RGBDigit numeric display

A component for ESPHome that enables use of the RGBDigit. Similar to a TM1637, but with RGB color for each segment.

Example:

external_components:
    - source: github://calumr/rgbdigit-esphome@master

# Example configuration entry
display:
    - platform: rgbdigit
    pin: 4
    num_digits: 4
    update_interval: 0.1s
    lambda: |-
        const auto now = id(sntp_time).now();
        const char * fmt = now.second % 2 ? "%l.%M" : "%l%M";
        it.strftime(Color::WHITE, fmt, now);
        rainbow_colours(it, 4.0f, 255);

Configuration variables:

• pin (Required): The pin you have the data line hooked up to.
• num_digits (Required, integer): The number of RGBDigits.
• lambda (Optional): The lambda to use for rendering the content on the RGBDigits. See "Rendering Lambda" below for more information.
• update_interval (Optional): The interval to re-draw the screen. Defaults to 1s.
• id (Optional): Manually specify the ID used for code generation.

Rendering Lambda

The RGBDigit has a similar API to the fully fledged Display, but it's only a subset as the RGBDigit 7-segment displays don't have a concept of individual pixels. In the lambda you're passed a variable called it as with all other displays. In this case however, it is a RGBDigitDisplay instance (see API Reference).

display:
    - platform: rgbdigit
    # ...
    lambda: |-
        it.print(Color{255, 0, 0}, "12.34");    // Prints "12.34" in red
        it.set_color(2, Color{0, 255, 0});      // Sets digit 2 to green
        it.set_color(1, 7, Color{0, 0, 255});   // Sets the decimal point (segment 7) to blue

Please see Formatted Text] for a quick introduction into the printf formatting rules and Displaying Time for an introduction into the strftime time formatting.