snippets/ev3/ev3devsensor: initial examples

snippets/ev3/ev3devsensor/.gitignore

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+__pycache__/
+*.pyc
+venv/

snippets/ev3/ev3devsensor/.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/ev3devsensor/.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": "Main Example",
+			"type": "ev3devBrowser",
+			"request": "launch",
+			"program": "/home/robot/${workspaceRootFolderName}/main.py"
+		},
+		{
+			"name": "Class Example",
+			"type": "ev3devBrowser",
+			"request": "launch",
+			"program": "/home/robot/${workspaceRootFolderName}/class_example.py"
+		}
+	]
+}

snippets/ev3/ev3devsensor/.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/ev3devsensor/class_example.py

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+#!/usr/bin/env pybricks-micropython
+from pybricks.parameters import Port
+from pybricks.iodevices import Ev3devSensor
+
+
+class MySensor(Ev3devSensor):
+    """Example of extending the Ev3devSensor class."""
+
+    def __init__(self, port):
+        """Initialize the sensor."""
+
+        # Initialize the parent class.
+        super().__init__(port)
+
+        # Get the sysfs path.
+        self.path = '/sys/class/lego-sensor/sensor' + str(self.sensor_index)
+
+    def get_modes(self):
+        """Get a list of mode strings so we don't have to look them up."""
+
+        # The path of the modes file.
+        modes_path = self.path + '/modes'
+
+        # Open the modes file.
+        with open(modes_path, 'r') as m:
+
+            # Read the contents.
+            contents = m.read()
+
+            # Strip the newline symbol, and split at every space symbol.
+            return contents.strip().split(' ')
+
+
+# Initialize the sensor
+sensor = MySensor(Port.S3)
+
+# Show where this sensor can be found
+print(sensor.path)
+
+# Print the available modes
+modes = sensor.get_modes()
+print(modes)
+
+# Read mode 0 of this sensor
+val = sensor.read(modes[0])
+print(val)

snippets/ev3/ev3devsensor/main.py

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+#!/usr/bin/env pybricks-micropython
+from pybricks.parameters import Port
+from pybricks.tools import wait
+from pybricks.iodevices import Ev3devSensor
+
+# Initialize an Ev3devSensor.
+# In this example we use the
+# LEGO MINDSTORMS EV3 Color Sensor.
+sensor = Ev3devSensor(Port.S3)
+
+while True:
+    # Read the raw RGB values
+    r, g, b = sensor.read('RGB-RAW')
+
+    # Print results
+    print('R: {0}\t G: {1}\t B: {2}'.format(r, g, b))
+
+    # Wait
+    wait(200)