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Add sensehat simulator node

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node-red-node-pi-sense-hat-simulator
====================================
A <a href="http://nodered.org" target="_new">Node-RED</a> node to simulate a
Raspberry Pi Sense HAT.
This allows you to create flows that interact with a virtual Sense HAT without the actual
hardware - whether you're running on a Raspberry Pi, a laptop or elsewhere.
Once a Sense HAT simulator node has been deployed, the web page that provides
a UI to the simulator can be accessed by clicking the link in the node's info panel.
## Install
Run the following command in your Node-RED user directory (typically `~/.node-red`):
npm install node-red-node-pi-sense-hat-simulator
## Usage
### Input Node
This node sends readings from the various sensors on the Sense HAT, grouped into
three sets; motion events, environment events and joystick events.
#### Motion events
*** The current version of the simulator does not support Motion events ***
Motion events include readings from the accelerometer, gyroscope and magnetometer,
as well as the current compass heading. They are sent at a rate of approximately 10
per second. The `topic` is set to `motion` and the `payload` is an object with the
following values:
- `acceleration.x/y/z` : the acceleration intensity in Gs
- `gyroscope.x/y/z` : the rotational intensity in radians/s
- `orientation.roll/pitch/yaw` : the angle of the axis in degrees
- `compass` : the direction of North in degrees
#### Environment events
Environment events include readings from the temperature, humidity and pressure
sensors. They are sent at a rate of approximately 1 per second. The `topic`
is set to `environment` and the `payload` is an object
with the following values:
- `temperature` : degrees Celsius
- `humidity` : percentage of relative humidity
- `pressure` : Millibars
#### Joystick events
Joystick events are sent when the Sense HAT joystick is interacted with. The
`topic` is set to `joystick` and the `payload` is an object with the following values:
- `key` : one of `UP`, `DOWN`, `LEFT`, `RIGHT`, `ENTER`
- `state` : the state of the key:
- `0` : the key has been released
- `1` : the key has been pressed
- `2` : the key is being held down
### Output Node
This node sends commands to the 8x8 LED display on the Sense HAT.
Commands are sent to the node in `msg.payload`. Multiple commands can
be sent in a single message by separating them with newline (\n) characters.
#### Set the colour of individual pixels
Format: `<x>,<y>,<colour>`
`x` and `y` must either be a value from 0 to 7, a `*` to indicate the entire row
or column, or a range such as `3-6`.
`colour` must be one of:
- the well-known <a href="https://en.wikipedia.org/wiki/Web_colors" target="_new">HTML colour names</a> - eg `red` or `aquamarine`,
- the <a href="http://cheerlights.com/cheerlights-api/">CheerLights colour names</a>,
- a HEX colour value - eg `#aa9900`
- an RGB triple - `190,255,0`
- or simply `off`
To set the entire screen to red: `*,*,red`
To set the four corners of the display to red, green (#00ff00), yellow and blue (0,0,255):
`0,0,red,0,7,#00ff00,7,7,yellow,7,0,0,0,255`
To set a 3-pixel wide column to purple: `4-6,*,purple`
#### Rotate the screen
Format: `R<angle>`
`angle` must be 0, 90, 180 or 270.
#### Flip the screen
Format: `R<axis>`
`axis` must be either `H` or `V` to flip on the horizontal or vertical axis respectively.
#### Scroll a message
*** The current version of the simulator does not support displaying text ***
If `msg.payload` is not recognised as any of the above commands, it is treated
as a text message to be scrolled across the screen.
If the text is a single character, it will be displayed without scrolling. To
scroll a single character, append a blank space after it - `"A "`.</p>
The following message properties can be used to customise the appearance:
- `msg.color` - the colour of the text, default: `white`
- `msg.background` - the colour of the background, default: `off`
- `msg.speed` - the scroll speed. A value in the range 1 (slower) to 5 (faster), default: `3`
#### Set the screen brightness
Format: `D<level>`
`level` must be 0 (low) or 1 (high).

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/**
* Copyright 2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var colours = {
'aqua':'#00FFFF',
'aliceblue':'#F0F8FF',
'antiquewhite':'#FAEBD7',
'black':'#000000',
'off':'#000000',
'blue':'#0000FF',
'cyan':'#00FFFF',
'darkblue':'#00008B',
'darkcyan':'#008B8B',
'darkgreen':'#006400',
'darkturquoise':'#00CED1',
'deepskyblue':'#00BFFF',
'green':'#008000',
'lime':'#00FF00',
'mediumblue':'#0000CD',
