diff --git a/doc/editor/vscode_simulator_tutorial.md b/doc/editor/vscode_simulator_tutorial.md
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+# Setting up a Prusa MK4/Mini/XL development and simulation system in Linux Ubuntu 22.03.4 and 24.04 LTS
+
+## Install Visual Studio Code
+Important: Do NOT install VS Code via Snap or otherwise you might have issues with libraries !
+
+1. go to https://code.visualstudio.com/docs/setup/linux and install the deb package
+   ```bash
+    sudo apt-get install wget gpg
+    wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > packages.microsoft.gpg
+    sudo install -D -o root -g root -m 644 packages.microsoft.gpg /etc/apt/keyrings/packages.microsoft.gpg
+    sudo sh -c 'echo "deb [arch=amd64,arm64,armhf signed-by=/etc/apt/keyrings/packages.microsoft.gpg] https://packages.microsoft.com/repos/code stable main" > /etc/apt/sources.list.d/vscode.list'
+    rm -f packages.microsoft.gpg
+   ```
+
+2. ```bash
+    sudo apt install apt-transport-https -y
+    sudo apt update -y
+    sudo apt install code -y
+
+   ```
+
+## Install compilation tools
+1. ```bash
+    sudo apt install build-essential pre-commit git libncurses5-dev libusb-1.0-0-dev pkg-config libtool freeglut3-dev libglew-dev python-is-python3 python3-venv -y
+   ```
+2. ```bash
+    git clone https://github.com/Kitware/CMake
+    cd CMake
+    mkdir build && cd build
+    ../bootstrap && make -j && sudo make install
+    cd ..
+   ```
+3. ```bash
+    sudo ln -s /usr/lib/x86_64-linux-gnu/libtinfo.so.6 /usr/lib/x86_64-linux-gnu/libtinfo.so.5
+    sudo ln -s /usr/lib/x86_64-linux-gnu/libncurses.so.6 /usr/lib/x86_64-linux-gnu/libncurses.so.5
+    sudo ln -s /usr/lib/x86_64-linux-gnu/libglut.so.3.12 /usr/lib/x86_64-linux-gnu/libglut.so.3
+    ```
+
+
+## Setup openocd
+1. ```bash
+    git clone https://github.com/ntfreak/openocd.git
+   ```
+2. ```bash
+    sudo apt install libjaylink-dev -y
+   ```
+3. ```bash
+    cd openocd
+    ./bootstrap
+   ```
+4. ```bash
+    ./configure --enable-stlink --enable-jlink
+   ```
+5. ```bash
+    make -j && sudo make install
+    cd ..
+   ```
+
+## Setup gdb-multiarch
+1. ```bash
+    sudo apt install gdb-multiarch -y
+   ```
+   In case gdb fails to start due to missing python 3.8 libraries, just link the gdb to gdb-multiarch:
+   ```bash
+    mv ./.dependencies/gcc-arm-none-eabi-13.2.1/bin/arm-none-eabi-gdb ./.dependencies/gcc-arm-none-eabi-13.2.1/bin/arm-none-eabi-gdb.bak
+    sudo ln -s /usr/bin/gdb-multiarch ./.dependencies/gcc-arm-none-eabi-13.2.1/bin/arm-none-eabi-gdb
+   ```
+
+## Get the prusa xbuddy source code
+1. ```bash
+    git clone https://github.com/prusa3d/Prusa-Firmware-Buddy
+   ```
+2. ```bash
+    cd Prusa-Firmware-Buddy
+   ```bash
+3. ```bash
+    python -m venv .venv
+   ```
+4. ```bash
+    pre-commit
+   ```
+5. ```bash
+    python ./utils/build.py --preset=mk4 --build-type=debug
+   ``` (replace mk4 here with mini or xl if needed, this will download the other requirements)
+
+
+## Start and setup Visual Studio Code
+1. Start visual studio code ("code" in shell)
+2. Press Ctrl-Shift-X to open up the extensions menu
+3. Enter in the search bar and install:
+   "Cortex Debug"
+   "Cortex Debug: Device Support Pack - STM32F4"
+   "clangd"
+   "Code Spell Checker"
+   "CMake Tools"
+   "C/C++"
+   "C/C++ Extension Pack"
+   "Python"
+   "Output Colorizer"
+
+4. Press Ctrl-Shift-P and enter "Preferences: Open User Settings (JSON)" and use the following snippet :
+   ``` {
+        "terminal.integrated.env.linux": {
+        "GTK_PATH": ""
+        },
+        }
+   ```
+
+## Setting up black-magic-probe / st-link
+1. ```bash
+    echo 'SUBSYSTEM=="usb",GROUP="users",MODE="0666"' | sudo tee -a /etc/udev/rules.d/90-usbpermission.rules
+   ```
+2. ```bash
+    sudo udevadm control --reload-rules
+   ```
+3. In VS Code, press Ctrl-Shift-P and enter "Preferences: Open User Settings (JSON)" and add the following after the commata:
+    ```
+    "cortex-debug.openocdPath":"/usr/local/bin/openocd"
+    ```
+### After the project folder has been opened, in .vscode/launch.json, add this:
+```
+        {
+            "name": "Black Magic Probe",
+            "type": "cppdbg",
+            "request": "launch",
+            "preLaunchTask": "CMake: build",
+            "cwd": "${workspaceRoot}",
