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Added hardware connection information

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Scott Lawson 2016-12-27 20:40:14 -07:00 committed by GitHub
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README.md
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@ -63,7 +63,15 @@ If `pip` is not found try using `python -m pip install` instead.
## Arduino dependencies
ESP8266 firmare is uploaded using the Arduino IDE. See [this tutorial](https://learn.sparkfun.com/tutorials/esp8266-thing-hookup-guide/installing-the-esp8266-arduino-addon) to setup the Arduino IDE for ESP8266.
cThis [ws2812b i2s library](https://github.com/JoDaNl/esp8266_ws2812_i2s) must be downloaded and installed in the Arduino libraries folder.
This [ws2812b i2s library](https://github.com/JoDaNl/esp8266_ws2812_i2s) must be downloaded and installed in the Arduino libraries folder.
# Setup / Getting Started
# 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).
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)
![feather-huzzah-pinout](images/FeatherHuzzah-small.png)
# Setup / Getting Started
Information coming soon. README is currently under active development.