'mediumspringgreen':'#00FA9A',
'navy':'#000080',
'springgreen':'#00FF7F',
'teal':'#008080',
'midnightblue':'#191970',
'dodgerblue':'#1E90FF',
'lightseagreen':'#20B2AA',
'forestgreen':'#228B22',
'seagreen':'#2E8B57',
'darkslategray':'#2F4F4F',
'darkslategrey':'#2F4F4F',
'limegreen':'#32CD32',
'mediumseagreen':'#3CB371',
'turquoise':'#40E0D0',
'royalblue':'#4169E1',
'steelblue':'#4682B4',
'darkslateblue':'#483D8B',
'mediumturquoise':'#48D1CC',
'indigo':'#4B0082',
'darkolivegreen':'#556B2F',
'cadetblue':'#5F9EA0',
'cornflowerblue':'#6495ED',
'mediumaquamarine':'#66CDAA',
'dimgray':'#696969',
'dimgrey':'#696969',
'slateblue':'#6A5ACD',
'olivedrab':'#6B8E23',
'slategray':'#708090',
'slategrey':'#708090',
'lightslategray':'#778899',
'lightslategrey':'#778899',
'mediumslateblue':'#7B68EE',
'lawngreen':'#7CFC00',
'aquamarine':'#7FFFD4',
'chartreuse':'#7FFF00',
'gray':'#808080',
'grey':'#808080',
'maroon':'#800000',
'olive':'#808000',
'purple':'#800080',
'lightskyblue':'#87CEFA',
'skyblue':'#87CEEB',
'blueviolet':'#8A2BE2',
'darkmagenta':'#8B008B',
'darkred':'#8B0000',
'saddlebrown':'#8B4513',
'darkseagreen':'#8FBC8F',
'lightgreen':'#90EE90',
'mediumpurple':'#9370DB',
'darkviolet':'#9400D3',
'palegreen':'#98FB98',
'darkorchid':'#9932CC',
'yellowgreen':'#9ACD32',
'sienna':'#A0522D',
'brown':'#A52A2A',
'darkgray':'#A9A9A9',
'darkgrey':'#A9A9A9',
'greenyellow':'#ADFF2F',
'lightblue':'#ADD8E6',
'paleturquoise':'#AFEEEE',
'lightsteelblue':'#B0C4DE',
'powderblue':'#B0E0E6',
'firebrick':'#B22222',
'darkgoldenrod':'#B8860B',
'mediumorchid':'#BA55D3',
'rosybrown':'#BC8F8F',
'darkkhaki':'#BDB76B',
'silver':'#C0C0C0',
'mediumvioletred':'#C71585',
'indianred':'#CD5C5C',
'peru':'#CD853F',
'chocolate':'#D2691E',
'tan':'#D2B48C',
'lightgray':'#D3D3D3',
'lightgrey':'#D3D3D3',
'thistle':'#D8BFD8',
'goldenrod':'#DAA520',
'orchid':'#DA70D6',
'palevioletred':'#DB7093',
'crimson':'#DC143C',
'gainsboro':'#DCDCDC',
'plum':'#DDA0DD',
'burlywood':'#DEB887',
'lightcyan':'#E0FFFF',
'lavender':'#E6E6FA',
'darksalmon':'#E9967A',
'palegoldenrod':'#EEE8AA',
'violet':'#EE82EE',
'azure':'#F0FFFF',
'honeydew':'#F0FFF0',
'khaki':'#F0E68C',
'lightcoral':'#F08080',
'sandybrown':'#F4A460',
'beige':'#F5F5DC',
'mintcream':'#F5FFFA',
'wheat':'#F5DEB3',
'whitesmoke':'#F5F5F5',
'ghostwhite':'#F8F8FF',
'lightgoldenrodyellow':'#FAFAD2',
'linen':'#FAF0E6',
'salmon':'#FA8072',
'oldlace':'#FDF5E6',
'warmwhite':'#FDF5E6',
'bisque':'#FFE4C4',
'blanchedalmond':'#FFEBCD',
'coral':'#FF7F50',
'cornsilk':'#FFF8DC',
'darkorange':'#FF8C00',
'deeppink':'#FF1493',
'floralwhite':'#FFFAF0',
'fuchsia':'#FF00FF',
'gold':'#FFD700',
'hotpink':'#FF69B4',
'ivory':'#FFFFF0',
'lavenderblush':'#FFF0F5',
'lemonchiffon':'#FFFACD',
'lightpink':'#FFB6C1',
'lightsalmon':'#FFA07A',
'lightyellow':'#FFFFE0',
'magenta':'#FF00FF',
'mistyrose':'#FFE4E1',
'moccasin':'#FFE4B5',
'navajowhite':'#FFDEAD',
'orange':'#FFA500',
'orangered':'#FF4500',
'papayawhip':'#FFEFD5',
'peachpuff':'#FFDAB9',
'pink':'#FFC0CB',
'red':'#FF0000',
'seashell':'#FFF5EE',
'snow':'#FFFAFA',
'tomato':'#FF6347',
'white':'#FFFFFF',
'yellow':'#FFFF00',
'amber':'#FFD200'
};
var hexColour = /^#([0-9A-F][0-9A-F][0-9A-F]){1,2}$/i;
module.exports.getRGB = function(col,rgb) {
if (!col) {
return null;
}
if (/^\d{1,3},\d{1,3},\d{1,3}$/.test(col)) {
return col;
}
col = col.toString().toLowerCase();
if (col in colours) {
col = colours[col];
}
if (hexColour.test(col)) {
if (col.length === 4) {
col = "#"+col[1]+col[1]+col[2]+col[2]+col[3]+col[3];
}
if (rgb === "grb") {
g = parseInt(col.slice(1,3),16);
r = parseInt(col.slice(3,5),16);
b = parseInt(col.slice(5),16);
}
else {
r = parseInt(col.slice(1,3),16);
g = parseInt(col.slice(3,5),16);
b = parseInt(col.slice(5),16);
}
return r+","+g+","+b;
}
else {
return null;
}
}
module.exports.getHex = function(col) {
col = col.toString().toLowerCase();
if (col in colours) {
return colours[col];
}
else { return null; }
}
module.exports.HexRGB = function(hex) {
try {
r = parseInt(hex.slice(1,3),16);
g = parseInt(hex.slice(3,5),16);
b = parseInt(hex.slice(5),16);
return r+","+g+","+b;
}
catch(e) { return null; }
}

