Replaced printTo() with serializeJson()

* Added `serializeJson()` and `serializeJsonPretty()`
* Added `measureJson()` and `measureJsonPretty()`
* Removed `printTo()` and `prettyPrintTo()`
* Removed `measureLength()` and `measurePrettyLength()`

examples/JsonConfigFile/JsonConfigFile.ino

@@ -72,7 +72,7 @@ void saveConfiguration(const char *filename, const Config &config) {
   root["port"] = config.port;
 
   // Serialize JSON to file
-  if (root.printTo(file) == 0) {
+  if (serializeJson(root, file) == 0) {
     Serial.println(F("Failed to write to file"));
   }
 

examples/JsonGeneratorExample/JsonGeneratorExample.ino

@@ -38,13 +38,13 @@ void setup() {
   data.add(48.756080);
   data.add(2.302038);
 
-  root.printTo(Serial);
+  serializeJson(root, Serial);
   // This prints:
   // {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}
 
   Serial.println();
 
-  root.prettyPrintTo(Serial);
+  serializeJsonPretty(root, Serial);
   // This prints:
   // {
   //   "sensor": "gps",

examples/JsonServer/JsonServer.ino

@@ -76,7 +76,7 @@ void loop() {
   }
 
   Serial.print(F("Sending: "));
-  root.printTo(Serial);
+  serializeJson(root, Serial);
   Serial.println();
 
   // Write response headers
@@ -86,7 +86,7 @@ void loop() {
   client.println();
 
   // Write JSON document
-  root.prettyPrintTo(client);
+  serializeJsonPretty(root, client);
 
   // Disconnect
   client.stop();

examples/JsonUdpBeacon/JsonUdpBeacon.ino

@@ -72,11 +72,11 @@ void loop() {
   Serial.print(remoteIp);
   Serial.print(F(" on port "));
   Serial.println(remotePort);
-  root.printTo(Serial);
+  serializeJson(root, Serial);
 
   // Send UDP packet
   udp.beginPacket(remoteIp, remotePort);
-  root.printTo(udp);
+  serializeJson(root, udp);
   udp.println();
   udp.endPacket();
 

examples/StringExample/StringExample.ino

@@ -54,7 +54,7 @@ void setup() {
 
   // Lastly, you can print the resulting JSON to a String
   String output;
-  root.printTo(output);
+  serializeJson(root, output);
 }
 
 void loop() {