diff --git a/index.html b/index.html
index 773e2ab..67ede74 100644
--- a/index.html
+++ b/index.html
@@ -118,6 +118,13 @@
         formatUpdated: "{YYYY}-{MM}-{DD} {HH}:{mm}",
         whereToPlace: "top",
       },
+      tabs: {
+        persist: true, // default
+        sync: true, // default
+        theme: 'classic', // default
+        tabComments: true, // default
+        tabHeadings: true // default
+      },
     };
   </script>
 
@@ -184,6 +191,15 @@
   <!----- Last time updated ----->
   <script src="https://cdn.jsdelivr.net/npm/docsify-updated/src/time-updater.js"></script>
 
+  <!-- docsify-tabs (latest v1.x.x) -->
+  <script src="https://cdn.jsdelivr.net/npm/docsify-tabs@1"></script>
+  <style>
+    :root {
+      --docsifytabs-border-color: #ededed;
+      --docsifytabs-tab-highlight-color: purple;
+    }
+  </style>
+
 
 </body>
 </html>
diff --git a/nRF/README.md b/nRF/README.md
new file mode 100644
index 0000000..c2fcb71
--- /dev/null
+++ b/nRF/README.md
@@ -0,0 +1,6 @@
+<header><h1>
+Nordic - nRF
+</h1></header>
+
+----------
+
diff --git a/nRF/medias/GDB_settings.png b/nRF/medias/GDB_settings.png
new file mode 100644
index 0000000..65a6ca5
Binary files /dev/null and b/nRF/medias/GDB_settings.png differ
diff --git a/nRF/nRF_development_environment.md b/nRF/nRF_development_environment.md
new file mode 100644
index 0000000..9d607bc
--- /dev/null
+++ b/nRF/nRF_development_environment.md
@@ -0,0 +1,260 @@
+<header><h1>
+nRF Development Environment
+</h1></header>
+
+----------
+
+Here you'll find some information for setting up the nRF development environment.
+We'll see more on detail how to set up the environment for Linux and program the nRF52 with Zephyr on CLion.
+
+# 1. Installing the nRF Connect SDK & Toolchain
+<!-- tabs:start -->
+#### **Linux**
+1. Install the `libfuse2` library
+   ```bash
+    sudo apt install libfuse2
+    ```
+2. Download the [nRF Connect for Desktop](https://www.nordicsemi.com/Products/Development-tools/nrf-connect-for-desktop)
+3. Make the file executable
+   ```bash 
+   chmod a+x nrfconnect-*.appimage
+   ```
+4. Run the appimage (double-click on nrfconnect)
+   - If it asks for update, click "yes"
+   - If it asks is you want to help them improve the app, I recommend declining it.
+   - If it asks is you want to start the "Quick Start" app, click "Close"
+5. Install necessary tools
+   - Toolchain Manager
+   - Programmer
+6. Open the toolchain manager and install "nRF Connect SDK v2.6.0"
+   - Confirm the installation directory by clicking "Continue installation"
+   - Wait for the toolchain to download and install. (this may take a while)
+   - You can close the toolchain manager now
+7. Download [nRF-udev](https://github.com/NordicSemiconductor/nrf-udev/releases/download/v1.0.1/nrf-udev_1.0.1-all.deb)
+   and install the nRF udev
+   ```bash
+   sudo dpkg -i nrf-udev_1.0.1-all.deb
+   ```
+8. Install [JLink](https://www.segger.com/downloads/jlink/JLink_Linux_x86_64.deb) and install it
+   ```bash
+   sudo dpkg -i JLink_Linux_*_x86_64.deb
+   ```
+
+#### **Windows**
+Use Linux or WSL
+
+#### **WSL**
+Cry
+
+<!-- tabs:end -->
+
+# Installing Zephyr [↗](https://builds.zephyrproject.io/zephyr/pr/60204/docs/develop/getting_started/index.html)
+Zephyr is an open-source real-time operating system (RTOS) that is designed to be small, scalable, and secure for use
+on resource-constrained systems.
+It is a Linux Foundation project and is governed by a Technical Steering Committee (TSC).
+
+## Install dependencies
+
+| Tool                | Min. Version |
+|---------------------|--------------|
+| CMake               | 3.20.5       |
+| Python              | 3.8          |
+| Devicetree compiler | 1.4.6        |
+
+<!-- tabs:start -->
+#### **Linux**
+
+1. You'll probably need to update your package list
+```bash
+wget https://apt.kitware.com/kitware-archive.sh
+sudo bash kitware-archive.sh
+sudo apt update
+```
+
+2. Use apt to install the required dependencies:
+```bash
+sudo apt install --no-install-recommends git cmake ninja-build gperf \
+ccache dfu-util device-tree-compiler wget \
+python3-dev python3-pip python3-setuptools python3-tk python3-wheel xz-utils file \
+make gcc gcc-multilib g++-multilib libsdl2-dev libmagic1
+```
+
+3. Verify the versions of the main dependencies installed on your system
+```bash
+cmake --version
+python3 --version
+dtc --version
+```
+
+#### **Windows**
+Use Linux or WSL
+
+#### **WSL**
+Cry
+
+<!-- tabs:end -->
+
+## Get Zephyr and install Python dependencies
+
+We'll see here only how to install within virtual environment because for CLion we'll need to use the virtual environment.
+
+<!-- tabs:start -->
+#### **Linux**
+1. Install Python venv package
