Updated API Reference (markdown)

API-Reference.md

@@ -138,6 +138,53 @@ const char* value2 = array.get(2); // returns NULL
 ##### Example
 ```c++
 ```
+
+## JsonArray::printTo()
+
+### Description
+
+Serialize the array to a JSON string.
+
+This will create a compact JSON, if you want a pretty JSON with spaces and line breaks, use `JsonArray::prettyPrint()`
+
+### Signatures
+
+```c++
+size_t printTo(char* buffer, size_t size) const;
+size_t printTo(Print &) const;
+size_t printTo(String &) const;
+```
+
+### Arguments
+
+The destination of the JSON string.
+
+Can be either:
+
+* a `buffer` with specified `size`
+* an implementation of `Print` (like `Serial`, `EthernetClient`...)
+* a `String` 
+
+### Return value
+
+The number of bytes written
+
+### Example
+
+```c++
+StaticJsonBuffer<200> jsonBuffer;
+JsonArray& array = jsonBuffer.createArray();
+array.add("hello");
+array.add("world");
+array.printTo(Serial);
+```
+
+will write the following string to the serial output:
+
+```json
+["hello","world"]
+```
+
 #### JsonArray::removeAt()
 ##### Description
 Removes element at specified index.