4#define ENABLE_GxEPD2_GFX 1 
    5#define ENABLE_GxEPD2_4G_GFX 1 
   29        int8_t 
connect_wifi(
const char *ssid, 
const char *password, uint8_t attempts);
 
   30        int8_t 
connect_wifi(
const char *ssid, 
const char *password);
 
 
int8_t disable_everything()
 
int8_t deep_sleep_timer_wakeup(uint64_t sleep_time_us)
 
virtual int8_t enable_display()
 
virtual int8_t disable_display()
 
int8_t connect_wifi(const char *ssid, const char *password, uint8_t attempts)
 
int8_t deep_sleep_button_wakeup(uint8_t gpio_num)
 
int8_t deep_sleep_timer_button_wakeup(uint64_t sleep_time_us, uint8_t gpio_num)