Log temperature and humidity without SD-card

1#include <dht11.h>
2#include <EEPROM.h>
3
4#define DHT11PIN 4
5
6dht11  DHT11;
7unsigned int address = 0; //variable to iterate through the addresses  of the EEPROM
8unsigned int delaytime = 1; //delay between readings in seconds
9
10void  setup(){
11  delay(1000);
12  Serial.begin(9600);
13
14  unsigned int i = 0;
15  while(EEPROM.read(1023) >= i){   //this loop prints the saved data from the EEPROM
16    Serial.print("Time: ");
17    Serial.print((i * delaytime/2)/60);
18    Serial.println("  min.");
19    Serial.print("Temperature: ");
20    Serial.println(EEPROM.read(i));
21    ++i;
22    Serial.print("Humidity: ");
23    Serial.print(EEPROM.read(i));
24    Serial.println("%");
25    ++i;
26    Serial.println();
27
28    delay(100);
29  }
30
31//  while(EEPROM.read(1023) >= i){   //this loop plots the saved data  from the EEPROM
32//    Serial.print(EEPROM.read(i));
33//    Serial.print("  ");
34//    Serial.println(EEPROM.read(i+1));
35//    ++i;
36//    ++i;
37//
38//    delay(100);
39//  }
40
41  delay(20000); //this delay will give you 20 seconds  before the new data is written to the EEPROM
42                //if you want to  keep the old data you have to reset the board before the delay is over
43}
44
45
46
47void  loop(){
48  delay(delaytime*1000 - 10); //delay between the readings
49  
50  int chk = DHT11.read(DHT11PIN);
51  EEPROM.update(address, DHT11.temperature);  //the temperature reading is written to the EEPROM
52  ++address;
53  delay(10);
54  EEPROM.update(address, DHT11.humidity); //the humidity reading is written to the  EEPROM
55  ++address;
56
57  EEPROM.write(1023, address);
58}