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[{"id":"8b346a30.651a88","type":"rpi-sensehat out","z":"7756eff1.08d0a","name":"","x":530,"y":220,"wires":[]},{"id":"c2e7a15d.237bd","type":"function","z":"7756eff1.08d0a","name":"Simple graphical clock","func":"\n// array to hold \"random\" pixels\nvar ranNums = [];\n\n// create a non-overlapping array of random numbers 0-8\nfunction rerand() {\n var nums = [0,1,2,3,4,5,6,7,8];\n var i = nums.length;\n var j;\n ranNums = [];\n while (i--) {\n j = Math.floor(Math.random() * (i+1));\n ranNums.push(nums[j]);\n nums.splice(j,1);\n }\n}\n\n// Get the hours and minutes and split into tens and units\nvar d = new Date();\nvar s = d.getSeconds();\nvar su = s%4;\nif (su === 0) {\n var h = d.getHours();\n var m = d.getMinutes();\n var hu = h%10;\n h = parseInt(h/10);\n var mu = m%10;\n m = parseInt(m/10);\n \n // Do the tens of hours (red)\n rerand();\n node.send({payload:\"1-3,1-3,0,0,0\"});\n for (var i=0; i<h; i++) {\n node.send({payload:(1+ranNums[i]%3)+\",\"+(1+parseInt(ranNums[i]/3))+\",255,0,0\"});\n }\n \n // Do the units of hours (green)\n rerand();\n node.send({payload:\"4-6,1-3,0,0,0\"});\n for (var i=0; i<hu; i++) {\n node.send({payload:(4+ranNums[i]%3)+\",\"+(1+parseInt(ranNums[i]/3))+\",0,255,0\"});\n }\n \n // Do the tens of minutes (yellow)\n rerand();\n node.send({payload:\"1-3,4-6,0,0,0\"});\n for (var i=0; i<m; i++) {\n node.send({payload:(1+ranNums[i]%3)+\",\"+(4+parseInt(ranNums[i]/3))+\",255,255,0\"});\n }\n \n // Do the unit of minutes (blue)\n rerand();\n node.send({payload:\"4-6,4-6,0,0,0\"});\n for (var i=0; i<mu; i++) {\n node.send({payload:(4+ranNums[i]%3)+\",\"+(4+parseInt(ranNums[i]/3))+\",0,0,255\"});\n }\n \n}\nnode.send({payload:\"0,0,\"+(su===0?\"purple\":\"off\")+\",7,0,\"+(su===1?\"purple\":\"off\")+\",7,7,\"+(su===2?\"purple\":\"off\")+\",0,7,\"+(su===3?\"purple\":\"off\")})\n\n\n// nothing left to do\nreturn null;","outputs":1,"noerr":0,"x":320,"y":220,"wires":[["8b346a30.651a88"]]},{"id":"fc3808df.6cbcf8","type":"comment","z":"7756eff1.08d0a","name":"Simple graphical clock for Sense Hat","info":"Generates a graphical clock, showing hours and minutes. \n\nHours are shown by the red and green pixels, minutes\nare the yellow and blue pixels.\n\nUses the local time of the Pi - you may need to set your local\ntimezone using\n\n sudo dpkg-reconfigure tzdata\n","x":210,"y":180,"wires":[]},{"id":"f33ea1a7.27216","type":"inject","z":"7756eff1.08d0a","name":"","topic":"","payload":"","payloadType":"date","repeat":"1","crontab":"","once":true,"x":120,"y":220,"wires":[["c2e7a15d.237bd"]]}]

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[{"id":"104a54e7.6656cb","type":"rpi-sensehat out","z":"7756eff1.08d0a","name":"","x":470,"y":300,"wires":[]},{"id":"a3786fbb.b3ff9","type":"rpi-sensehat in","z":"7756eff1.08d0a","name":"","motion":true,"env":false,"stick":false,"x":120,"y":300,"wires":[["931798d.9640d68"]]},{"id":"931798d.9640d68","type":"function","z":"7756eff1.08d0a","name":"Compass","func":"// Based on the Compass example provided by\n// the Sense HAT python library\n// https://github.com/RPi-Distro/python-sense-hat/tree/master/examples\n\nvar led_loop = [4, 5, 6, 7, 15, 23, 31, 39, 47, 55, 63, 62, 61, 60, 59, 58, 57, 56, 48, 40, 32, 24, 16, 8, 0, 1, 2, 3];\nvar led_degree_ratio = led_loop.length / 360.0;\nvar dir = (360 - msg.payload.compass)%360;\n\nfunction getXY(dir) {\n var led_index = Math.floor(led_degree_ratio * (dir%360));\n var offset = led_loop[led_index];\n return [offset % 8,Math.floor(offset / 8)];\n}\n\nvar previous = context.get('previous');\nmsg.payload = '';\n\nvar position = getXY(dir);\nif (!previous || position[0] != previous[0][0] || position[1] != previous[0][1]) {\n if (previous) {\n msg.payload = previous[0][0]+\",\"+previous[0][1]+\",off,\"+\n previous[1][0]+\",\"+previous[1][1]+\",off,\";\n } else {\n msg.payload = \"*,*,off,\";\n }\n previous = [\n position,\n getXY(dir+180)\n ];\n msg.payload += previous[0][0]+\",\"+previous[0][1]+\",red,\"+\n previous[1][0]+\",\"+previous[1][1]+\",white\"\n \n context.set('previous',previous);\n return msg;\n}\nreturn null;\n\n","outputs":1,"noerr":0,"x":280,"y":300,"wires":[["104a54e7.6656cb"]]},{"id":"434680a8.c2e54","type":"comment","z":"7756eff1.08d0a","name":"Simple compass for Sense Hat","info":"Generates a compass, showing north (red) and south (white).\n\nBased on the python example provided with the Sense Hat: https://github.com/RPi-Distro/python-sense-hat/tree/master/examples\n\nThe accuracy of the compass will depend on callibrating the Sense Hat\ninternal compass. Search the Sense Hat forums for a guide on how to\ndo this.\n","x":190,"y":260,"wires":[]}]

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{
"name" : "node-red-node-pi-sense-hat-simulator",
"version" : "0.0.1",
"description" : "A Node-RED node to simulate a Raspberry Pi Sense HAT",
"repository" : {
"type":"git",
"url":"https://github.com/node-red/node-red-nodes/tree/master/hardware/sensehatsim"
},
"dependencies": {
"ws": "0.8.1"
},
"license": "Apache-2.0",
"keywords": [ "node-red", "sensehat", "astropi" ],
"node-red" : {
"nodes" : {
"sensehatsim": "sensehatsim.js"
}
},
"author": {
"name": "Nick O'Leary",
"email": "nick.oleary@gmail.com",
"url": "http://nodered.org"
}
}

