Add installation guide

installation-guide.md

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+# Installation
+
+Start Arduino as root.
+
+## Setup board
+- In `Arduino/Preferences` add `https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json` to **Additional Boards Manager URLs**.
+- In `Arduino/Tools/Boards/Boards Manager/` search for **esp32** and install it.
+- In `Arduino/Tools/Boards/ESP Arduino/` select **ESP32S2 Dev Module**.
+- In `Arduino/Tools/Port/` select **/dev/ttyUSB0**.
+
+
+
+## Add libraries
+
+### OSC
+- Download **OSC** as `.ZIP` file from https://github.com/CNMAT/OSC.git
+- In `Arduino/Sketch/Include Library/` click **Add .ZIP Library...**
+- Choose the .zip file you downloaded from the repo.
+- In `Arduino/Sketch/Include Library/` selecte **OSC**.
+
+### MPU6050
+- In `Arduino/Sketch/Include Library/Manage Libraries` serach for **MPU6050** and install it (*WARNING:* plain *MPU6050*, not any *xxxMPU5060xxx*)
+
+## Python serial
+In a terminal run:
+`sudo pip install pyserial`
+
+
+