Updated FAQ (markdown)

FAQ.md

@@ -13,6 +13,7 @@
   - [How to write a function that works with both `JsonArray` and `JsonObject`?](#how-to-write-a-function-that-works-with-both-jsonarray-and-jsonobject)
   - [How to assign a `JsonArray` or `JsonObject`?](#how-to-assign-a-jsonarray-or-jsonobject)
 - [Part 2 - Serialization questions](#part-2---serialization-questions)
+  - [Why some parts are missing?](#why-some-parts-are-missing)
   - [How to compute the JSON length?](#how-to-compute-the-json-length)
   - [How to create complex nested objects?](#how-to-create-complex-nested-objects)
   - [The first serialization succeeds, why do the next ones fail?](#the-first-serialization-succeeds-why-do-the-next-ones-fail)
@@ -182,7 +183,7 @@ See issues [#160](https://github.com/bblanchon/ArduinoJson/issues/160), [#203](h
 
 ### How to reuse a `JsonBuffer`?
 
-`StaticJsonBuffer` and `DynamicJsonBuffer` are designed to be throwaway memory pools, they are not intended to be reused. 
+`StaticJsonBuffer` and `DynamicJsonBuffer` are designed to be throwaway memory pools, they are not intended to be reused.
 As a consequence, using a global `JsonBuffer` is almost always a bad idea.
 
 If you believe you need to reuse a `JsonBuffer`, it's because [you're not using the library correctly](https://github.com/bblanchon/ArduinoJson/wiki/FAQ#whats-the-best-way-to-use-the-library).
@@ -193,7 +194,7 @@ Imagine a `clear()` function is available, someone could write:
 
 ```c++
 JsonObject& myObject = jsonBuffer.createObject();
-jsonBuffer.clear(); 
+jsonBuffer.clear();
 JsonArray& myArray = jsonBuffer.createArray();
 ```
 
@@ -292,7 +293,7 @@ void myFunction(JsonVariant variant)
         JsonArray& array = variant;
         // ...
     }
-    else if (variant.is<JsonObject&>()) 
+    else if (variant.is<JsonObject&>())
     {
         JsonObject& object = variant;
         // ...
@@ -336,6 +337,21 @@ See issues [#341](https://github.com/bblanchon/ArduinoJson/issues/341) and [#343
 ## Part 2 - Serialization questions
 
 
+### Why some parts are missing?
+
+Example: you want to write `{"p1":[0, 1]}`, but instead you get `{"p1":[]}`.
+
+This is because the `StaticJsonBuffer` too small.
+
+Solution: Increase the size of the `StaticJsonBuffer` or switch to a `DynamicJsonBuffer`.
+
+See also:
+
+* [What are the differences between StaticJsonBuffer and DynamicJsonBuffer?](#what-are-the-differences-between-staticjsonbuffer-and-dynamicjsonbuffer)
+* [How to determine the buffer size?](#how-to-determine-the-buffer-size)
+* [JsonBuffer size calculator](https://rawgit.com/bblanchon/ArduinoJson/master/scripts/buffer-size-calculator.html)
+* Issue [#360](https://github.com/bblanchon/ArduinoJson/issues/360)
+
 
 ### How to compute the JSON length?
 
@@ -731,11 +747,11 @@ But you can enumerate all the key-value pairs in the object, by using iterators:
 char json[] = "{\"key\":\"value\"}";
 JsonObject& object = jsonBuffer.parseObject(json);
 
-for(JsonObject::iterator it=object.begin(); it!=object.end(); ++it) 
+for(JsonObject::iterator it=object.begin(); it!=object.end(); ++it)
 {
     const char* key = it->key;
 
-    if (it->value.is<char*>()) {        
+    if (it->value.is<char*>()) {
         const char* value = it->value;
         // ...
     }
@@ -776,4 +792,4 @@ ssid = network["ssid"].as<const char*>();
 ssid = network["ssid"].as<String>();
 ```
 
-See issue [#118](https://github.com/bblanchon/ArduinoJson/issues/118), [#146](https://github.com/bblanchon/ArduinoJson/issues/146) and [#197](https://github.com/bblanchon/ArduinoJson/issues/197).
+See issue [#118](https://github.com/bblanchon/ArduinoJson/issues/118), [#146](https://github.com/bblanchon/ArduinoJson/issues/146) and [#197](https://github.com/bblanchon/ArduinoJson/issues/197).