManager.h) before adding more parameters!");
+	DEBUG_WM("max_params value exceeded, use WiFiManager(int max_params) constructor with a larger value!");
 	DEBUG_WM("Skipping parameter with ID:");
 	DEBUG_WM(p->getID());
 	return;
diff --git a/WiFiManager.h b/WiFiManager.h
index d86b904..2c8dece 100644
--- a/WiFiManager.h
+++ b/WiFiManager.h
@@ -65,6 +65,8 @@ class WiFiManager
 {
   public:
     WiFiManager();
+    WiFiManager(int max_params);
+    ~WiFiManager();
 
     boolean       autoConnect();
     boolean       autoConnect(char const *apName, char const *apPassword = NULL);
@@ -119,6 +121,7 @@ class WiFiManager
 
     //const String  HTTP_HEAD = "<!DOCTYPE html><html lang=\"en\"><head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"/><title>{v}</title>";
 
+    void          init(int max_params);
     void          setupConfigPortal();
     void          startWPS();
 
@@ -176,7 +179,8 @@ class WiFiManager
     void (*_apcallback)(WiFiManager*) = NULL;
     void (*_savecallback)(void) = NULL;
 
-    WiFiManagerParameter* _params[WIFI_MANAGER_MAX_PARAMS];
+    int                    _max_params;
+    WiFiManagerParameter** _params;
 
     template <typename Generic>
     void          DEBUG_WM(Generic text);