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# HUB75 LED matrix library for the ESP32, utilising DMA
This ESP32 Arduino library for an 64x32 RGB LED (HUB 75 type) 1/16 Scan LED Matrix Panel, utilises the DMA functionality provided by the ESP32's I2S 'LCD Mode' which basically means that pixel data is sent straight from memory, via the DMA controller, to the relevant LED Matrix GPIO pins with little CPU overhead.
This ESP32 Arduino library for HUB75 / HUB75E connector type 64x32 RGB LED 1/16 Scan OR 64x64 RGB LED 1/32 Scan LED Matrix Panel, utilises the DMA functionality provided by the ESP32's I2S 'LCD Mode' which basically means that pixel data is sent straight from memory, via the DMA controller, to the relevant LED Matrix GPIO pins with little CPU overhead.
As a result, this library can theoretically provide ~16-24 bit colour, at various brightness levels without noticeable flicker.
## Panels Supported
62x32 pixel 1/16 Scan LED Matrix 'Indoor' Panel, such as this [typical RGB panel available for purchase](https://www.aliexpress.com/item/256-128mm-64-32-pixels-1-16-Scan-Indoor-3in1-SMD2121-RGB-full-color-P4-led/32810362851.html).
* 62x32 pixel 1/16 Scan LED Matrix 'Indoor' Panel, such as this [typical RGB panel available for purchase](https://www.aliexpress.com/item/256-128mm-64-32-pixels-1-16-Scan-Indoor-3in1-SMD2121-RGB-full-color-P4-led/32810362851.html).
* 62x64 pixel 1/13 Scan LED Matrix 'Indoor' Panel.
* FM6126 panels based on [this example](/examples/FM6126Panel) will also work with the correct initialisation.
## Panels Not Supported
* 1/8 Scan LED Matrix Panels are not supported, please use an alternative library if you bought one of these.
* Chinese junk panels based on FMXXXX chipsets. This library does not support these panels. FM6126 panels based on [this untested example](/examples/FM6126Panel) could work however.
* Panels with a resolution of less than 64x32pixels and/or scan rate != 1/32 or 1/16
# Installation