Saving of user Settings added.

docs/README.md

@@ -88,7 +88,7 @@ lib_deps =
 
 # Known issues
 
-Current implementation doesn't retain the user data in the non-volatile memory of the MCU. This is because there is a issue/bug that makes accessing such saved data early after device boot up fail. Probably because when it comes to the built-in library: `preferences.h`, it needs some time to fetch data after initialising and opening a namespace. It seems to be running on a dedicated core, parallely. 
+Currently there are no known issues. If there is any, please open an issue in the `issus` section with a relavant label.
 
 # Screenshot Gallery
 

include/Constants.h

@@ -13,6 +13,7 @@
 #define DHTTYPE DHT11 // DHT 11
 #define NTP_SERVER "pool.ntp.org"
 #define UTC_OFFSET_DST 0 // Daytime offset is not implemented. hence kept zero to have no effect.
-#define DEFAULT_UTC_OFFSET 19800 // 5:30 hours in seconds.i.e. Sri lankas time.
+#define DEFAULT_UTC_OFFSET_H 5
+#define DEFAULT_UTC_OFFSET_M 30
 #define WIFI_SSID "MSI 8690"
 #define WIFI_PASSWORD "abcdefgh"

include/Functions.h

@@ -11,7 +11,7 @@ void go_to_menu();
 void update_time_with_check_alarm();
 void println(String text, int column, int row, int text_size, bool display_now = false, int color = WHITE);
 void println(tm timeinfo, const char *text, int column, int row, int text_size, bool display_now = false, int color = WHITE);
-void show_modal_page(const unsigned char* bitmap,int period, String text, int x_offset);
+void show_modal_page(const unsigned char *bitmap, int period, String text, int x_offset);
 
 // FUnctions from temperature.cpp
 void check_temp();
@@ -20,3 +20,10 @@ void check_temp();
 void set_time_zone();
 void update_time();
 void print_time_now();
+
+// Functions of preferences.cpp
+void load_user_settings();
+void save_time_zone();
+void save_alarm(int alarm);
+void reset_preferences();
+void save_is_alarm_enabled();

include/Globals.h

@@ -1,20 +1,26 @@
 #include <Adafruit_SSD1306.h>
 #include <DHT.h>
+#include <Preferences.h>
 
 extern Adafruit_SSD1306 display;
 extern DHT dhtSensor;
+extern Preferences preferences;
 
 extern bool alarm_enabled;
 extern const int n_alarms;
 extern int alarm_hours[];
 extern int alarm_minutes[];
 extern bool alarm_triggered[];
 extern struct tm timeinfo;
+extern int temp_offset_hours;
+extern int temp_offset_minutes;
+// images
 extern const unsigned char splashScreen[];
 extern const unsigned char tick[];
 extern const unsigned char wifi[];
 extern const unsigned char waveformAnimation[31][1024];
-extern const unsigned char time_zone [];
-extern const unsigned char alarm_ring [];
-extern const unsigned char alarm_disable [];
-extern const unsigned char medicine_time [];
+extern const unsigned char time_zone[];
+extern const unsigned char alarm_ring[];
+extern const unsigned char alarm_disable[];
+extern const unsigned char medicine_time[];
+extern const unsigned char reset[];

src/alarms.cpp

@@ -2,11 +2,11 @@
 #include <Functions.h>
 #include <Constants.h>
 
-bool alarm_enabled = true;
+bool alarm_enabled;
 const int n_alarms = 3;
-int alarm_hours[] = {0, 1, 2};
-int alarm_minutes[] = {1, 10, 20};
-bool alarm_triggered[] = {false, false, false};
+int alarm_hours[n_alarms];
+int alarm_minutes[n_alarms];
+bool alarm_triggered[n_alarms];
 
 const int n_notes = 8;
 const int C = 262;
@@ -21,9 +21,9 @@ const int notes[] = {C, D, E, F, G, A, B, C_H};
 
