diff --git a/docs/api_boards.rst b/docs/api_boards.rst
index cec9e7e..49919fb 100644
--- a/docs/api_boards.rst
+++ b/docs/api_boards.rst
@@ -127,6 +127,20 @@ Energenie
     :inherited-members:
     :members:
 
+StatusZero
+==========
+
+.. autoclass:: StatusZero
+    :inherited-members:
+    :members:
+
+StatusBoard
+===========
+
+.. autoclass:: StatusBoard
+    :inherited-members:
+    :members:
+
 SnowPi
 ======
 
@@ -168,4 +182,3 @@ CompositeDevice
 
 .. autoclass:: CompositeDevice(\*args, _order=None, \*\*kwargs)
     :members:
-
diff --git a/docs/images/device_hierarchy.dot b/docs/images/device_hierarchy.dot
index a794678..c3b6717 100644
--- a/docs/images/device_hierarchy.dot
+++ b/docs/images/device_hierarchy.dot
@@ -90,11 +90,13 @@ digraph classes {
     ButtonBoard->HoldMixin;
     PiLiter->LEDBoard;
     PiLiterBarGraph->LEDBarGraph;
+    StatusZero->LEDBoard;
     TrafficLights->LEDBoard;
     SnowPi->LEDBoard;
     PiTraffic->TrafficLights;
     PiStop->TrafficLights;
     TrafficLightsBuzzer->CompositeOutputDevice;
+    StatusBoard->CompositeOutputDevice;
     FishDish->TrafficLightsBuzzer;
     TrafficHat->TrafficLightsBuzzer;
     Robot->CompositeDevice;
@@ -115,4 +117,3 @@ digraph classes {
     PingServer->InternalDevice;
     CPUTemperature->InternalDevice;
 }
-
diff --git a/docs/images/device_hierarchy.pdf b/docs/images/device_hierarchy.pdf
index 5aecea9..c61e943 100644
Binary files a/docs/images/device_hierarchy.pdf and b/docs/images/device_hierarchy.pdf differ
diff --git a/docs/images/device_hierarchy.png b/docs/images/device_hierarchy.png
index 42e1073..28e47f3 100644
Binary files a/docs/images/device_hierarchy.png and b/docs/images/device_hierarchy.png differ
diff --git a/docs/images/device_hierarchy.svg b/docs/images/device_hierarchy.svg
index d5d5b09..35097c4 100644
--- a/docs/images/device_hierarchy.svg
+++ b/docs/images/device_hierarchy.svg
@@ -4,235 +4,235 @@
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 </g>
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 <g id="edge1" class="edge"><title>GPIODevice&#45;&gt;Device</title>
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 <g id="node8" class="node"><title>SmoothedInputDevice</title>
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-<polygon fill="black" stroke="black" points="437.945,-665.05 427.796,-662.006 433.831,-670.714 437.945,-665.05"/>
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 <g id="node16" class="node"><title>InputDevice</title>
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 <g id="node9" class="node"><title>AnalogInputDevice</title>
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+<text text-anchor="middle" x="402" y="-983.5" font-family="Sans" font-size="10.00" fill="#000000">AnalogInputDevice</text>
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+<text text-anchor="middle" x="248.5" y="-857.5" font-family="Sans" font-size="10.00" fill="#ffffff">SPIDevice</text>
 </g>
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 <g id="edge24" class="edge"><title>AnalogInputDevice&#45;&gt;SPIDevice</title>
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-<polygon fill="black" stroke="black" points="283.475,-779.395 273.393,-776.137 279.242,-784.971 283.475,-779.395"/>
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+<polygon fill="black" stroke="black" points="281.092,-881.723 271.166,-878.019 276.616,-887.105 281.092,-881.723"/>
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-<polygon fill="black" stroke="black" points="289.858,-481.158 279.483,-479.01 286.253,-487.159 289.858,-481.158"/>
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 <g id="node17" class="node"><title>DigitalInputDevice</title>
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-<text text-anchor="middle" x="566.5" y="-566.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalInputDevice</text>
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+<text text-anchor="middle" x="566.5" y="-593.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalInputDevice</text>
 </g>
 <!-- DigitalInputDevice&#45;&gt;EventsMixin -->
 <g id="edge5" class="edge"><title>DigitalInputDevice&#45;&gt;EventsMixin</title>
