Doing research for first PCB design with RP2040 microcontroller. I have found a minimal design that I will use as a reference. I have also found a datasheet for the RP2040 microcontroller.

led_strip_door/led_strip_door.ino

@@ -4,12 +4,17 @@
 #define GREEN 33
 #define BLUE 32
 
+// Relay pin
+#define RELAY 26
+
+bool isOn = false;
 
 void setup() {
   // Set the pins as outputs
   pinMode(RED, OUTPUT);
   pinMode(GREEN, OUTPUT);
   pinMode(BLUE, OUTPUT);
+  pinMode(RELAY, OUTPUT);
   Serial.begin(9600);
 }
 
@@ -31,23 +36,23 @@ void setColor(int red, int green, int blue) {
   return;
 }
 
-void stop() {
-  // Function which turns off the pins 
-  analogWrite(RED, 0);
-  analogWrite(GREEN, 0);
-  analogWrite(BLUE, 0);
 
-  Serial.println("Turning off the LED strip");
-  printValues();
-  return;
+// Function that toggles the RELAY
+void toggle() {
+  if (isOn) {
+    digitalWrite(RELAY, LOW);
+    isOn = false;
+  } else {
+    digitalWrite(RELAY, HIGH);
+    isOn = true;
+  }
 }
 
 
 
-
 void loop() {
   // Alternate between off and white over 5 seconds
-  stop();
+  toggle();
   delay(5000);
   setColor(255, 255, 255);
   delay(5000);