update readme and fix minor errors

* Update bash command for library installation.
* change: small EEPROMs (1 - 2Kbits) are not supported because pageSize = 8 < 10 (max byteNumber in MFRC522).
* change: using pages in the `EraseAllCards()` function to speed up writing.

README.md

@@ -29,7 +29,7 @@ Go to the Libraries Manager on [PlatformIO](https://platformio.org/platformio-id
 Or use `platformIO Core CLI` and paste the following command:
 
 ```bash
-pio lib install "gogovega/RFID to EEPROM@^1.1.0"
+pio pkg install --library "gogovega/RFID to EEPROM@^1.1.0"
 ```
 
 ## How It Works
@@ -58,7 +58,6 @@ void begin(twiClockFreq_t twiFreq);
 Use one of the enumerations below to set EEPROM Size:
 ```
 {
-  RFIDtoEEPROM_I2C::kbits_2,
   RFIDtoEEPROM_I2C::kbits_4,
   RFIDtoEEPROM_I2C::kbits_8,
   RFIDtoEEPROM_I2C::kbits_16,
@@ -101,6 +100,7 @@ This library contains several functions:
 
 ## Future Features
 
+- Support for small I2C EEPROMs (1 - 2Kbits).
 - Increase the number of recordable Cards (currently set to 255).
 - Improve error handling.
 

src/Card/Card.cpp

@@ -72,9 +72,11 @@ void Card::ClearCardNumber()
 */
 void Card::EraseAllCards()
 {
-  for (uint32_t n = 0; n < Code::length(); n++)
+  byte Code[_pageSize] = {};
+
+  for (uint32_t n = 0; n < (Code::length() / _pageSize); n++)
   {
-    Code::write(n, 0);
+    Code::write((n * _pageSize), Code, _pageSize);
   }
 }
 
@@ -86,7 +88,7 @@ void Card::CardRestoration(uint8_t nbr)
 {
   /* Uncomment if you want to reset the Card
   byte Code[_byteNumber] = {};
-  Code::Write(OFFSET(nbr), Code, _byteNumber);
+  Code::write(OFFSET(nbr), Code, _byteNumber);
   */
 
   Code::write(0, nbr);
@@ -125,7 +127,7 @@ bool Card::SaveCard(uint8_t *Code, uint8_t size)
   const uint8_t nbr = CardNumber();
 
   // if size different from Constructor or better than 16
-  if ((size != _byteNumber) || (size > 16))
+  if ((size != _byteNumber) || (size > _pageSize))
     return (NULL);
 
   // if Number of Cards over limit!
@@ -160,7 +162,7 @@ bool Card::CardCheck(uint8_t *Code, uint8_t size)
   byte CodeRead[_byteNumber];
 
   // if size different from Constructor or better than 16
-  if ((size != _byteNumber) || (size > 16))
+  if ((size != _byteNumber) || (size > _pageSize))
     return (NULL);
 
   for (uint8_t i = 0; i < nbr; i++)

src/Card/Card.h

@@ -56,6 +56,7 @@ class Card : protected Code
     void CardRestoration(uint8_t nbr);
     uint8_t _byteNumber;
     uint8_t _maxCards;
+    uint8_t _pageSize = 16;
 };
 
 #endif // _Card_h

src/RFIDtoEEPROM/RFIDtoEEPROM.h

@@ -41,7 +41,6 @@ class RFIDtoEEPROM_I2C : public Card
     //EEPROM size in kbits.
     enum eeprom_size_t
     {
-      kbits_2 = 2,
       kbits_4 = 4,
       kbits_8 = 8,
       kbits_16 = 16,