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<html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<head>
<style>
html {
box-sizing: border-box;
}
*, *:before, *:after {
box-sizing: inherit;
}
body {
text-align: center;
background: #003300;
font-family: Arial;
}
#display {
display:inline-block;
border-radius: 5px;
width: auto;
margin: auto;
padding: 20px;
background: #00AA00;
margin-bottom: 20px;
box-shadow: 2px 2px 1px #99cc99;
}
.led {
background-color: #000;
border: 1px solid #eee;
display: inline-block;
width: 20px;
height: 20px;
border-radius: 3px;
margin: 1px;
box-shadow: 1px 1px 1px #666;
}
#controls {
}
#environment {
display: inline-block;
vertical-align: middle;
}
#joystick {
margin-left: 10px;
vertical-align: middle;
display: inline-block;
margin-top: 20px;
}
.envvar {
margin: 10px auto;
}
.envvar>span {
display: block;
color: silver;
margin-bottom: 2px;
}
.envvar>div {
border: 1px solid #999;
border-radius: 3px;
display:inline-block;
font-size: 18px;
background: #000;
box-shadow: 1px 1px 1px #eee;
}
a {
font-size: 38px;
line-height: 40px;
display: inline-block;
width: 40px;
height: 40px;
background: silver;
text-decoration: none;
vertical-align: top;
color: #333;
}
.envvar a {
margin: none;
}
.envvar a:first-of-type {
line-height: 35px;
}
a:active {
background: grey;
}
.envvar .value {
vertical-align: top;
height: 40px;
line-height: 40px;
color: silver;
display: inline-block;
width: 80px;
background: #000;
box-shadow: inset 1px 1px 2px #ddd;
}
#joystick a {
display: inline-block;
width: 43px;
height: 43px;
border: 1px solid #999;
margin: 3px;
line-height: 50px;
border-radius: 8px;
box-shadow: 1px 1px 1px #eee;
}
#joystick a.up {}
#joystick a.right {
box-shadow: 1px -1px 1px #eee;
transform: rotate(90deg);
}
#joystick a.down {
box-shadow: -1px -1px 1px #eee;
transform: rotate(180deg);
}
#joystick a.left {
box-shadow: -1px 1px 1px #eee;
transform: rotate(270deg);
}
#joystick a.enter {
}
</style>
</head>
<body>
<div id="display">
</div>
<div id="controls">
<div id="environment">
<div class="envvar">
<span>Temperature</span>
<div>
<a href="" onclick="changeTemperature(-0.2); return false;">-</a><div class="value" id="temperature"></div><a href="" onclick="changeTemperature(0.2); return false;">+</a>
</div>
</div>
<div class="envvar">
<span>Humidity</span>
<div>
<a href="" onclick="changeHumidity(-1); return false;">-</a><div class="value" id="humidity"></div><a href="" onclick="changeHumidity(1); return false;">+</a>
</div>
</div>
<div class="envvar">
<span>Pressure</span>
<div>
<a href="" onclick="changePressure(-5); return false;">-</a><div class="value" id="pressure"></div><a href="" onclick="changePressure(5); return false;">+</a>
</div>
</div>
</div>
<div id="joystick">
<div><a href="" id="j-up" class="up" onclick="return false;">^</a></div>
<div><a href="" id="j-left" class="left" onclick="return false;">^</a><a id="j-enter" href="" class="enter" onclick="return false;"></a><a id="j-right" href="" class="right" onclick="return false;">^</a></div>
<div><a href="" id="j-down" class="down" onclick="return false;">^</a></div>
</div>
</div>
<script>
var temperature = 29;
var humidity = 80;
var pressure = 1000;
var rotation = 0;
var flipH = false;
var flipV = false;
function updateTemperature(d) {
temperature = Number(d.toFixed(1));
document.getElementById('temperature').innerHTML = temperature.toFixed(1)+"&deg;C";
}
function changeTemperature(d) {
updateTemperature(temperature+d);
publishEnvironment();
}
function updateHumidity(d) {
humidity = d;
document.getElementById('humidity').innerHTML = humidity+"%";
}
function changeHumidity(d) {
updateHumidity(humidity+d);
publishEnvironment();
}
function updatePressure(d) {
pressure = d;
document.getElementById('pressure').innerHTML = pressure+"mb";
}
function changePressure(d) {
updatePressure(pressure+d);
publishEnvironment();
}
function publishEnvironment() {
if (ws && ws.readyState === ws.OPEN) {
ws.send("Y"+temperature+","+humidity+","+pressure);
}
}
var k = document.getElementById("j-up");
k.onmousedown = function() { keyDown('U'); }
k.onmouseup = function() { keyUp('U'); }
k = document.getElementById("j-down");
k.onmousedown = function() { keyDown('D'); }
k.onmouseup = function() { keyUp('D'); }
k = document.getElementById("j-left");
k.onmousedown = function() { keyDown('L'); }
k.onmouseup = function() { keyUp('L'); }
k = document.getElementById("j-right");
k.onmousedown = function() { keyDown('R'); }
k.onmouseup = function() { keyUp('R'); }
k = document.getElementById("j-enter");
k.onmousedown = function() { keyDown('E'); }
k.onmouseup = function() { keyUp('E'); }
var keyTimer = null;
function keyDown(evt) {
// K[U|L|R|D|E][0|1|2] - joystick event: direction,state