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-<polygon fill="black" stroke="black" points="446.262,-620.178 438.649,-627.547 449.195,-626.534 446.262,-620.178"/>
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+<polygon fill="black" stroke="black" points="446.931,-631.713 438.545,-638.188 449.139,-638.356 446.931,-631.713"/>
 </g>
 <!-- DigitalInputDevice&#45;&gt;InputDevice -->
 <g id="edge4" class="edge"><title>DigitalInputDevice&#45;&gt;InputDevice</title>
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-<polygon fill="black" stroke="black" points="448.855,-553.278 438.545,-555.719 448.127,-560.24 448.855,-553.278"/>
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+<polygon fill="black" stroke="black" points="448.545,-592.5 438.545,-596 448.545,-599.5 448.545,-592.5"/>
 </g>
 <!-- Button -->
 <g id="node18" class="node"><title>Button</title>
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-<text text-anchor="middle" x="713" y="-516.5" font-family="Sans" font-size="10.00" fill="#ffffff">Button</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="740,-555 686,-555 686,-519 740,-519 740,-555"/>
+<text text-anchor="middle" x="713" y="-534.5" font-family="Sans" font-size="10.00" fill="#ffffff">Button</text>
 </g>
 <!-- Button&#45;&gt;HoldMixin -->
 <g id="edge9" class="edge"><title>Button&#45;&gt;HoldMixin</title>
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-<polygon fill="black" stroke="black" points="607.816,-512.615 597.722,-515.837 607.622,-519.612 607.816,-512.615"/>
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+<polygon fill="black" stroke="black" points="608.099,-444.71 597.542,-443.817 605.238,-451.098 608.099,-444.71"/>
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 <!-- Button&#45;&gt;DigitalInputDevice -->
 <g id="edge8" class="edge"><title>Button&#45;&gt;DigitalInputDevice</title>
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-<polygon fill="black" stroke="black" points="626.338,-544.937 618.033,-551.515 628.628,-551.552 626.338,-544.937"/>
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+<polygon fill="black" stroke="black" points="619.558,-570.964 611.623,-577.984 622.204,-577.445 619.558,-570.964"/>
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 <!-- MotionSensor -->
 <g id="node19" class="node"><title>MotionSensor</title>
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-<text text-anchor="middle" x="713" y="-894.5" font-family="Sans" font-size="10.00" fill="#ffffff">MotionSensor</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="754.5,-771 671.5,-771 671.5,-735 754.5,-735 754.5,-771"/>
+<text text-anchor="middle" x="713" y="-750.5" font-family="Sans" font-size="10.00" fill="#ffffff">MotionSensor</text>
 </g>
 <!-- MotionSensor&#45;&gt;SmoothedInputDevice -->
 <g id="edge10" class="edge"><title>MotionSensor&#45;&gt;SmoothedInputDevice</title>
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+<polygon fill="black" stroke="black" points="598.546,-671.916 588.625,-668.196 594.06,-677.291 598.546,-671.916"/>
 </g>
 <!-- LightSensor -->
 <g id="node20" class="node"><title>LightSensor</title>
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-<text text-anchor="middle" x="713" y="-840.5" font-family="Sans" font-size="10.00" fill="#ffffff">LightSensor</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="750,-717 676,-717 676,-681 750,-681 750,-717"/>
+<text text-anchor="middle" x="713" y="-696.5" font-family="Sans" font-size="10.00" fill="#ffffff">LightSensor</text>
 </g>
 <!-- LightSensor&#45;&gt;SmoothedInputDevice -->
 <g id="edge11" class="edge"><title>LightSensor&#45;&gt;SmoothedInputDevice</title>
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-<polygon fill="black" stroke="black" points="610.255,-781.954 599.82,-780.117 606.832,-788.06 610.255,-781.954"/>
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+<polygon fill="black" stroke="black" points="631.176,-667.897 620.582,-668 628.928,-674.526 631.176,-667.897"/>
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 <!-- LineSensor -->
 <g id="node21" class="node"><title>LineSensor</title>
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-<text text-anchor="middle" x="713" y="-786.5" font-family="Sans" font-size="10.00" fill="#ffffff">LineSensor</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="748,-663 678,-663 678,-627 748,-627 748,-663"/>