+            "MIMode": "gdb",
+            "targetArchitecture": "arm",
+            "logging": {
+                "engineLogging": true
+            },
+            "program": "${workspaceRoot}/build-vscode-buddy/firmware",
+            "miDebuggerPath": "arm-none-eabi-gdb",
+            //"miDebuggerServerAddress": "/dev/ttyACM0",
+            "customLaunchSetupCommands": [
+                {
+                  "text": "cd ${workspaceRoot}"
+                },
+                {
+                  "text": "target extended-remote /dev/ttyACM0" /* replace with your COM or /dev/ttyX */
+                },
+                {
+                  "text": "monitor swdp_scan"
+                },
+                {
+                  "text": "attach 1"
+                },
+                {
+                  "text": "file ${workspaceRoot}/build-vscode-buddy/firmware"
+                },
+                {
+                  "text": "load"
+                },
+                {
+                    "text": "cd ${workspaceRoot}" /* set bath back so VScode can find source files */
+                },
+                {
+                  "text": "set mem inaccessible-by-default off"
+                },
+                {
+                  "text": "break main"
+                }
+              ],
+            "serverLaunchTimeout": 10000,
+            "windows": {
+                "miDebuggerPath": "arm-none-eabi-gdb.exe"
+            }
+        }
+```
+
+## Opening the project in VS Code
+
+1. Start VS Code
+2. Click the folder icon on the left top sidemenu : Explorer
+3. Open Folder -> Double click on "Prusa-Firmware-Buddy" Folder and press open (top right)
+4. Select "Yes, I trust the authors"
+4. In the .vscode folder, double click on launch.json and add:
+   ```
+   "showDevDebugOutput": "raw",
+   ```
+
+6. Click on the pyramid symbol (CMake), then over over the mouse on "Configure" project status, click on "[No Configure Preset Selected]", then on the pen symbol and select your Printer firmware, for example "mk4_debug_noboot".
+
+![cmake_preset](/home/bjk/Prusa-Firmware-Buddy/doc/editor/vscode_tutorial/cmake_preset.png)
+
+7. Hover over the "Build" project status and then click on the Build icon. Wait for the build to finish.
+
+![cmake_build](/home/bjk/Prusa-Firmware-Buddy/doc/editor/vscode_tutorial/build.png)
+
+
+8. Click on the Debug Symbol (sidebar, play icon) and on top, click on the drag drop window of run and debug, select "Launch simulator". Press F5.
+
+You can now use the simulator by clicking into it and using the cursor and enter keys on the keyboard to navigate. Also PrusaLink should be accessible via http://127.0.0.1:3333 in the host browser. Enjoy !
+
+![](/home/bjk/Prusa-Firmware-Buddy/doc/editor/vscode_tutorial/simulator.jpeg)
+
+If the MK4 self-test for the heater fails, try to apply the patch [here](/home/bjk/Prusa-Firmware-Buddy/doc/editor/vscode_tutorial/fan_test_patch_simulator_mk4.diff)
+
+For more details on the simulator, see [here](https://github.com/vintagepc/MINI404/wiki).
diff --git a/doc/editor/vscode_tutorial/build.png b/doc/editor/vscode_tutorial/build.png
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diff --git a/doc/editor/vscode_tutorial/cmake_preset.png b/doc/editor/vscode_tutorial/cmake_preset.png
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diff --git a/doc/editor/vscode_tutorial/fan_test_patch_simulator_mk4.diff b/doc/editor/vscode_tutorial/fan_test_patch_simulator_mk4.diff
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+diff --git a/src/common/selftest/selftest_fan.cpp b/src/common/selftest/selftest_fan.cpp
+index 6b11a8986..df96bd550 100644
+--- a/src/common/selftest/selftest_fan.cpp
++++ b/src/common/selftest/selftest_fan.cpp
+@@ -164,7 +164,11 @@ LoopResult CSelftestPart_Fan::state_measure_rpm_100_percent() {
+         result.print_fan_state = SelftestSubtestState_t::not_good;
+     }
+
++    #ifdef _DEBUG
++    const uint16_t heatbreak_fan_rpm = 8000;
++    #else
+     const uint16_t heatbreak_fan_rpm = heatbreak_fan.calculate_avg_rpm();
++    #endif
+     heatbreak_fan.evaluate(config.heatbreak_fan, heatbreak_fan_rpm);
+     if (heatbreak_fan.is_failed()) {
+         result.heatbreak_fan_state = SelftestSubtestState_t::not_good;
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