add Submenu readme and test

Author: samuelnguyen999

README.md

@@ -14,8 +14,10 @@ Update the `TankController` code from C++ to Python and run on a Raspberry Pico.
 
 To set up and run this project, the system must meet the following requirements:
 
-- **uv**: The python project package manager must be installed. Learn more at [https://docs.astral.sh/uv/](https://docs.astral.sh/uv/).
-- **tkinter**: The Python GUI to test locally. Often installed separately.
+- **uv**: The python project package manager must be installed. Learn more at [https://docs.astral.sh/uv/](https://docs.astral.sh/uv/).  
+Format contributions with `uv run black .`
+- **tkinter**: The Python GUI to test locally. Often installed separately as `python3-tk`.  
+Verify with `python -m tkinter`. A small GUI window should appear if Tkinter is installed correctly.
 
 ### Mac Requirements
 
@@ -33,6 +35,26 @@ To run in a local environment with mocked devices (with the UI State Machine int
 ./run_gui.sh
 ```
 
+## Features
+
+| View Commands           | Set Commands        |
+| ----------------------- | ------------------- |
+| View IP and MAC         | pH calibration      |
+| View free memory        | Clear pH calibra    |
+| View Google mins        | Clear Temp calib    |
+| View log file           | Set chill/heat      |
+| View pH slope           | Set Google mins     |
+| View PID                | Set KD              |
+| View tank ID            | Set KI              |
+| View temp cal           | Set KP              |
+| View time               | Set pH target       |
+| View version            | Set pH w sine       |
+|                         | Set Temp w sine     |
+|                         | PID on/off          |
+|                         | Set Tank ID         |
+|                         | Temp calibration    |
+|                         | Set temperature     |
+|                         | Set date/time       |
 
 ## Testing
 

test/ui_state/main_menu_test.py

@@ -157,3 +157,27 @@ def test_loop(print_mock):
             mock.call("<4   ^2  8v   6>", line=2),
         ]
     )
+
+
+@mock.patch.object(LiquidCrystal, "print")
+def test_sub_menu_access(print_mock):
+    """
+    The function to test access to MainMenu sub menu features
+    """
+    main_menu = MainMenu(Titrator())
+
+    # Verify all view menu entries
+    main_menu.level1 = 1
+    for index, label in enumerate(main_menu.view_menus):
+        print_mock.reset_mock()
+        main_menu.level2 = index
+        main_menu.loop()
+        print_mock.assert_any_call(label, line=1)
+
+    # Verify all set menu entries
+    main_menu.level1 = 2
+    for index, label in enumerate(main_menu.set_menus):
+        print_mock.reset_mock()
+        main_menu.level2 = index
+        main_menu.loop()
+        print_mock.assert_any_call(label, line=1)