From 0f313761ee142f370d53fa2db5bf3857a2a49975 Mon Sep 17 00:00:00 2001
From: David McCurley <44048235+mrengineer7777@users.noreply.github.com>
Date: Mon, 4 Apr 2022 17:41:50 -0500
Subject: [PATCH] Update README.md

See https://arduinojson.org/v6/doc/upgrade/

There may be other changes necessary for AJ 6.
---
 README.md | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index d6dd3206a..7b470456b 100644
--- a/README.md
+++ b/README.md
@@ -333,7 +333,7 @@ Endpoints which consume JSON can use a special handler to get ready to use JSON
 #include "ArduinoJson.h"
 
 AsyncCallbackJsonWebHandler* handler = new AsyncCallbackJsonWebHandler("/rest/endpoint", [](AsyncWebServerRequest *request, JsonVariant &json) {
-  JsonObject& jsonObj = json.as<JsonObject>();
+  JsonObject& jsonObj = json.as<JsonObject>();    //For ArduinoJson 6 use "JsonObject jsonObj ="
   // ...
 });
 server.addHandler(handler);
@@ -735,22 +735,38 @@ response->print("</body></html>");
 request->send(response);
 ```
 
-### ArduinoJson Basic Response
+### ArduinoJson 5 Basic Response
 This way of sending Json is great for when the result is below 4KB
 ```cpp
 #include "AsyncJson.h"
 #include "ArduinoJson.h"
 
-
 AsyncResponseStream *response = request->beginResponseStream("application/json");
-DynamicJsonBuffer jsonBuffer;
+DynamicJsonBuffer jsonBuffer; //Note this buffer automatically expands
 JsonObject &root = jsonBuffer.createObject();
+
 root["heap"] = ESP.getFreeHeap();
 root["ssid"] = WiFi.SSID();
 root.printTo(*response);
 request->send(response);
 ```
 
+### ArduinoJson 6 Basic Response
+This way of sending Json is great for when the result is below 4KB
+```cpp
+#include "AsyncJson.h"
+#include "ArduinoJson.h"
+
+DynamicJsonDocument jDoc(4096);  //Note this buffer is a fixed size and cannot expand.
+String response;
+
+jDoc["heap"] = ESP.getFreeHeap();
+jDoc["ssid"] = WiFi.SSID();
+serializeJson(jdoc, response);
+request->send(response);
+request->send(200, "application/json", response);
+```
+
 ### ArduinoJson Advanced Response
 This response can handle really large Json objects (tested to 40KB)
 There isn't any noticeable speed decrease for small results with the method above
@@ -761,10 +777,9 @@ to the resulting json packets
 #include "AsyncJson.h"
 #include "ArduinoJson.h"
 
-
 AsyncJsonResponse * response = new AsyncJsonResponse();
 response->addHeader("Server","ESP Async Web Server");
-JsonObject& root = response->getRoot();
+JsonObject& root = response->getRoot();   //For ArduinoJson 6 use "JsonObject root ="
 root["heap"] = ESP.getFreeHeap();
 root["ssid"] = WiFi.SSID();
 response->setLength();
@@ -1109,7 +1124,7 @@ When sending a web socket message using the above methods a buffer is created.
 ```cpp
 void sendDataWs(AsyncWebSocketClient * client)
 {
-    DynamicJsonBuffer jsonBuffer;
+    DynamicJsonBuffer jsonBuffer;                   //For ArduinoJson 6 use DynamicJsonBuffer and skip createObject() below.
     JsonObject& root = jsonBuffer.createObject();
     root["a"] = "abc";
     root["b"] = "abcd";