snippets/ev3/uart_basics: add snippet

snippets/ev3/uart_basics/.gitignore

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+__pycache__/
+*.pyc
+venv/

snippets/ev3/uart_basics/.vscode/extensions.json

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+{
+	// See http://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"lego-education.ev3-micropython"
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": [
+		"ms-python.python"
+	]
+}

snippets/ev3/uart_basics/.vscode/launch.json

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+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Download and Run",
+			"type": "ev3devBrowser",
+			"request": "launch",
+			"program": "/home/robot/${workspaceRootFolderName}/main.py"
+		}
+	]
+}

snippets/ev3/uart_basics/.vscode/settings.json

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+// Place your settings in this file to overwrite default and user settings.
+{
+	"files.eol": "\n",
+	"debug.openDebug": "neverOpen",
+	"python.linting.enabled": false
+}

snippets/ev3/uart_basics/main.py

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+#!/usr/bin/env pybricks-micropython
+from pybricks.hubs import EV3Brick
+from pybricks.tools import print
+from pybricks.customdevices import UARTDevice
+from pybricks.media.ev3dev import SoundFile
+
+# Initialize the EV3
+ev3 = EV3Brick()
+
+# Initialize sensor port 2 as a uart device
+ser = UARTDevice(ev3.Port.S2, baudrate=115200)
+
+# Write some data
+ser.write(b'\r\nHello, world!\r\n')
+
+# Play a sound while we wait for some data
+for i in range(3):
+    ev3.speaker.play(SoundFile.HELLO)
+    ev3.speaker.play(SoundFile.GOOD)
+    ev3.speaker.play(SoundFile.MORNING)
+    print("Bytes waiting to be read:", ser.waiting())
+
+# Read all data received while the sound was playing
+data = ser.read_all()
+print(data)