add timesync and timezone setup

src/hardware/timesync.h

@@ -0,0 +1,67 @@
+#ifndef _TIME_SYNC_H
+    #define _TIME_SYNC_H
+
+    #include <TTGO.h>
+
+    #define TIME_SYNC_REQUEST    _BV(0)
+
+    #define TIMESYNC_CONFIG_FILE  "/timesync.cfg"
+
+    typedef struct {
+        bool timesync = true;
+        bool daylightsave = false;
+        int32_t timezone = 0;
+    } timesync_config_t;
+
+        /*
+     * @brief setup display
+     * 
+     * @param   ttgo    pointer to an TTGOClass
+     */
+    void timesync_setup( TTGOClass *ttgo );
+    /*
+     * @brief save config for timesync to spiffs
+     */
+    void timesync_save_config( void );
+    /*
+     * @brief read config for timesync from spiffs
+     */
+    void timesync_read_config( void );
+    /*
+     * @brief get the status if timesync enable/disable
+     * 
+     * @return true or false
+     */
+    bool timesync_get_timesync( void );
+    /*
+     * @brief enable/disable automatic timesync when wifi is connected
+     * 
+     * @param timesync  true or false
+     */
+    void timesync_set_timesync( bool timesync );
+    /*
+     * @brief get the status if daylightsave enable/disable
+     * 
+     * @return true or false
+     */
+    bool timesync_get_daylightsave( void );
+    /*
+     * @brief enable/disable daylight saving
+     * 
+     * @param daylightsave  true or false
+     */
+    void timesync_set_daylightsave( bool daylightsave );
+    /*
+     * @brief get the current timezone
+     * 
+     * @return  timezone from UTC-12 to UTC+12
+     */
+    int32_t timesync_get_timezone( void );
+    /*
+     * @brief set the current timezone
+     * 
+     * @param timezone timezone from UTC-12 to UTC+12
+     */
+    void timesync_set_timezone( int32_t timezone );
+
+#endif // _TIME_SYNC_H