fix: prevent infinite WiFi connection loop (#11)

Author: niziek58

platformio.ini

@@ -16,3 +16,6 @@ lib_deps =
 	adafruit/Adafruit BMP280 Library@^2.6.8
 	adafruit/Adafruit AHTX0@^2.0.5
 	claws/BH1750@^1.3.0
+monitor_speed = 115200
+upload_speed = 921600
+

src/utils.cpp

@@ -60,21 +60,29 @@ void isolate_all_rtc_gpio()
 
 /**
  * Establishes a WiFi connection using credentials from env.h
- *
- * @note This function will block indefinitely if WiFi connection fails
- * TODO(FIX): this surely shouldn't be implemented this way
- * TODO(FIX): we should FIX it ASAP as it already caused issues
  */
 void connect_to_wifi()
 {
     serial_log("Connecting to WiFi...");
     WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
-    while (WiFi.status() != WL_CONNECTED) {
+    for (int i = 0; i < 20; i++) {
+        if (WiFi.status() == WL_CONNECTED) {
+            serial_log("\nWiFi connected!");
+            serial_log(WiFi.localIP().toString());
+            return;
+        }
+        if (WiFi.status() == WL_NO_SSID_AVAIL) {
+            Serial.println("SSID not found!");
+            Serial.println("Entering deep sleep for 5 minutes.");
+            esp_sleep_enable_timer_wakeup(300000000);
+            esp_deep_sleep_start();
+        }
         delay(500);
         serial_log(".");
     }
-    serial_log("\nWiFi connected!");
-    serial_log(WiFi.localIP().toString());
+    
+    Serial.println("Response: " + String(WiFi.status()));
+    ESP.restart();
 }
 
 /**