PyCafe - Dash - Control Panel for Knob and LED Displays

app.py
requirements.txt
app.py
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import dash
from dash import html, dcc
from dash.dependencies import Input, Output
import dash_daq as daq

# Initialize the Dash app
app = dash.Dash(__name__)

# Define the app layout
app.layout = daq.DarkThemeProvider(
    children=html.Div(
        style={
            'backgroundColor': '#1a1a1a',
            'color': '#e0e0e0',
            'textAlign': 'center',
            'fontFamily': '"Droid Sans", "Lucida Sans Unicode", "Lucida Grande", Verdana, Arial, Helvetica, sans-serif',
            'padding': '50px'
        },
        children=[
            html.Div(
                daq.Knob(
                    id='my-knob',
                    min=0,
                    max=100,
                    value=0,
                    color={"default": "#FFDD44"},
                    size=150,
                    style={
                        'backgroundColor': '#333',
                        'borderRadius': '50%',
                        'padding': '20px',
                        'display': 'inline-block',
                        'margin': '20px'
                    }
                )
            ),
            html.Div(
                [
                    daq.LEDDisplay(
                        id='my-led-1',
                        value="0",
                        color="#FFDD44",
                        backgroundColor="#444",
                        style={
                            'borderRadius': '10px',
                            'padding': '10px',
                            'margin': '5px',
                            'display': 'inline-block',
                            'textAlign': 'center'
                        }
                    ),
                    daq.LEDDisplay(
                        id='my-led-2',
                        value="0",
                        color="#FFDD44",
                        backgroundColor="#444",
                        style={
                            'borderRadius': '10px',
                            'padding': '10px',
                            'margin': '5px',
                            'display': 'inline-block',
                            'textAlign': 'center'
                        }
                    ),
                    daq.LEDDisplay(
                        id='my-led-3',
                        value="0",
                        color="#FFDD44",
                        backgroundColor="#444",
                        style={
                            'borderRadius': '10px',
                            'padding': '10px',
                            'margin': '5px',
                            'display': 'inline-block',
                            'textAlign': 'center'
                        }
                    ),
                    daq.LEDDisplay(
                        id='my-led-4',
                        value="0",
                        color="#FFDD44",
                        backgroundColor="#444",
                        style={
                            'borderRadius': '10px',
                            'padding': '10px',
                            'margin': '5px',
                            'display': 'inline-block',
                            'textAlign': 'center'
                        }
                    ),
                    daq.LEDDisplay(
                        id='my-led-5',
                        value="0",
                        color="#FFDD44",
                        backgroundColor="#444",
                        style={
                            'borderRadius': '10px',
                            'padding': '10px',
                            'margin': '5px',
                            'display': 'inline-block',
                            'textAlign': 'center'
                        }
                    )
                ],
                style={'display': 'flex', 'justifyContent': 'center', 'marginBottom': '50px'}
            ),
            daq.ToggleSwitch(
                id='reset-switch',
                value=False,
                color="#FFDD44",
                label="Reset to Zero",
                labelPosition="top",
                style={'margin': '20px'}
            )
        ]
    )
)

# Define the callback to update the LEDs based on the knob value and reset switch
@app.callback(
    [Output('my-led-1', 'value'),
     Output('my-led-2', 'value'),
     Output('my-led-3', 'value'),
     Output('my-led-4', 'value'),
     Output('my-led-5', 'value')],
    [Input('my-knob', 'value'),
     Input('reset-switch', 'value')]
)
def update_leds(knob_value, reset_switch):
    if reset_switch:
        return ["0", "0", "0", "0", "0"]
    else:
        # Scale the knob value to fit within the range 00000 to 99999
        scaled_value = int((knob_value / 100) * 99999)
        # Format the scaled value as a 5-digit string with leading zeros
        formatted_value = f"{scaled_value:05d}"
        return list(formatted_value)

# Run the server
if __name__ == '__main__':
    app.run_server(debug=True)
Py.Cafe

dash-knob-led-control

Control Panel for Knob and LED Displays
