diff --git a/README.md b/README.md
index 6cd8d9f..8ae8ad3 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
 
 ![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/mobizt/FirebaseClient/.github%2Fworkflows%2Fcompile_library.yml?logo=github&label=compile) [![Github Stars](https://img.shields.io/github/stars/mobizt/FirebaseClient?logo=github)](https://github.com/mobizt/FirebaseClient/stargazers) ![Github Issues](https://img.shields.io/github/issues/mobizt/FirebaseClient?logo=github)
 
-![GitHub Release](https://img.shields.io/github/v/release/mobizt/FirebaseClient) ![Arduino](https://img.shields.io/badge/Arduino-v1.4.5-57C207?logo=arduino) ![PlatformIO](https://badges.registry.platformio.org/packages/mobizt/library/FirebaseClient.svg) ![GitHub Release Date](https://img.shields.io/github/release-date/mobizt/FirebaseClient)
+![GitHub Release](https://img.shields.io/github/v/release/mobizt/FirebaseClient) ![Arduino](https://img.shields.io/badge/Arduino-v1.4.6-57C207?logo=arduino) ![PlatformIO](https://badges.registry.platformio.org/packages/mobizt/library/FirebaseClient.svg) ![GitHub Release Date](https://img.shields.io/github/release-date/mobizt/FirebaseClient)
 
 [![GitHub Sponsors](https://img.shields.io/github/sponsors/mobizt?logo=github)](https://github.com/sponsors/mobizt)
 
-Revision `2024-10-30T08:28:24Z`
+Revision `2024-10-30T03:51:10Z`
 
 ## Table of Contents
 
@@ -3096,7 +3096,7 @@ FIREBASE_DISABLE_NATIVE_ETHERNET // For disabling native (sdk) Ethernet function
 ENABLE_ASYNC_TCP_CLIENT // For Async TCP Client usage.
 FIREBASE_ASYNC_QUEUE_LIMIT // For maximum async queue limit setting for an async client.
 FIREBASE_PRINTF_PORT // For Firebase.printf debug port.
-FIREBASE_PRINTF_BUFFER // Firebase.printf buffer size.
+FIREBASE_PRINTF_BUFFER // Firebase.printf buffer size. The default printf buffer size is 1024 for ESP8266 and SAMD otherwise 4096. Some debug message may be truncated for larger text.
 ```
 
 You can assign the optional build options using one of the following methods.
diff --git a/library.json b/library.json
index deae3a7..67cc294 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "FirebaseClient",
-  "version": "1.4.5",
+  "version": "1.4.6",
   "keywords": "communication, REST, esp32, esp8266, arduino",
   "description": "Async Firebase Client library for Arduino.",
   "repository": {
diff --git a/library.properties b/library.properties
index 92c9f56..06631df 100644
--- a/library.properties
+++ b/library.properties
@@ -1,6 +1,6 @@
 name=FirebaseClient
 
-version=1.4.5
+version=1.4.6
 
 author=Mobizt
 
diff --git a/src/Config.h b/src/Config.h
index 3433bb2..2edae55 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -124,7 +124,8 @@
  * 🏷️ For Firebase.printf debug port.
  * #define FIREBASE_PRINTF_PORT Serial
  * 
- * * 🏷️ For Firebase.printf buffer size.
+ * * 🏷️ For Firebase.printf buffer size. 
+ * The default printf buffer size is 1024 for ESP8266 and SAMD otherwise 4096.
  * #define FIREBASE_PRINTF_BUFFER 2048
  */
 
diff --git a/src/FirebaseClient.h b/src/FirebaseClient.h
index e7374e1..4ff20a1 100644
--- a/src/FirebaseClient.h
+++ b/src/FirebaseClient.h
@@ -253,8 +253,12 @@ namespace firebase
 #if defined(FIREBASE_PRINTF_BUFFER)
             int size = FIREBASE_PRINTF_BUFFER;
 #else
-            // Default buffer size for large JSON response.
+// Default buffer size for large JSON response.
+#if defined(ARDUINO_ARCH_SAMD) || defined(ESP8266)
+            int size = 1024;
+#else
             int size = 4096;
+#endif
 #endif
             char s[size];
             va_list va;
diff --git a/src/core/Core.h b/src/core/Core.h
index 96254ab..7ec40ee 100644
--- a/src/core/Core.h
+++ b/src/core/Core.h
@@ -7,7 +7,7 @@
 #undef FIREBASE_CLIENT_VERSION
 #endif
 
-#define FIREBASE_CLIENT_VERSION "1.4.5"
+#define FIREBASE_CLIENT_VERSION "1.4.6"
 
 static void sys_idle()
 {