diff --git a/rack/controller/controller.ino b/rack/controller/controller.ino
new file mode 100644
index 0000000..f977bf6
--- /dev/null
+++ b/rack/controller/controller.ino
@@ -0,0 +1,52 @@
+#include <Adafruit_NeoPixel.h>
+
+#define NUMPIXELS 32
+#define PIN 0
+
+
+#define NEO_PIN 0
+#define FAN_PIN 1
+#define TEMP_PIN 2
+#define PANEL_PIN TX
+
+
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
+unsigned long lastTime = 0;
+uint8_t line[8 * 3];
+
+void setup() {
+  Serial.begin(9600);
+
+  // put your setup code here, to run once:
+  pixels.begin();
+
+  pinMode(PANEL_PIN, INPUT_PULLUP);
+  pinMode(TEMP_PIN, INPUT);
+  pinMode(FAN_PIN, OUTPUT);
+}
+
+
+
+void loop() {
+  /* if(Serial.available() > 0) { */
+  /*   uint8_t row = Serial.read(); */
+  /*   Serial.readBytes(line, 8*3); */
+
+  /*   if(digitalRead(PANEL_PIN) == LOW) { // Front panel in place */
+  /*     for(uint8_t i = 0; i < 8; ++i) { */
+  /*       uint8_t * color = line + 3 * i; */
+  /*       pixels.setPixelColor(row * 8 + i, color[0], color[1], color[2]); */
+  /*     } */
+  /*     pixels.show(); */
+  /*   } */
+  /* } */
+
+   unsigned long now = millis();
+   unsigned long timeChange = (now - lastTime);
+   if(timeChange >= 1000) { // Update not more than once per second
+     int temp = analogRead(TEMP_PIN);
+     uint8_t speed = map(val, 0, 1023, 0, 255);
+     analogWrite(FAN_PIN, speed);
+     lastTime = now;
+   }
+}