+<text text-anchor="middle" x="713" y="-642.5" font-family="Sans" font-size="10.00" fill="#ffffff">LineSensor</text>
 </g>
 <!-- LineSensor&#45;&gt;SmoothedInputDevice -->
 <g id="edge12" class="edge"><title>LineSensor&#45;&gt;SmoothedInputDevice</title>
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-<polygon fill="black" stroke="black" points="638.551,-771.715 628.078,-773.319 637.265,-778.596 638.551,-771.715"/>
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+<polygon fill="black" stroke="black" points="637.951,-644.06 628.078,-647.904 638.193,-651.056 637.951,-644.06"/>
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 <!-- DistanceSensor -->
 <g id="node22" class="node"><title>DistanceSensor</title>
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-<text text-anchor="middle" x="713" y="-732.5" font-family="Sans" font-size="10.00" fill="#ffffff">DistanceSensor</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="759,-609 667,-609 667,-573 759,-573 759,-609"/>
+<text text-anchor="middle" x="713" y="-588.5" font-family="Sans" font-size="10.00" fill="#ffffff">DistanceSensor</text>
 </g>
 <!-- DistanceSensor&#45;&gt;SmoothedInputDevice -->
 <g id="edge13" class="edge"><title>DistanceSensor&#45;&gt;SmoothedInputDevice</title>
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-<polygon fill="black" stroke="black" points="637.219,-745.412 628.032,-750.69 638.505,-752.293 637.219,-745.412"/>
+<path fill="none" stroke="black" d="M667.86,-609.023C653.151,-615.028 636.601,-621.786 621.246,-628.055"/>
+<polygon fill="black" stroke="black" points="619.803,-624.864 611.868,-631.885 622.449,-631.345 619.803,-624.864"/>
 </g>
 <!-- OutputDevice -->
 <g id="node23" class="node"><title>OutputDevice</title>
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 </g>
 <!-- OutputDevice&#45;&gt;SourceMixin -->
 <g id="edge15" class="edge"><title>OutputDevice&#45;&gt;SourceMixin</title>
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 <!-- OutputDevice&#45;&gt;GPIODevice -->
 <g id="edge14" class="edge"><title>OutputDevice&#45;&gt;GPIODevice</title>
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-<polygon fill="black" stroke="black" points="294.726,-457.5 284.726,-461 294.726,-464.5 294.726,-457.5"/>
+<path fill="none" stroke="black" d="M360.799,-466.572C340.458,-469.392 315.696,-472.824 294.696,-475.735"/>
+<polygon fill="black" stroke="black" points="294.151,-472.277 284.726,-477.117 295.112,-479.211 294.151,-472.277"/>
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 <!-- DigitalOutputDevice -->
 <g id="node24" class="node"><title>DigitalOutputDevice</title>
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-<text text-anchor="middle" x="566.5" y="-366.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalOutputDevice</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="622.5,-506 510.5,-506 510.5,-470 622.5,-470 622.5,-506"/>
+<text text-anchor="middle" x="566.5" y="-485.5" font-family="Sans" font-size="10.00" fill="#ffffff">DigitalOutputDevice</text>
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 <!-- DigitalOutputDevice&#45;&gt;OutputDevice -->
 <g id="edge16" class="edge"><title>DigitalOutputDevice&#45;&gt;OutputDevice</title>
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-<polygon fill="black" stroke="black" points="442.016,-434.889 435.038,-442.862 445.465,-440.98 442.016,-434.889"/>
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+<polygon fill="black" stroke="black" points="453.503,-465.843 443.064,-467.657 452.355,-472.749 453.503,-465.843"/>
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 <!-- LED -->
 <g id="node25" class="node"><title>LED</title>
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-<text text-anchor="middle" x="713" y="-300.5" font-family="Sans" font-size="10.00" fill="#ffffff">LED</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="740,-501 686,-501 686,-465 740,-465 740,-501"/>
+<text text-anchor="middle" x="713" y="-480.5" font-family="Sans" font-size="10.00" fill="#ffffff">LED</text>
 </g>
 <!-- LED&#45;&gt;DigitalOutputDevice -->
 <g id="edge17" class="edge"><title>LED&#45;&gt;DigitalOutputDevice</title>