ws.send("K"+evt+"1");
keyTimer = setInterval(function() {
ws.send("K"+evt+"2");
},200);
}
function keyUp(evt) {
// K[U|L|R|D|E][0|1|2] - joystick event: direction,state
clearInterval(keyTimer);
ws.send("K"+evt+"0");
}
var display = document.getElementById("display");
var cells = [];
for (var y=0;y<8;y++) {
cells.push([]);
var r = document.createElement("div");
r.className = "row";
display.appendChild(r);
for (var x=0;x<8;x++) {
var d = document.createElement("div");
d.className = "led";
d.id = "led_"+x+"_"+y;
r.appendChild(d);
cells[y].push(d);
}
}
var ws;
function connect() {
var location = document.location.toString().replace(/^http/,"ws")+"/ws";
ws = new WebSocket(location);
ws.onopen = function() {
}
ws.onclose = function() {
setTimeout(connect,5000);
}
ws.onmessage = function(msg) {
var command = msg.data[0];
var data = msg.data.substring(1);
var parts;
var x,y,t;
if (command === 'P') {
parts = data.split(",");
for (var i=0;i<parts.length;i+=5) {
x = parts[i];
y = parts[i+1];
if (flipH) { x = 7-x; }
if (flipV) { y = 7-y; }
if (rotation === 180) {
x = 7-x;
y = 7-y;
} else if (rotation === 90) {
if (y<4 && x<4) { t = y; y = x; x = 7-t; }
else if (y<4 && x>3) { t=x; x = 7-y; y = t; }
else if (y>3 && x>3) { t=x; x = 7-y; y = t; }
else if (y>3 && x<4) { t=y; y = x; x = 7-t; }
} else if (rotation === 270) {
if (y<4 && x<4) { t = x; x = y; y = 7-t; }
else if (y<4 && x>3) { t=y; y = 7-x; x = t; }
else if (y>3 && x>3) { t=y; y = 7-x; x = t; }
else if (y>3 && x<4) { t=x; x = y; y = 7-t; }
}
cells[y][x].style.backgroundColor = "rgb("+parts[i+2]+","+parts[i+3]+","+parts[i+4]+")"
}
} else if (command === 'Y') {
parts = data.split(",");
updateTemperature(Number(parts[0]));
updateHumidity(Number(parts[1]));
updatePressure(Number(parts[2]));
} else if (command === 'R') {
var delta = Number(data) - rotation;
if (delta < 0) {
delta += 360;
}
if (delta === 90) {
for (y=0;y<4;y++) {
for (x=0;x<4;x++) {
t = cells[y][x].style.backgroundColor;
cells[y][x].style.backgroundColor = cells[7-y][x].style.backgroundColor;
cells[7-y][x].style.backgroundColor = cells[7-x][7-y].style.backgroundColor;
cells[7-x][7-y].style.backgroundColor = cells[y][7-x].style.backgroundColor;
cells[y][7-x].style.backgroundColor = t;
}
}
} else if (delta === 270) {
for (y=0;y<4;y++) {
for (x=0;x<4;x++) {
t = cells[y][x].style.backgroundColor;
cells[y][x].style.backgroundColor = cells[y][7-x].style.backgroundColor;
cells[y][7-x].style.backgroundColor = cells[7-x][7-y].style.backgroundColor;
cells[7-x][7-y].style.backgroundColor = cells[7-y][x].style.backgroundColor;
cells[7-y][x].style.backgroundColor = t;
}
}
} else if (delta === 180) {
for (y=0;y<4;y++) {
for (x=0;x<4;x++) {
t = cells[y][x].style.backgroundColor;
cells[y][x].style.backgroundColor = cells[7-y][7-x].style.backgroundColor;
cells[7-y][7-x].style.backgroundColor = t;
t = cells[7-y][x].style.backgroundColor;
cells[7-y][x].style.backgroundColor = cells[y][7-x].style.backgroundColor;
cells[y][7-x].style.backgroundColor = t;
}
}
}
rotation = Number(data);
//data = 0,90,180,270
} else if (command === 'F') {
if (data === 'H') {
flipH = !flipH;
for (y=0;y<8;y++) {
for (x=0;x<4;x++) {
t = cells[y][x].style.backgroundColor;
cells[y][x].style.backgroundColor = cells[y][7-x].style.backgroundColor;
cells[y][7-x].style.backgroundColor = t;
}
}
} else {
flipV = !flipV;
for (x=0;x<8;x++) {
for (y=0;y<4;y++) {
t = cells[y][x].style.backgroundColor;
cells[y][x].style.backgroundColor = cells[7-y][x].style.backgroundColor;
cells[7-y][x].style.backgroundColor = t;
}
}
}
}
}
}
connect();
</script>
</body>
</html>

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<!--
Copyright 2016 IBM Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script type="text/x-red" data-template-name="rpi-sensehatsim in">
<div class="form-row">
<label><i class="fa fa-arrow-right"></i> Outputs</label>
<label style="width: auto" for="node-input-motion"><input style="vertical-align: top; width: auto; margin-right: 5px;" type="checkbox" id="node-input-motion" disabled> Motion events</label>
<div style="padding-left: 125px; margin-top: -5px; color: #bbb;">accelerometer, gyroscope, magnetometer, compass</div>
</div>
<div class="form-row">
<label></label>
<label style="width: auto" for="node-input-env"><input style="vertical-align: top; width: auto; margin-right: 5px;" type="checkbox" id="node-input-env"> Environment events</label>
<div style="padding-left: 125px; margin-top: -5px; color: #bbb;">temperature, humidity, pressure</div>
</div>
<div class="form-row">
<label></label>
<label style="width: auto" for="node-input-stick"><input style="vertical-align: top; width: auto; margin-right: 5px;" type="checkbox" id="node-input-stick"> Joystick events</label>
