Update README.md

Author: khoih-prog

README.md

@@ -128,7 +128,7 @@ The catch is **your function is now part of an ISR (Interrupt Service Routine),
 ## Prerequisites
 
  1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
- 2. [`ArduinoCore-mbed mbed_portenta core 2.7.2+`](https://github.com/arduino/ArduinoCore-mbed) for Arduino **Portenta_H7** boards, such as **Portenta_H7 Rev2 ABX00042, etc.**. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-mbed.svg)](https://github.com/arduino/ArduinoCore-mbed/releases/latest)
+ 2. [`ArduinoCore-mbed mbed_portenta core 3.4.1+`](https://github.com/arduino/ArduinoCore-mbed) for Arduino **Portenta_H7** boards, such as **Portenta_H7 Rev2 ABX00042, etc.**. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-mbed.svg)](https://github.com/arduino/ArduinoCore-mbed/releases/latest)
 
 ---
 ---
@@ -188,12 +188,12 @@ Check the new [**multiFileProject** example](examples/multiFileProject) for a `H
 
 #### 1. For Portenta_H7 boards using Arduino IDE in Linux
 
-  **To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.)**, you have to copy the file [portenta_post_install.sh](Packages_Patches/arduino/hardware/mbed_portenta/2.7.2/portenta_post_install.sh) into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/2.7.2/portenta_post_install.sh). 
+  **To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.)**, you have to copy the file [portenta_post_install.sh](Packages_Patches/arduino/hardware/mbed_portenta/3.4.1/portenta_post_install.sh) into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1/portenta_post_install.sh). 
 
   Then run the following command using `sudo`
 
 ```
-$ cd ~/.arduino15/packages/arduino/hardware/mbed_portenta/2.7.2
+$ cd ~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1
 $ chmod 755 portenta_post_install.sh
 $ sudo ./portenta_post_install.sh
 ```
@@ -206,9 +206,9 @@ This will create the file `/etc/udev/rules.d/49-portenta_h7.rules` as follows:
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2341", ATTRS{idProduct}=="035b", GROUP="plugdev", MODE="0666"
 ```
 
-Supposing the ArduinoCore-mbed core version is 2.7.2. Now only one file must be copied into the directory:
+Supposing the ArduinoCore-mbed core version is 3.4.1. Now only one file must be copied into the directory:
 
-- `~/.arduino15/packages/arduino/hardware/mbed_portenta/2.7.2/portenta_post_install.sh`
+- `~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1/portenta_post_install.sh`
 
 Whenever a new version is installed, remember to copy this files into the new version directory. For example, new version is x.yy.zz