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+<polygon fill="black" stroke="black" points="632.378,-482.253 622.505,-486.097 632.62,-489.249 632.378,-482.253"/>
 </g>
 <!-- Buzzer -->
 <g id="node26" class="node"><title>Buzzer</title>
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-<text text-anchor="middle" x="713" y="-354.5" font-family="Sans" font-size="10.00" fill="#ffffff">Buzzer</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="740,-447 686,-447 686,-411 740,-411 740,-447"/>
+<text text-anchor="middle" x="713" y="-426.5" font-family="Sans" font-size="10.00" fill="#ffffff">Buzzer</text>
 </g>
 <!-- Buzzer&#45;&gt;DigitalOutputDevice -->
 <g id="edge18" class="edge"><title>Buzzer&#45;&gt;DigitalOutputDevice</title>
-<path fill="none" stroke="black" d="M685.832,-359.173C670.872,-360.415 651.388,-362.033 632.562,-363.597"/>
-<polygon fill="black" stroke="black" points="632.181,-360.116 622.505,-364.432 632.761,-367.092 632.181,-360.116"/>
+<path fill="none" stroke="black" d="M685.832,-439.684C667.757,-447.065 643.077,-457.142 620.932,-466.184"/>
+<polygon fill="black" stroke="black" points="619.558,-462.964 611.623,-469.984 622.204,-469.445 619.558,-462.964"/>
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 <!-- PWMOutputDevice -->
 <g id="node27" class="node"><title>PWMOutputDevice</title>
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-<text text-anchor="middle" x="566.5" y="-458.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMOutputDevice</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="618.5,-398 514.5,-398 514.5,-362 618.5,-362 618.5,-398"/>
+<text text-anchor="middle" x="566.5" y="-377.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMOutputDevice</text>
 </g>
 <!-- PWMOutputDevice&#45;&gt;OutputDevice -->
 <g id="edge19" class="edge"><title>PWMOutputDevice&#45;&gt;OutputDevice</title>
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-<polygon fill="black" stroke="black" points="453.012,-457.5 443.012,-461 453.012,-464.5 453.012,-457.5"/>
+<path fill="none" stroke="black" d="M523.997,-398.079C517.603,-400.992 511.101,-404.028 505,-407 484.968,-416.759 463.091,-428.23 444.752,-438.084"/>
+<polygon fill="black" stroke="black" points="442.924,-435.093 435.787,-442.923 446.249,-441.253 442.924,-435.093"/>
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 <!-- PWMLED -->
 <g id="node28" class="node"><title>PWMLED</title>
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-<text text-anchor="middle" x="713" y="-462.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMLED</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="742,-393 684,-393 684,-357 742,-357 742,-393"/>
+<text text-anchor="middle" x="713" y="-372.5" font-family="Sans" font-size="10.00" fill="#ffffff">PWMLED</text>
 </g>
 <!-- PWMLED&#45;&gt;PWMOutputDevice -->
 <g id="edge20" class="edge"><title>PWMLED&#45;&gt;PWMOutputDevice</title>
-<path fill="none" stroke="black" d="M683.796,-464.219C668.131,-463.786 648,-463.228 628.903,-462.7"/>
-<polygon fill="black" stroke="black" points="628.832,-459.197 618.738,-462.418 628.638,-466.194 628.832,-459.197"/>
+<path fill="none" stroke="black" d="M683.796,-375.976C668.131,-376.518 648,-377.215 628.903,-377.875"/>
+<polygon fill="black" stroke="black" points="628.611,-374.383 618.738,-378.227 628.854,-381.379 628.611,-374.383"/>
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 <!-- RGBLED -->
 <g id="node29" class="node"><title>RGBLED</title>
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-<text text-anchor="middle" x="402" y="-42.5" font-family="Sans" font-size="10.00" fill="#ffffff">RGBLED</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="430,-546 374,-546 374,-510 430,-510 430,-546"/>
+<text text-anchor="middle" x="402" y="-525.5" font-family="Sans" font-size="10.00" fill="#ffffff">RGBLED</text>
 </g>
 <!-- RGBLED&#45;&gt;SourceMixin -->
 <g id="edge22" class="edge"><title>RGBLED&#45;&gt;SourceMixin</title>
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+<path fill="none" stroke="black" d="M373.699,-515.591C360.844,-508.778 345.965,-499.39 335,-488 298.866,-450.465 272.958,-394.68 259.67,-361.563"/>
+<polygon fill="black" stroke="black" points="262.855,-360.097 255.953,-352.058 256.335,-362.646 262.855,-360.097"/>
 </g>
 <!-- RGBLED&#45;&gt;Device -->
