2014-07-25 11:07:23 +02:00
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node-red-node-piliter
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=====================
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A <a href="http://nodered.org" target="_new">Node-RED</a> node to control a Pimorini Pi-LITEr 8 LED add-on board for a Raspberry-Pi.
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Install
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-------
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2016-03-02 14:25:52 +01:00
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Run the following command in your Node-RED user directory - typically `~/.node-red`
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2014-07-25 11:07:23 +02:00
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npm install node-red-node-piliter
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Pre-reqs
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--------
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2015-01-06 15:54:45 +01:00
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Requires the python RPi.GPIO library v0.58 (or better) to be installed in order to work.
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See the <a href="http://sourceforge.net/p/raspberry-gpio-python/wiki/install/" target="new">RPi.GPIO site</a> for details on how to do this.
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2014-07-25 11:07:23 +02:00
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2015-01-06 15:54:45 +01:00
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This is built into most recent Raspbian versions so no install should be necessary - but if necessary
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$ sudo apt-get update
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$ sudo apt-get install python-rpi.gpio python3-rpi.gpio
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2014-07-25 11:07:23 +02:00
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Usage
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-----
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Raspberry Pi-LITEr output node. The Pi-LITEr must be fitted.
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Operates in one of 5 different modes :
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- Byte Mode - expects a value between 0 and 255, and each of the LEDs represent 1 bit.
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- Meter Mode - expects a value between 0 and 8, the led lit corresponds to the input value - like a meter needle.
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- Bar Mode - expects a value between 0 and 8, similar to meter - but all the leds up to the value are turned on - like a mini bar chart.
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- All LEDs Mode - expects a 1 or 0 - turns on and off ALL the LEDs
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- Object Mode - expects a object specifying the LED and state eg. <code>{led:3,state:0}</code> to set LED3 off.
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2015-01-06 15:54:45 +01:00
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Requires the RPi.GPIO library installed in order to work.
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In order to access the GPIO the nrgpio.py command (installed as part of this package) must be run as root (sudo).
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The default Pi user can do this so it "should just work" - however if you are running Node-RED as not the Pi user then
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you may need to give your user sudo rights - or specifically sudo rights to python.
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