 void ring_alarm()
 {
-        // Turning the LED ON
+    // Turning the LED ON
     digitalWrite(LED_1, HIGH);
-    show_modal_page(medicine_time ,1000,"It's Medicine Time!", 8);
+    show_modal_page(medicine_time, 200, "It's Medicine Time!", 8);
     // Ringing the buzzer
 
     bool break_happened = false;
@@ -57,20 +57,20 @@ void set_alarm(int alarm)
     {
         display.clearDisplay();
         display.fillRoundRect(23, 12, 39, 34, 4, WHITE);
-        println(formatNumber(temp_hour), 26, 18, 3,false, BLACK);
-        println(formatNumber(temp_minute), 76, 18, 3,true, WHITE);
-        println(":", 60, 18, 3,true, WHITE);
+        println(formatNumber(temp_hour), 26, 18, 3, false, BLACK);
+        println(formatNumber(temp_minute), 76, 18, 3, true, WHITE);
+        println(":", 60, 18, 3, true, WHITE);
         int pressed = wait_for_button_press();
 
         if (pressed == PB_UP)
         {
-            delay(200);
+            delay(50);
             temp_hour++;
             temp_hour = temp_hour % 24;
         }
         else if (pressed == PB_DOWN)
         {
-            delay(200);
+            delay(50);
             temp_hour--;
             temp_hour = temp_hour % 24;
             if (temp_hour < 0)
@@ -80,36 +80,36 @@ void set_alarm(int alarm)
         }
         else if (pressed == PB_OK)
         {
-            delay(200);
+            delay(50);
             alarm_hours[alarm] = temp_hour;
             break;
         }
         else if (pressed == PB_CANCEL)
         {
-            delay(200);
+            delay(50);
             return;
         }
     }
 
     while (true)
     {
         display.fillRoundRect(23, 12, 39, 34, 4, BLACK);
-        println(formatNumber(temp_hour), 26, 18, 3,false, WHITE); 
-        //Above two lines removes the white background around the hour setting state.(i.e. inverts the hour part of the display back.)
+        println(formatNumber(temp_hour), 26, 18, 3, false, WHITE);
+        // Above two lines removes the white background around the hour setting state.(i.e. inverts the hour part of the display back.)
         display.fillRoundRect(73, 12, 39, 34, 4, WHITE);
-        println(formatNumber(temp_minute), 76, 18, 3,true, BLACK);
+        println(formatNumber(temp_minute), 76, 18, 3, true, BLACK);
 
         int pressed = wait_for_button_press();
 
         if (pressed == PB_UP)
         {
-            delay(200);
+            delay(50);
             temp_minute++;
             temp_minute = temp_minute % 60;
         }
         else if (pressed == PB_DOWN)
         {
-            delay(200);
+            delay(50);
             temp_minute--;
             temp_minute = temp_minute % 60;
             if (temp_minute < 0)
@@ -119,15 +119,26 @@ void set_alarm(int alarm)
         }
         else if (pressed == PB_OK)
         {
-            delay(200);
+            delay(50);
             alarm_minutes[alarm] = temp_minute;
+            if (!alarm_enabled)
+            {
+                alarm_enabled = true;
+                save_is_alarm_enabled();
+                for (int i = 0; i < n_alarms; i++)
+                {
+                    alarm_triggered[i] = true;
+                }
+                alarm_triggered[alarm] = false;
+            }
 
-            show_modal_page(alarm_ring,1000,"Alarm set to "+formatNumber(temp_hour)+":"+formatNumber(temp_minute),10);
+            show_modal_page(alarm_ring, 1000, "Alarm set to " + formatNumber(temp_hour) + ":" + formatNumber(temp_minute), 10);
+            save_alarm(alarm);
             break;
         }
         else if (pressed == PB_CANCEL)
         {
-            delay(200);
+            delay(50);
             break;
         }
     }