 <g id="edge21" class="edge"><title>RGBLED&#45;&gt;Device</title>
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+<polygon fill="black" stroke="black" points="172.301,-504.638 162.036,-507.26 171.696,-511.611 172.301,-504.638"/>
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 <!-- SPIDevice&#45;&gt;Device -->
 <g id="edge23" class="edge"><title>SPIDevice&#45;&gt;Device</title>
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 <!-- MCP30xx -->
 <g id="node31" class="node"><title>MCP30xx</title>
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-<text text-anchor="middle" x="713" y="-1096.5" font-family="Sans" font-size="10.00" fill="#ffffff">MCP30xx</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="743,-1135 683,-1135 683,-1099 743,-1099 743,-1135"/>
+<text text-anchor="middle" x="713" y="-1114.5" font-family="Sans" font-size="10.00" fill="#ffffff">MCP30xx</text>
 </g>
 <!-- MCP30xx&#45;&gt;MCP3xxx -->
 <g id="edge26" class="edge"><title>MCP30xx&#45;&gt;MCP3xxx</title>
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-<polygon fill="black" stroke="black" points="606.75,-1046.34 596.205,-1045.31 603.805,-1052.69 606.75,-1046.34"/>
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+<polygon fill="black" stroke="black" points="606.75,-1064.34 596.205,-1063.31 603.805,-1070.69 606.75,-1064.34"/>
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 <!-- MCP32xx -->
 <g id="node32" class="node"><title>MCP32xx</title>
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-<text text-anchor="middle" x="713" y="-948.5" font-family="Sans" font-size="10.00" fill="#ffffff">MCP32xx</text>
+<polygon fill="#2980b9" stroke="#2980b9" points="743,-987 683,-987 683,-951 743,-951 743,-987"/>
+<text text-anchor="middle" x="713" y="-966.5" font-family="Sans" font-size="10.00" fill="#ffffff">MCP32xx</text>
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 <!-- MCP32xx&#45;&gt;MCP3xxx -->
 <g id="edge27" class="edge"><title>MCP32xx&#45;&gt;MCP3xxx</title>
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 <!-- MCP3xx2&#45;&gt;MCP3xxx -->
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+<text text-anchor="middle" x="713" y="-309.5" font-family="Sans" font-size="10.00" fill="#ffffff">ButtonBoard</text>
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 <!-- ButtonBoard&#45;&gt;HoldMixin -->
 <g id="edge51" class="edge"><title>ButtonBoard&#45;&gt;HoldMixin</title>
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 <!-- ButtonBoard&#45;&gt;CompositeDevice -->
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 <!-- PiLiter -->
 <g id="node49" class="node"><title>PiLiter</title>
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 <!-- PiLiter&#45;&gt;LEDBoard -->
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+<polygon fill="black" stroke="black" points="761.824,-158.09 753.718,-164.913 764.31,-164.634 761.824,-158.09"/>
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+<text text-anchor="middle" x="844" y="-236.5" font-family="Sans" font-size="10.00" fill="#ffffff">StatusZero</text>
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+<!-- StatusZero&#45;&gt;LEDBoard -->
+<g id="edge54" class="edge"><title>StatusZero&#45;&gt;LEDBoard</title>
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+<text text-anchor="middle" x="844" y="-182.5" font-family="Sans" font-size="10.00" fill="#ffffff">TrafficLights</text>
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+<g id="edge55" class="edge"><title>TrafficLights&#45;&gt;LEDBoard</title>
+<path fill="none" stroke="black" d="M807.75,-199.756C791.412,-206.595 771.897,-214.764 754.912,-221.874"/>
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+<path fill="none" stroke="black" d="M936.423,-163.992C922.89,-167.102 905.966,-170.991 890.371,-174.574"/>
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+<!-- StatusBoard -->
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+<text text-anchor="middle" x="566.5" y="-231.5" font-family="Sans" font-size="10.00" fill="#ffffff">StatusBoard</text>
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+<!-- StatusBoard&#45;&gt;CompositeOutputDevice -->
+<g id="edge60" class="edge"><title>StatusBoard&#45;&gt;CompositeOutputDevice</title>
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