Update 'Teensy4.1_Datalogger new.ino'

Teensy4.1_Datalogger new.ino

           LED_Write = 5, LED_Normal = 6, LED_Batterie = 7, Grenz_U_Batterie = 13,
           taster_manuell_speichern = 28, Windfahne = 20, T_sensor_input = 17, Batterie_input = 38;
 
-int last_second, last_minute, last_hour, seconds_for_blink;
+int last_second, last_minute, last_hour;
+
 
 time_t getTeensy3Time() {
   return Teensy3Clock.get();
         summ = 0;
         square_summ = 0;
         cubic_summ = 0;
+        speed_min = speed_per_second[0];
+        speed_max = speed_per_second[0];
 
         for (int i = 0; i < amount_saved; i++) {
             summ = summ + pow((speed_per_second[i] - arithmetic_mean), 2);
     *ms10 = second() & 1 ? 100 : 0;
 }
 
-void write_sd() {
+void write_sd(int new_file) {
     digitalWrite(LED_Write, HIGH);
-    char file_name[50];
+    static char file_name[50];
 
     short int jahr = year();
     short int monat = month();
     short int stunde = hour();
     short int minut = minute();
     FsDateTime::setCallback(dateTime);
-    sprintf(file_name, "Windmessmast-%d.%d.%d_%d-%d.txt", jahr, monat, tag, stunde, minut);
+    if (new_file == 1) {
+        sprintf(file_name, "Windmessmast-%d.%d.%d_%d-%d.txt", jahr, monat, tag, stunde, minut);
+    }
     sd.begin(SD_CONFIG);
     if (!file.open(file_name, FILE_WRITE)) {
         digitalWrite(LED_Fail, HIGH);
 
 void every_second() {
 
+    static int  seconds_for_blink;
+
     anemometer_1.save_wind_speed();
     anemometer_2.save_wind_speed();
     anemometer_3.save_wind_speed();
     wind_vain_1.measure();
 
     if (digitalRead(taster_manuell_speichern) == HIGH){
-        write_sd();
+        write_sd(1);
     }
 
     digitalWrite(LED_Normal, LOW);
 }
 
 void every_hour() {
+    
+    static int first_time = 1;
 
-    write_sd();
+    if (hour() == 0 || first_time == 1) {
+        write_sd(1);
+        first_time = 0;
+    }
+    else {
+        write_sd(0);
+    }
     last_hour = hour();
 }