v1.3.0 to add support to RP2040-based boards

### Major Releases v1.3.0

1. Add support to RP2040-based boards, such as **RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040**, using [**Earle Philhower's arduino-pico core** v1.4.0+](https://github.com/earlephilhower/arduino-pico) to use with or without Blynk/WiFiManager features.
2. Add support to RP2040-based boards, such as **RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040**, using [**Arduino-mbed RP2040** core](https://github.com/arduino/ArduinoCore-mbed) to use without Blynk/WiFiManager features.
3. Fix bug
4. Optimize code
5. Update examples with new features

examples/RP2040_ESP8266Shield/defines.h

@@ -0,0 +1,137 @@
+/****************************************************************************************************************************
+  defines.h for RP2040_ESP8266Shield.ino
+
+  Blynk_Esp8266AT_WM is a library for the Mega, Teensy, SAM DUE and SAMD boards (https://github.com/khoih-prog/Blynk_Esp8266AT_WM)
+  to enable easy configuration/reconfiguration and autoconnect/autoreconnect of WiFi/Blynk
+  
+  Based on and Modified from Blynk library v0.6.1 https://github.com/blynkkk/blynk-library/releases
+  Built by Khoi Hoang https://github.com/khoih-prog/Blynk_Esp8266AT_WM
+  Licensed under MIT license
+ *****************************************************************************************************************************/
+
+#ifndef defines_h
+#define defines_h
+
+/* Comment this out to disable prints and save space */
+#define BLYNK_PRINT                   Serial
+
+// Debug level, 0-3
+#define BLYNK_WM_DEBUG                3
+
+#define USE_NEW_WEBSERVER_VERSION     true  //false
+#define _ESP_AT_LOGLEVEL_             0
+#define _ESP_AT_LIB_LOGLEVEL_         0
+
+/* Comment this out to disable prints and save space */
+#define DRD_GENERIC_DEBUG         true
+
+/* Comment this out to disable prints and save space */
+#define ESP_AT_DEBUG_OUTPUT       Serial
+//#define ESP_AT_LIB_DEBUG_OUTPUT   Serial
+
+#define ESP_AT_DEBUG              true
+#define ESP_AT_LIB_DEBUG          true
+
+// Uncomment to use ESP32-AT commands
+//#define USE_ESP32_AT      true
+
+// USE_ESP_AT_LIB == true to use new ESP_AT_Lib, instead of ESP8266_Lib
+// For ESP32-AT, must use ESP_AT_Lib
+#if (defined(USE_ESP32_AT) && USE_ESP32_AT )
+  #define USE_ESP_AT_LIB    true
+#else
+  #define USE_ESP_AT_LIB    true
+  //#define USE_ESP_AT_LIB    false
+#endif
+
+#if ( defined(ARDUINO_RASPBERRY_PI_PICO) || defined(ARDUINO_ADAFRUIT_FEATHER_RP2040) || defined(ARDUINO_GENERIC_RP2040) )
+  #if defined(ESP8266_AT_USE_RP2040)
+    #undef ESP8266_AT_USE_RP2040
+  #endif
+  #define ESP8266_AT_USE_RP2040      true
+#else
+  #error This code is intended to run only on the RP2040-based boards ! Please check your Tools->Board setting.
+#endif
+
+#if (ESP8266_AT_USE_RP2040)
+
+  #warning RASPBERRY_PI_PICO board selected
+
+  #if defined(ARDUINO_ARCH_MBED)
+
+    #if defined(BOARD_NAME)
+      #undef BOARD_NAME
+    #endif
+
+    #if defined(ARDUINO_RASPBERRY_PI_PICO) 
+      #define BOARD_TYPE      "MBED RASPBERRY_PI_PICO"
+    #elif defined(ARDUINO_ADAFRUIT_FEATHER_RP2040)
+      #define BOARD_TYPE      "MBED ADAFRUIT_FEATHER_RP2040"
+    #elif defined(ARDUINO_GENERIC_RP2040)
+      #define BOARD_TYPE      "MBED GENERIC_RP2040"
+    #else
+      #define BOARD_TYPE      "MBED Unknown RP2040"
+    #endif
+  #else  
+    #define BOARD_TYPE  "RASPBERRY_PI_PICO"
+  #endif
+
+  #define EspSerial       Serial1  
+
+  #define EspSerial Serial1
+
+#endif    //ESP8266_AT_USE_RP2040
+
+#ifndef BOARD_NAME
+  #define BOARD_NAME    BOARD_TYPE
+#endif
+
+//#define USE_BLYNK_WM      true
+#define USE_BLYNK_WM      false
+
+#if USE_BLYNK_WM
+  #if defined(ARDUINO_ARCH_MBED)
+    #error ARDUINO_ARCH_MBED is not supported yet because of LittleFS or EEPROM not ready. Select USE_BLYNK_WM = false.
+  #endif
+
+  #define USE_DYNAMIC_PARAMETERS                    true
+
+  #include <BlynkSimpleShieldEsp8266_RP2040_WM.h>
+#else
+  #include <BlynkSimpleShieldEsp8266_RP2040.h>
+
+  #if defined(BLYNK_INFO_DEVICE)
+    #undef BLYNK_INFO_DEVICE
+  #endif
+
+  #define BLYNK_INFO_DEVICE       BOARD_TYPE
+
+  #define USE_LOCAL_SERVER      true
+
+  #if USE_LOCAL_SERVER
+    char auth[] = "****";
+    String BlynkServer = "account.duckdns.org";
+    //String BlynkServer = "192.168.2.112";
+  #else
+    char auth[] = "****";
+    String BlynkServer = "blynk-cloud.com";
+  #endif
+
+  #define BLYNK_SERVER_HARDWARE_PORT    8080
+
+  // Your WiFi credentials.
+  char ssid[] = "****";
+  char pass[] = "****";
+
+#endif
+
+#define HOST_NAME   "RP2040_ESP_AT"
+
+// SSID and PW for Config Portal
+String portal_ssid      = "CfgPrtl-SSID";
+String portal_password  = "CfgPrtl-PW";
+
+// Your RP2040 <-> ESP8266 baud rate:
+#define ESP8266_BAUD 115200
+
+#endif      //defines_h