+```bash
+sudo apt install python3-venv
+```
+
+2. Create a new virtual environment
+```bash
+python3 -m venv ~/zephyrproject/.venv
+```
+
+3. Activate the virtual environment
+```bash
+source ~/zephyrproject/.venv/bin/activate
+```
+Once activated your shell will be prefixed with `(.venv)`. The virtual environment can be deactivated at any time by running `deactivate`.
+
+4. Install west
+```bash
+pip install west
+```
+
+5. Get the Zephyr source code
+```bash
+west init ~/zephyrproject
+cd ~/zephyrproject
+west update
+```
+
+6. Export a [Zephyr CMake package](https://builds.zephyrproject.io/zephyr/pr/60204/docs/build/zephyr_cmake_package.html#cmake-pkg).
+This allows CMake to automatically load boilerplate code required for building Zephyr applications.
+```bash
+west zephyr-export
+```
+
+7. Zephyr’s `scripts/requirements.txt` file declares additional Python dependencies.
+```bash
+pip install -r ~/zephyrproject/zephyr/scripts/requirements.txt
+```
+
+#### **Windows**
+Use Linux or WSL
+
+#### **WSL**
+Cry
+
+<!-- tabs:end -->
+
+## Install the Zephyr SDK
+
+<!-- tabs:start -->
+#### **Linux**
+
+1. Download and verify the [Zephyr SDK bundle](https://github.com/zephyrproject-rtos/sdk-ng/releases/tag/v0.16.5-1)
+   ```bash
+   cd ~
+   wget https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.16.5-1/zephyr-sdk-0.16.5-1_linux-x86_64.tar.xz
+   wget -O - https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.16.5-1/sha256.sum | shasum --check --ignore-missing
+   ```
+2. Extract the Zephyr SDK bundle archive:
+   ```bash
+   tar xf zephyr-sdk-0.16.5-1_linux-x86_64.tar.xz
+   ```
+3. Run the Zephyr SDK bundle setup script
+   ```bash
+   ~/zephyr-sdk-0.16.5-1_linux-x86_64/install.sh
+   ```
+   You only need to run the setup script once after extracting the Zephyr SDK bundle. 
+   You must rerun the setup script if you relocate the Zephyr SDK bundle directory after the initial setup.
+4. Install udev rules, which allow you to flash most Zephyr boards as a regular user.
+   ```bash
+   sudo cp ~/zephyr-sdk-0.16.5-1/sysroots/x86_64-pokysdk-linux/usr/share/openocd/contrib/60-openocd.rules /etc/udev/rules.d
+   sudo udevadm control --reload
+   ```
+
+
+#### **Windows**
+Use Linux or WSL
+
+#### **WSL**
+Cry
+
+<!-- tabs:end -->
+
+# Configure CLion for Zephyr [↗](https://builds.zephyrproject.io/zephyr/pr/60204/docs/develop/tools/clion.html#clion)
+
+<!-- tabs:start -->
+#### **Linux**
+
+1. Create new Toolchain
+   1. Open CLion, go to `File` > `Settings` > `Build, Execution, Deployment` > `Toolchain`
+   2. Create a new `Zephyr` toolchain
+   3. `Add environment ‣ From file` and select `~/zephyrproject/.venv/bin/activate`.
+2. Create a new project in `~/zephyrproject/zephyr/myApps/<my_project_name>`
+3. On CMake profile setting dialog, set the following:
+   - `Name`: `Zephyr`
+   - `Toolchain`: `Zephyr`
+   - `CMake options`: `-DBOARD=nrf52840dk_nrf52840` (or other board you want to use)
+4. Create the project configuration file (`prj.conf`):
+   ```
+   CONFIG_PRINTK=y
+   CONFIG_GPIO=y
+   CONFIG_DEBUG_THREAD_INFO=y
+   CONFIG_THREAD_RUNTIME_STATS=y
+   CONFIG_DEBUG_OPTIMIZATIONS=y
+   ```
+5. Create a new `main.c` file in the `src` directory. For example: 
+   ```c
+   #include <stdio.h>
+   #include <zephyr/kernel.h>
+   #include <zephyr/drivers/gpio.h>
+   
+   #define LED0_NODE DT_ALIAS(led0)
+   static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
+   
+   int main(void){
+   int ret;
+   bool led_state = true;
+   if (!gpio_is_ready_dt(&led)) return 0;
+   
+       ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
+       if (ret < 0) return 0;
+   
+       while (1) {
+           ret = gpio_pin_toggle_dt(&led);
+           if (ret < 0) return 0;
+           led_state = !led_state;
+           printf("LED state: %s\n", led_state ? "ON" : "OFF");
+           k_msleep(1000);
+       }
+   }
+   ```
+6. Create the `CMakeLists.txt` file in the root of the project
+   ```cmake
+   cmake_minimum_required(VERSION 3.13.1)
+   find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+   project(my_project_name)
+   target_sources(app PRIVATE src/main.c)
+   ```
+
+7. Enable RTOS integration
+   1. Go to `Settings ‣ Build, Execution, Deployment ‣ Embedded Development ‣ RTOS Integration`.
+   2. Set the Enable RTOS Integration checkbox. You can leave the option set to `Auto`. CLion will detect Zephyr automatically.
+
+8. Configure the debugger
+   1. Go to `Run ‣ New Embedded Configuration`.
+   2. Set the GDB settings:
+      ![GDB settings](medias/GDB_settings.png)
+   3. Select your board and click `OK`.
+9. Build and debug the project
+
+#### **Windows**
+Use Linux or WSL
+
+#### **WSL**
+Cry
+
+<!-- tabs:end -->
+