CubeMatrix - set_seqment_rgb parameters

1

Hi,
i have a Yeelight Smart Cube and i want control the LED’s of the matrix.
But i cant find any documentation about. When the device is discovered, it reports that it supports the set_segment_rgb and update_leds methods

Which params are needed for these methods?

2

I am on the trail

{"id":1,"method":"set_segment_rgb", "params": :[255, 16743680, 0, 0, 16711680]}

This json payloads sets the matrix to line 1 = blue, line 2 = orange, line 3 & 4 = off, line 5 = red
This can be continued every device attached to the matrix are the next index of the params array
But how can i set a single point?

3

did u manage to solve this at all ?

4

Not, it seems it is not fully implemented.

5

Hey guys,

it is implemented, but the documentation makes no mention of it whatsoever. Here’s a quick rundown of how I managed to control individual LEDs on my Yeelight Matrix Cubes (I programmed a binary clock which updates the LEDs every couple seconds). It took me ages to figure that out, and the fact that this is my first Python project didn’t make it faster. But after reading lots and lots of code out there, and after even more trial and error, I finally figured it out:

1. Generate Matrix

  • Create a matrix of 25 color values. For ease of use, my code uses hex codes, but you’ll have to convert them to RGB later. So, for now, we have a string which contains of 25 #RRGGBB values.
  • Then, I have this code:

    rgb_data = "".join(
        encode_color_to_ascii((r * 65536) + (g * 256) + b)
        for color in matrix
        for r, g, b in [hex_to_rgb(color)]
    )
    set_rgb_per_led(ip, port, rgb_data)
  • My encode_color_to_ascii function:
def encode_color_to_ascii(color):
    """
    Encode color to ASCII format required by Yeelight API.
    Args:
    color (int): Color code.

    Returns:
    str: ASCII encoded color.
    """
    total_bytes = color // 64
    color = color % 64

    encoded_data = ASCII_TABLE[total_bytes // 4096]
    total_bytes = total_bytes % 4096

    encoded_data += ASCII_TABLE[total_bytes // 64]
    total_bytes = total_bytes % 64

    encoded_data += ASCII_TABLE[total_bytes]
    encoded_data += ASCII_TABLE[color]

    return encoded_data
  • My hex_to_rgb function:
def hex_to_rgb(hex_color):
    """
    Convert hex color to RGB tuple.
    Args:
    hex_color (str): Hex color code.

    Returns:
    tuple: RGB color code.
    """
    hex_color = hex_color.lstrip('#')
    return tuple(int(hex_color[i:i+2], 16) for i in (0, 2, 4))
  • The ASCII table:
ASCII_TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
  • And finally, my set_rgb_per_led function:
def set_rgb_per_led(ip, port, rgb_data):
    """
    Set RGB color per LED.
    Args:
    ip (str): IP address of the device.
    port (int): Port of the device.
    rgb_data (str): RGB data for the LEDs.
    """
    command = {
        "id": 2,
        "method": "update_leds",
        "params": [rgb_data]
    }
    send_command(ip, port, command)

Make sure your cube is in direct mode:

    command = {
        "id": 1,
        "method": "activate_fx_mode",
        "params": [{"mode": "direct"}]
    }
    send_command(ip, port, command)

…or else it won’t work.
Anyway, hope that helps! And maybe someone figures out how to control the brightness of individual LEDs on the Matrix Cube, because that was impossible for me, so far. That said, it should work because when I throw random garbage at the update_leds endpoint, I casually get random colors in random brightness, so there must be a way to achieve that.

6

wow, I’ve already given up but this is great and it works

thank you very much

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7

i added these functionality to my yeelight lib written in go

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8

I have also created a library for this in Python:

It leverages the Yeelight Python library to communicate with the CubeMatrix and allows the user to set even images on the matrices as well.

Also, for those who want to implement the communication with CubeMatrix in other libraries, there is no need to manually do that ASCII encoding as it’s just Bas64 encoding.

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