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Clarified minor hardware connections point in README

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Scott Lawson 2016-12-27 21:47:37 -07:00
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@ -68,6 +68,8 @@ This [ws2812b i2s library](https://github.com/JoDaNl/esp8266_ws2812_i2s) must be
# Hardware Connections
The ESP8266 has hardware support for [I²S](https://en.wikipedia.org/wiki/I%C2%B2S) and this peripheral is used by the [ws2812b i2s library](https://github.com/JoDaNl/esp8266_ws2812_i2s) to control the ws2812b LED strip. This signficantly improves performance compared to bit-banging the IO pin. Unfortunately, this means that the LED strip **must** be connected to the RX1 pin, which is not accessible in some ESP8266 modules (such as the ESP-01).
The RX1 pin on the ESP8266 module should be connected to the data input pin of the ws2812b LED strip (often labelled DIN or D0).
For the NodeMCU v3 and Adafruit Feather HUZZAH, the location of the RX1 pin is shown in the images below. Many other modules also expose the RX1 pin.
![nodemcu-pinout](images/NodeMCUv3-small.png)