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node-red-nodes/hardware/Pibrella/README.md
Dave C-J 0ff8648258 New Pibrella node - Can use softpwm on all outputs.
Buzzer no longer breaks audio.
2014-12-26 15:24:21 +00:00

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node-red-node-pibrella
======================
A <a href="http://nodered.org" target="_new">Node-RED</a> node to control a <a href="http://pibrealla.com/" target="_new">Pibrella</a> add-on board for a Raspberry-Pi.
Install
-------
Run the following command in the root directory of your Node-RED install
npm install node-red-node-pibrella
Pre-reqs
--------
Requires the RPi.PIO python library version 0.5.8 (or better) in order to work. See the <a href="https://pypi.python.org/pypi/RPi.GPIO" target="new">RPi.GPIO site</a> for mode details.
sudo apt-get -y install python-rpi.gpio
Usage
-----
A pair of input and output Node-RED nodes for the Raspberry Pi Pibrella from Pimoroni.
###Output
The output node will set the selected output high (on) or low (off) depending on the value passed in. Expects a <b>msg.payload</b> with either a 0 or 1 (or true or false).
You may also select PWM mode to dim the on board LEDs if you wish. Expects a value from 0 to 100.
The Buzzer expects a number representing the frequency in Hz. 0 is off and 1 is a tone - so you can use 0/1 type inputs as well.
###Input
The input node generates a <b>msg.payload</b> with either a 0 or 1 depending on the state of the input pin.
The <b>msg.topic</b> is set to <i>pibrella/{the pin id}</i> - which will be A, B, C, D or R.