first commit

app.overlay

@@ -0,0 +1,42 @@
+/ {
+    chosen {
+        zephyr,console = &cdc_acm_uart0;
+        zephyr,shell-uart = &cdc_acm_uart0;
+    };
+};
+
+&zephyr_udc0 {
+    cdc_acm_uart0: cdc_acm_uart0 {
+        compatible = "zephyr,cdc-acm-uart";
+    };
+};
+
+
+&flash0 {
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        /* Reserve last 64KB for settings storage */
+        storage_partition: partition@3f0000 {
+            label = "storage";
+            reg = <0x003f0000 0x00010000>;
+        };
+    };
+};
+
+/ {
+    aliases {
+        sw0 = &door_sensor;
+    };
+
+    gpio_keys {
+        compatible = "gpio-keys";
+        
+        door_sensor: door_sensor {
+            gpios = <&gpio0 22 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+            label = "Door Reed Switch";
+        };
+    };
+};