Uniplast21

Member Since: July 19, 2012

Country: United States

  • Product DEV-10864 | about 2 months ago

    As far as I know, there isn’t a built-in MAC address. When I use this shield, I just use the following lines of code:

    char mac[] = {0xZZ, 0xZZ, 0xZZ, 0xZZ, 0xZZ, 0xZZ};

    void setup() { Ethernet.begin(mac); }

    Replace the “ZZ"s in each group with whatever you want. I just chose arbitrary values and it seems to work. It should work for you too as long as you don’t use a MAC address of a device already connected to the same LAN. I don’t know what would happen if you did.

  • Product COM-12028 | about 6 months ago

    Oh of course! I’m so used to seeing these strips of LEDs use I2C that I overlooked that piece of information. Thanks for pointing it out! :)

  • Product COM-12028 | about 6 months ago

    I have a question…..So there’s 60 LEDs per meter, and you get 5 meters in this strip, which comes out to 300 LEDs. However, isn’t it standard for I2C to only support up to 8-bit addresses? If that’s true, you can only address 255 LEDs individually (256 minus address 0). The only way to support all 300 LEDs is if the WS2812 can support 9-bit addresses, but I can’t find any mention of the address size in the datasheet. Does anybody else have any information on this?

No public wish lists :(