diff --git a/node1.c b/node1.c
index f5e0d4f..9c430f5 100644
--- a/node1.c
+++ b/node1.c
@@ -8,9 +8,10 @@
 #include <pico/types.h>
 #include <stdio.h>
 
-#define SENSOR_READING_INTERVAL_US (1000000 * 15) // 15 seconds
+#define SENSOR_READING_INTERVAL_US (1000000 * 30) // 30 seconds
 #define WIFI_CHECK_INTERVAL_US (1000000 * 10)     // 10 seconds
 #define WIFI_STATUS_LED_PIN 16
+#define RESTART_INTERVAL_MIN (12 * 60) // 12 hours in minutes
 
 static tcp_client_config tcp_config;
 static bme280_config bem_config;
@@ -20,6 +21,11 @@ static pms5003_reading current_pms5003_reading;
 char msg_to_send[256];
 
 static int8_t readings_index = 0;
+static absolute_time_t startup_time;
+
+static uint64_t absolute_time_diff_min(absolute_time_t from, absolute_time_t to) {
+  return absolute_time_diff_us(from, to) / (1000000 * 60);
+}
 
 static void send_msg(char *msg) {
   bool success = tcp_client_send_message(&tcp_config, msg);
@@ -92,6 +98,7 @@ int main() {
   // Poll every 5 seconds
   absolute_time_t last_check = get_absolute_time();
   absolute_time_t last_sensor_reading = get_absolute_time();
+  startup_time = get_absolute_time();
 
   while (1) {
     watchdog_update();
@@ -129,8 +136,7 @@ int main() {
         snprintf(msg_to_send, sizeof(msg_to_send), "M02,%.2f,%.2f,%2f\n",
                  current_pms5003_reading.pm1, current_pms5003_reading.pm2_5,
                  current_pms5003_reading.pm10);
-        printf(
-            "Sending particle matter readings to backend server...\n");
+        printf("Sending particle matter readings to backend server...\n");
         send_msg(msg_to_send);
       }
 
@@ -172,6 +178,12 @@ int main() {
       }
     }
 
+    // Check if 12 hours have elapsed for restart
+    if (absolute_time_diff_min(startup_time, now) >= RESTART_INTERVAL_MIN) {
+      printf("12-hour restart interval reached. Restarting...\n");
+      watchdog_reboot(0, 0, 0); // Force immediate restart via watchdog
+    }
+
     sleep_ms(100);
   }