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Updated NeoPixelBus object (markdown)

Michael Miller
2016-12-28 12:31:36 -08:00
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NeoPixelBus-object.md

@@ -116,6 +116,8 @@ Use this instead of Neo400KbpsMethod to force your sketch to use the Uart to sen
## NeoEsp8266AsyncUart800KbpsMethod
NeoEsp8266AsyncUart800KbpsMethod only supports the TXD1/GPIO2 pin. The Pin argument is omitted.
**CAUTION:** With this method the `Pixels()` method will return alternating pointers after each call to `Show()`; so the pointer returned should not be cached or retained between calls of `Show()`.
NOTE: Due to the varied board layouts for Esp8266, even though the pin maybe exposed, it may not be usable due to some custom feature on the board you use. If you find it not working, you should review the hardware schematic of your board and confirm the pin is not used for other purposes that interferes with it being used for NeoPixelBus.
This method uses the UART interrupt to read from a secondary buffer to send the data to the NeoPixels. It requires very little CPU overhead but does require an extra buffer similar to the Dma method.