</div>
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
<input type="text" id="node-input-name">
</div>
</script>
<script type="text/x-red" data-template-name="rpi-sensehatsim out">
<div class="form-row">
<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
<input type="text" id="node-input-name">
</div>
</script>
<script type="text/x-red" data-help-name="rpi-sensehatsim in">
<p>Raspberry Pi Sense HAT Simulator input node.</p>
<p>This node simulates readings from the various sensors on the Sense HAT,
grouped into three sets; motion events, environment events and joystick events.</p>
<p>Once deployed, the simulator can be accessed <a href="sensehat-simulator" target="_new">here</a>.</p>
<p><b>Motion events</b> - <i>not currently supported by the simulator</i></p>
<p>Motion events include readings from the accelerometer, gyroscope and magnetometer,
as well as the current compass heading. They are sent at a rate of approximately 10
per second. The <code>topic</code> is set to <code>motion</code> and the
<code>payload</code> is an object with the following values:</p>
<ul>
<li><code>acceleration.x/y/z</code> : the acceleration intensity in Gs</li>
<li><code>gyroscope.x/y/z</code> : the rotational intensity in radians/s</li>
<li><code>orientation.roll/pitch/yaw</code> : the angle of the axis in degrees</li>
<li><code>compass</code> : the direction of North in degrees</li>
</ul>
<p><b>Environment events</b></p>
<p>Environment events include readings from the temperature, humidity and pressure
sensors. They are sent at a rate of approximately 1 per second. The <code>topic</code>
is set to <code>environment</code> and the <code>payload</code> is an object
with the following values:</p>
<ul>
<li><code>temperature</code> : degrees Celsius</li>
<li><code>humidity</code> : percentage of relative humidity</li>
<li><code>pressure</code> : Millibars</li>
</ul>
<p><b>Joystick events</b></p>
<p>Joystick events are sent when the Sense HAT joystick is interacted with. The
<code>topic</code> is set to <code>joystick</code> and the <code>payload</code>
is an object with the following values:</p>
<ul>
<li><code>key</code> : one of <code>UP</code>, <code>DOWN</code>, <code>LEFT</code>, <code>RIGHT</code>, <code>ENTER</code></li>
<li><code>state</code> : the state of the key:
<ul>
<li><code>0</code> : the key has been released</li>
<li><code>1</code> : the key has been pressed</li>
<li><code>2</code> : the key is being held down</li>
</ul>
</li>
</ul>
</script>
<script type="text/x-red" data-help-name="rpi-sensehatsim out">
<p>Raspberry Pi Sense HAT Simulator output node.</p>
<p>This node sends commands to the 8x8 LED display on the Sense HAT simulator.</p>
<p>Once deployed, the simulator can be accessed <a href="sensehat-simulator" target="_new">here</a>.</p>
<p>Commands are sent to the node in <code>msg.payload</code>. Multiple commands can
be sent in a single message by separating them with newline (\n) characters.<p>
<p><b>Set the colour of individual pixels</b></p>
<p>Format: <code>&lt;x&gt;,&lt;y&gt;,&lt;colour&gt;</code>
<p><code>x</code> and <code>y</code> must either be a value from 0 to 7, a
<code>*</code> to indicate the entire row or column, or a range such as <code>3-6</code>.</p>
<p><code>colour</code> must be one of:
<ul>
<li>the well-known <a href="https://en.wikipedia.org/wiki/Web_colors" target="_new">HTML colour names</a>
- eg <code>red</code> or <code>aquamarine</code>,</li>
<li>the <a href="http://cheerlights.com/cheerlights-api/">CheerLights colour names</a>,</li>
<li>a HEX colour value - eg <code>#aa9900</code></li>
<li>an RGB triple - <code>190,255,0</code></li>
<li>or simply <code>off</code></li>
</ul>
<p><i>Examples</i></p>
<p>To set the entire screen to red:</p>
<p><code>*,*,red</code></p>
<p>To set the four corners of the display to red, green (#00ff00), yellow and blue (0,0,255):</p>
<p><code>0,0,red,0,7,#00ff00,7,7,yellow,7,0,0,0,255</code></p>
<p>To set a 3-pixel wide column to purple:</p>
<p><code>4-6,*,purple</code></p>
<p><b>Rotate the screen</b></p>
<p>Format: <code>R&lt;angle&gt;</code></p>
<p><code>angle</code> must be 0, 90, 180 or 270.</p>
<p><b>Flip the screen</b></p>
<p>Format: <code>R&lt;axis&gt;</code></p>
<p><code>axis</code> must be either <code>H</code> or <code>V</code> to flip on
the horizontal or vertical axis respectively.</p>
<p><b>Scroll a message</b> - <i>not currently supported by the simulator</i></p>
<p>If <code>msg.payload</code> is not recognised as any of the above commands,
it is treated as a text message to be scrolled across the screen.</p>
<p>If the text is a single character, it will be displayed without scrolling.
