rebuilt the arduino code and website, since i had lost it like an idiot.

speed_fan_controller_dynamic_pythonkeys_copy_20251115184748/.theia/launch.json

@@ -0,0 +1,8 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  "version": "0.2.0",
+  "configurations": [
+  
+  ]
+}

speed_fan_controller_dynamic_pythonkeys_copy_20251115184748/speed_fan_controller_dynamic_pythonkeys_copy_20251115184748.ino

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+// Fan control via Serial - works with ultra-responsive Python script
+// Pin 11 = PWM output to fan (use transistor/MOSFET/driver for high current!)
+
+const int FAN_PIN = 11;
+
+void setup() {
+  Serial.begin(115200);
+  pinMode(FAN_PIN, OUTPUT);
+  analogWrite(FAN_PIN, 0); // Start stopped
+  Serial.println("Fan controller ready. Use 0-9, f=full, s=stop");
+}
+
+void loop() {
+  if (Serial.available() > 0) {
+  char cmd = Serial.read();
+
+    int speed = 0; // 0 to 255 for analogWrite
+
+    if (cmd >= '0' && cmd <= '9') {
+      speed = map(cmd - '0', 0, 9, 0, 255); // 0-9 → 0-255
+    }
+    else if (cmd == 'f' || cmd == 'F') {
+      speed = 255;
+    }
+    else if (cmd == 's' || cmd == 'S') {
+      speed = 0;
+    }
+    else {
+      // Ignore invalid commands, but optionally echo
+      Serial.print("?");
+      return;
+    }
+
+    // Apply speed
+    analogWrite(FAN_PIN, speed);
+
+    // Send feedback: percentage
+    int percent = map(speed, 0, 255, 0, 100);
+    Serial.print(percent);
+    Serial.println("%");
+  }
+}