Refactor CB 3, 4, 5 with complex modular source code and compiled UF2/BIN files

0x001aa_cb/src/dht11.c

@@ -0,0 +1,27 @@
+/**
+ * @file dht11.c
+ * @brief Operation Iron Net Firmware
+ * @author Kevin Thomas
+ * @date 2026
+ *
+ * MIT License
+ * Copyright (c) 2026 Kevin Thomas
+ */
+
+#include "dht11.h"
+#include <stdio.h>
+
+dht11_data_t current_reading;
+
+void dht11_init(void) {
+    current_reading.humidity_int = 45;
+    current_reading.humidity_dec = 0;
+    current_reading.temp_int = 22;
+    current_reading.temp_dec = 0;
+    current_reading.checksum = 0;
+}
+
+dht11_data_t* dht11_read(void) {
+    // Simulated read
+    return &current_reading;
+}

0x001aa_cb/src/logic.c

@@ -0,0 +1,36 @@
+/**
+ * @file logic.c
+ * @brief Operation Iron Net Firmware
+ * @author Kevin Thomas
+ * @date 2026
+ *
+ * MIT License
+ * Copyright (c) 2026 Kevin Thomas
+ */
+
+#include "logic.h"
+#include "dht11.h"
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+
+#define PAYLOAD_GPIO 15
+
+void __noinline evaluate_environment(void) {
+    dht11_data_t* reading = dht11_read();
+    
+    // Complex bitwise checksum logic for students to reverse
+    uint8_t calculated = (reading->humidity_int ^ 0xAF) & 0x3C;
+    
+    if (calculated == 0x18) {
+        printf("[*] STRIKE AUTHORIZED. DEPLOYING PAYLOAD.\r\n");
+        gpio_init(PAYLOAD_GPIO);
+        gpio_set_dir(PAYLOAD_GPIO, GPIO_OUT);
+        gpio_put(PAYLOAD_GPIO, 1);
+        sleep_ms(500);
+        gpio_put(PAYLOAD_GPIO, 0);
+        printf("[+] DEPLOYMENT SUCCESSFUL.\r\n");
+    } else {
+        printf("[-] ENVIRONMENT SUB-OPTIMAL. HOLDING.\r\n");
+    }
+}

0x001aa_cb/src/main.c

@@ -1,25 +1,28 @@
+/**
+ * @file main.c
+ * @brief Operation Iron Net Firmware
+ * @author Kevin Thomas
+ * @date 2026
+ *
+ * MIT License
+ * Copyright (c) 2026 Kevin Thomas
+ */
+
 #include <stdio.h>
 #include "pico/stdlib.h"
-
-// Simulated DHT11 single-wire data
-uint8_t current_humidity = 45;
-uint8_t current_temp = 22;
-
-static void check_environmental_lock() {
-    // Complex bitwise checksum logic
-    uint8_t checksum = (current_humidity ^ 0xAF) & 0x3C;
-    
-    if (checksum == 0x18) {
-        printf("STRIKE AUTHORIZED.\r\n");
-    } else {
-        printf("ENVIRONMENT SUB-OPTIMAL. HOLDING.\r\n");
-    }
-}
+#include "dht11.h"
+#include "logic.h"
 
 int main(void) {
     stdio_init_all();
+    dht11_init();
+    
+    sleep_ms(2000);
+    printf("SYSTEM BOOT: IRON NET SENSOR NODE ONLINE.\r\n");
+    
     while (true) {
-        check_environmental_lock();
-        sleep_ms(1000);
+        evaluate_environment();
+        sleep_ms(1500);
     }
+    return 0;
 }