To scroll a single character, append a blank space after it - <code>"A "</code>.</p>
<p>The following message properties can be used to customise the appearance:</p>
<ul>
<li><code>msg.color</code> - the colour of the text, default: <code>white</code></li>
<li><code>msg.background</code> - the colour of the background, default: <code>off</code></li>
<li><code>msg.speed</code> - the scroll speed. A value in the range 1 (slower) to 5 (faster), default: <code>3</code></li>
</ul>
<p><b>Set the screen brightness</b> - <i>not currently supported by the simulator</i></p>
<p>Format: <code>D&lt;level&gt;</code></p>
<p><code>level</code> must be 0 (low) or 1 (high).</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('rpi-sensehatsim in',{
category: 'Raspberry Pi',
paletteLabel: "Sense HAT Sim",
color:"#c6dbef",
defaults: {
name: { value:"" },
motion: { value: false },
env: { value: true },
stick: { value: true }
},
inputs:0,
outputs:1,
icon: "rpi.png",
label: function() {
return this.name||"Sense HAT Sim";
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
RED.nodes.registerType('rpi-sensehatsim out',{
category: 'Raspberry Pi',
paletteLabel: "Sense HAT Sim",
color:"#c6dbef",
defaults: {
name: { value:"" },
},
inputs:1,
outputs:0,
icon: "rpi.png",
align: "right",
label: function() {
return this.name||"Sense HAT Sim";
},
labelStyle: function() {
return this.name?"node_label_italic":"";
}
});
</script>

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/**
* Copyright 2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var path = require("path");
var ws = require("ws");
var colours = require('./colours');
// Xaccel.x,y,z,gyro.x,y,z,orientation.roll,pitch,yaw,compass
var HF_RE = /^X(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+)$/;
// Ytemperature,humidity,pressure
var LF_RE = /^Y(.+),(.+),(.+)$/;
// K[U|L|R|D|E][0|1|2] - joystick event: direction,state
var KEY_RE = /^K(.)(.)$/;
var KEY_MAP = {
"U":"UP",
"D":"DOWN",
"L":"LEFT",
"R":"RIGHT",
"E":"ENTER"
};
var currentFlipH = false;
var currentFlipV = false;
var currentRotation = "R0";
var currentDisplay = [];
var HAT = (function() {
var hatWS = null;
var wsServerListeners = {};
var wsConnections = {};
var currentEnvironment = {temperature: 20, humidity: 80, pressure: 1000};
var hat = null;
var onclose = null;
var users = [];
var motionUsers = 0;
var envUsers = 0;
var reconnectTimer = null;
var envTimer = null;
var connect = function() {
if (!hatWS) {
currentFlipH = false;
currentFlipV = false;
currentRotation = "R0";
currentDisplay = [];
for (var y=0;y<8;y++) {
currentDisplay.push([]);
for (var x=0;x<8;x++) {
currentDisplay[y].push('0,0,0');
}
}
var wsPath = RED.settings.httpNodeRoot || "/";
wsPath = wsPath + (wsPath.slice(-1) == "/" ? "":"/") + "sensehat-simulator/ws"
var storeListener = function(event,listener){
if(event == "error" || event == "upgrade" || event == "listening"){
wsServerListeners[event] = listener;
}
}
RED.server.addListener('newListener',storeListener);
// Create a WebSocket Server
hatWS = new ws.Server({
server:RED.server,
path:wsPath,
// Disable the deflate option due to this issue
// https://github.com/websockets/ws/pull/632
// that is fixed in the 1.x release of the ws module
// that we cannot currently pickup as it drops node 0.10 support
perMessageDeflate: false
});
RED.server.removeListener('newListener',storeListener);
hatWS.on('connection', function(socket) {
var id = (1+Math.random()*4294967295).toString(16);
wsConnections[id] = socket;
socket.send("Y"+currentEnvironment.temperature+","+currentEnvironment.humidity+","+currentEnvironment.pressure);
socket.send(currentRotation);
if (currentFlipV) {
socket.send("FV");
}
if (currentFlipH) {
socket.send("FH");
}
var cmd = "";
for (var y=0;y<8;y++) {
for (var x=0;x<8;x++) {
cmd += ","+x+","+y+","+currentDisplay[y][x];
}
}
socket.send("P"+cmd.substring(1));
socket.on('close',function() {
delete wsConnections[id];
});
socket.on('message',function(data,flags){
var m;
var msg;
if ((m = LF_RE.exec(data)) !== null) {
currentEnvironment = {temperature: Number(m[1]), humidity: Number(m[2]), pressure: Number(m[3])};
msg = "Y"+currentEnvironment.temperature+","+currentEnvironment.humidity+","+currentEnvironment.pressure;
for (var id in wsConnections) {
if (wsConnections.hasOwnProperty(id)) {
var client = wsConnections[id];
if (client !== socket) {
client.send(msg);
}
}
}
} else if ((m = KEY_RE.exec(data)) !== null) {
msg = {
topic: "joystick",
payload: {key: KEY_MAP[m[1]], state: Number(m[2])}
}
for (var j=0;j<users.length;j++) {
var node = users[j];
if (node.stick) {
node.send(RED.util.cloneMessage(msg));
}
}
}
});
socket.on('error', function(err) {
delete wsConnections[id];
});
});
}
}
var disconnect = function(done) {
