void setup() 
{ 
  Serial.begin(19200);
  delay(250);
  while(Serial.available())
    Serial.read();
} // setup

void loop() 
{ 
  if(!lcd_updatetime)
    lcd_update();

  my_delay(100);

      // --------------- serial in ---------------
      if (Serial.available() > 0) 
      { char incomingByte = (char)Serial.read();
        if(incomingByte == 13)  // Wenn das Enter ankommt
        { strcpy(serial_in_command, serial_in_buff);
          memset(&serial_in_buff[0], 0, sizeof(serial_in_buff)); // 30.554 Bytes
          chr_cnt = 0;
        }
        else // Falls kein Enter kommt muss der Text gespeichert werden in dem inText Array
        { if(isprint(incomingByte))
          { if(chr_cnt<(MAXBUFFER-2))
              serial_in_buff[chr_cnt++] = incomingByte;
            else
            { Serial.println(F("serBUF ov-> DEL"));
              memset(&serial_in_buff[0], 0, sizeof(serial_in_buff)); // 30.554 Bytes
              memset(&serial_in_command[0], 0, sizeof(serial_in_command)); // 30.554 Bytes
              chr_cnt=0;
            } // if(chr_cnt<(MAXBUFFER-1))
          } // if(isprint(incomingByte))
        } // if !(incomingByte == 13)
      } // if (Serial.available() > 0) 

      if(strlen(serial_in_command))
      { Serial.println(); Serial.print(serial_in_command); Serial.println(F("->erkannt")); // 30.608 Bytes

        if( strstr(serial_in_command, "help") || ( strstr(serial_in_command, "?") && strlen(serial_in_command)==1 ) )
        { // help screen
          Serial.println(F("\ncommands:\n"));

          Serial.println(F("up"));
          Serial.println(F("reset"));
          Serial.println(F(""));

        }

    
        else if( strstr(serial_in_command, "up") )
        { if( strlen(serial_in_command) == 2 && !faehrt )
          { *serial_in_command=0;
            alle_fahren(1);
          } // if( strlen(serial_in_command) == 2 && !faehrt )
          else if( strstr(serial_in_command, "up?") )
          { sprintf_P(s_out_str, PSTR("up %s Uhr"), MY_EEP_VAR.fenster_up_time_str); Serial.println(s_out_str);
          }
          else if( strlen(serial_in_command) >= 7 )
          { uint8_t hh=atoi(strncpy(serial_in_buff, &serial_in_command[2], 2));
            if( 0 <= hh && hh <= 12)
            { uint8_t mm = atoi(strncpy(serial_in_buff, &serial_in_command[5], 2)); 
              if( 0 <= mm && mm < 60)
              { if( strcmp(MY_EEP_VAR.fenster_up_time_str, MY_EEP_VAR.sonnenaufgang_time_str) || !strcmp(MY_EEP_VAR.fenster_up_time_str, MY_EEP_VAR.sonnenaufgang_time_str) ) 
                  sprintf( MY_EEP_VAR.fenster_up_time_str, "%02d:%02d", hh, mm);
                else                  
                  Serial.println(F("up unveraendert")); 
                Serial.print(F("up_time: ")); Serial.println(MY_EEP_VAR.fenster_up_time_str);
                my_i2c_eeprom_write_buffer( sizeof(jar_str), (char*)&MY_EEP_VAR, sizeof(MY_EEP_VAR) );   
                Serial.println(F("EEP_W"));
              } // if( 0 <= mm && mm < 60)
              else
                DEBUG_PRINTLN(F("ERROR mm Fehler uptime nicht gestellt !"));
            } // if( 0 <= hh && hh <= 12)
            else
              DEBUG_PRINTLN(F("ERROR hh Fehler uptime nicht gestellt !"));
          } // else if( strlen(serial_in_command) >= 7 )              
        } // if( strstr(serial_in_command, "up") )

        else if( !strcmp(serial_in_command, "reset") )
        { // "reset"
          delay(250);
          {asm("ldi r30,0"); asm("ldi r31,0"); asm("ijmp");}
        } // if( !strcmp(serial_in_command, "reset") )
        *serial_in_command=0;
      } // if(strlen(serial_in_command))

} // loop()