Created a new branch from main and added initial stuff for week 4

docs/group_assignments/group2/assignment4.md

+---
+title: Test assignment
+summary: A brief description of my document.
+show_authors: true
+authors:
+    - name: Akseli Uunila
+      url: https://gitlab.fabcloud.org/academany/fabacademy/2023/labs/oulu/students/akseli-uunila
+    - name: Abhishek Kumar
+	  url: https://gitlab.fabcloud.org/academany/fabacademy/2023/labs/oulu/students/abhishek-kumar/
+    - name: Aarne Pohjonen
+      url: https://fabacademy.org/2023/labs/oulu/students/aarne-pohjonen/
+---
+
+# Group work for week 4
+
+##
+
+![oscilloscope measurement](./assets/assignment4/oscilloscope/RP2040.png)
+
+![oscilloscope measurement](./assets/assignment4/oscilloscope/ESP32C3.png)
+
+![oscilloscope measurement](./assets/assignment4/oscilloscope/SAMD21.png)
+
+[rp2040 schematic](https://files.seeedstudio.com/wiki/XIAO-RP2040/res/rp2040_datasheet.pdf)
+
+[esp32C3 schematic](https://files.seeedstudio.com/wiki/XIAO_WiFi/Resources/Seeeduino-XIAO-ESP32C3-SCH.pdf)
+
+[samd21 schematic](https://files.seeedstudio.com/wiki/Seeeduino-XIAO/res/Seeeduino-XIAO-v1.0-SCH-191112.pdf)
\ No newline at end of file