if (hatWS !== null) {
var listener = null;
for (var event in wsServerListeners) {
if (wsServerListeners.hasOwnProperty(event)) {
listener = wsServerListeners[event];
if (typeof listener === "function") {
RED.server.removeListener(event,listener);
}
}
}
wsServerListeners = {};
wsConnections = {};
hatWS.close();
hatWS = null;
}
done();
}
return {
open: function(node) {
if (!hatWS) {
connect();
}
if (!reconnectTimer) {
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
}
if (node.motion) {
motionUsers++;
}
if (node.env) {
envUsers++;
}
users.push(node);
if (envUsers === 1) {
envTimer = setInterval(function() {
var msg = {
topic: "environment",
payload: {temperature: currentEnvironment.temperature, humidity: currentEnvironment.humidity, pressure: currentEnvironment.pressure}
};
for (var j=0;j<users.length;j++) {
var node = users[j];
if (node.env) {
node.send(RED.util.cloneMessage(msg));
}
}
},1000);
}
},
close: function(node,done) {
if (node.motion) {
motionUsers--;
}
if (node.env) {
envUsers--;
}
if (envUsers === 0) {
clearTimeout(envTimer);
}
users.splice(users.indexOf(node),1);
if (users.length === 0) {
disconnect(done);
} else {
done();
}
},
send: function(msg) {
for (var id in wsConnections) {
if (wsConnections.hasOwnProperty(id)) {
var client = wsConnections[id];
client.send(msg);
}
}
}
}
})();
function SenseHatInNode(n) {
RED.nodes.createNode(this,n);
this.motion = n.motion;
this.env = n.env;
this.stick = n.stick;
var node = this;
node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
HAT.open(this);
node.on("close", function(done) {
HAT.close(this,done);
});
}
RED.nodes.registerType("rpi-sensehatsim in",SenseHatInNode);
function SenseHatOutNode(n) {
RED.nodes.createNode(this,n);
var node = this;
node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
HAT.open(this);
node.on("close", function(done) {
HAT.close(this,done);
});
var handleTextMessage = function(line,msg) {
var textCol = colours.getRGB(msg.color||msg.colour)||"255,255,255";
var backCol = colours.getRGB(msg.background)||"0,0,0";
var speed = null;
if (!isNaN(msg.speed)) {
speed = msg.speed;
}
var command = "T";
if (textCol) {
command += textCol;
if (backCol) {
command += ","+backCol;
}
}
if (speed) {
var s = parseInt(speed);
if (s >= 1 && s <= 5) {
s = 0.1 + (3-s)*0.03;
}
command = command + ((command.length === 1)?"":",") + s;
}
command += ":" + line;
return command;
}
node.on("input",function(msg) {
var command;
var parts;
var col;
if (typeof msg.payload === 'number') {
HAT.send(handleTextMessage(""+msg.payload,msg));
} else if (typeof msg.payload === 'string') {
var lines = msg.payload.split("\n");
lines.forEach(function(line) {
command = null;
if ( /^(([0-7]|\*|[0-7]-[0-7]),([0-7]|\*|[0-7]-[0-7]),(\d{1,3},\d{1,3},\d{1,3}|#[a-f0-9]{3,6}|[a-z]+))(,([0-7]|\*|[0-7]-[0-7]),([0-7]|\*|[0-7]-[0-7]),(\d{1,3},\d{1,3},\d{1,3}|#[a-f0-9]{3,6}|[a-z]+))*$/i.test(line)) {
parts = line.split(",");
var expanded = [];
var i=0;
var j=0;
while (i<parts.length) {
var x = parts[i++];
var y = parts[i++];
col = parts[i++];
if (/#[a-f0-9]{3,6}|[a-z]/i.test(col)) {
col = colours.getRGB(col);
if (col === null) {
// invalid colour, go no further
return;
}
} else {
col += ","+parts[i++]+","+parts[i++];
}
if (x === '*') {
x = "0-7";
}
if (y === '*') {
y = "0-7";
}
var x0,x1;
var y0,y1;
if (x.indexOf("-") === -1) {
x0 = x1 = parseInt(x);
} else {
var px = x.split("-");
x0 = parseInt(px[0]);
x1 = parseInt(px[1]);
if (x1<x0) {
j = x1;
x1 = x0;
x0 = j;
}
}
if (y.indexOf("-") === -1) {
y0 = y1 = parseInt(y);
} else {
var py = y.split("-");
y0 = parseInt(py[0]);
y1 = parseInt(py[1]);
if (y1<y0) {
j = y1;
y1 = y0;
y0 = j;
}
}
x = x0;
while(x<=x1) {
y = y0;
while(y<=y1) {
expanded.push([x,y,col]);
y++;
}
x++;
}
}
if (expanded.length > 0) {
var pixels = {};
var rules = [];
for (i=expanded.length-1;i>=0;i--) {
var rule = expanded[i];
if (!pixels[rule[0]+","+rule[1]]) {
rules.unshift(rule.join(","));
currentDisplay[Number(rule[1])][Number(rule[0])] = rule[2];
pixels[rule[0]+","+rule[1]] = true;
}
}
if (rules.length > 0) {
command = "P"+rules.join(",");
}
}
}
if (!command) {
if (/^R(0|90|180|270)$/i.test(line)) {
command = line.toUpperCase();
currentRotation = command;
} else if (/^F(H|V)$/i.test(line)) {
command = line.toUpperCase();
if (command === 'FH') {
currentFlipH = !currentFlipH;
} else {
currentFlipV = !currentFlipV;
}
} else if (/^D(0|1)$/i.test(line)) {
command = line.toUpperCase();
} else {
command = handleTextMessage(line,msg);
}
}
if (command) {
//console.log(command);
HAT.send(command);
}
});
}
});
}
RED.nodes.registerType("rpi-sensehatsim out",SenseHatOutNode);
RED.httpAdmin.get("/sensehat-simulator",function(req,res) {
res.sendFile(path.join(__dirname,"public","index.html"));
});
}