writeByte / readByte

Question

writeByte / readByte

4r53N1ck opened this issue 2 years ago · comments

Hello! I have an issue (or two, I can't tell, really) with this library: readByte function returns only 0x000 on the serial monitor. I don't know if isn't writing, reading or none. I let you the sample code.

Note: Since I didn't know if my code was bad or not, I tride your other library (I2C_24LC1025) and these functions works on that one.

#include <Wire.h>
#include <I2C_eeprom.h>

uint32_t eepromSize;
uint8_t b, c, d;

#define SERIAL_OUT Serial

I2C_eeprom ee(0x50);

void setup(){
  SERIAL_OUT.begin(9600);
  ee.begin();
  if(!ee.isConnected()){
    SERIAL_OUT.println("No memory detected. Freezing.");
    while(1);
  }
  SERIAL_OUT.println("Memory detected!");
  delay(10);
  SERIAL_OUT.print("Memory size in bytes: ");
  eepromSize = ee.determineSize();
  SERIAL_OUT.print(eepromSize);
  SERIAL_OUT.print('\n');
  ee.writeByte(0x0000,0xA1);
  ee.writeByte(0x0001,0xB2);
  ee.writeByte(0x0002,0xC3);
  SERIAL_OUT.print("Your written data is: 0h");
  SERIAL_OUT.print(ee.readByte(0x0000),HEX);
  SERIAL_OUT.print(ee.readByte(0x0001),HEX);
  SERIAL_OUT.print(ee.readByte(0x0002),HEX);
  SERIAL_OUT.print('\n');
}

void loop(){
  
}

Rob Tillaart · Answer 1 · Thu Jan 12 2023 04:46:57 GMT+0800 (China Standard Time)

Thanks for the issue, I will look into it tomorrow

Rob Tillaart · Answer 2 · Thu Jan 12 2023 04:51:01 GMT+0800 (China Standard Time)

Which EEPROM type do you use?
Which board do you use?
Do you have pull up resistors on the I2C lines?

Rob Tillaart · Answer 3 · Thu Jan 12 2023 04:52:03 GMT+0800 (China Standard Time)

Can you post the output of the sketch sbove?

4r53N1ck · Answer 4 · Thu Jan 12 2023 05:15:53 GMT+0800 (China Standard Time)

EEPROM = AT24C32 (the one that comes with the DS1307 module)
Board = Arduino NANO (no clone)
Yes, I do have pull up resistors on the I2C lines (included in the module).

Output of the sketch:

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\4r53n1c\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\4r53n1c\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\4r53n1c\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -vid-pid=1A86_7523 -ide-version=10813 -build-path C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683 -warnings=none -build-cache C:\Users\4r53n1c\AppData\Local\Temp\arduino_cache_604481 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.arduinoOTA.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.avr-gcc.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -verbose C:\Users\4r53n1c\Desktop\PruebaEEPROM\PruebaEEPROM\PruebaEEPROM.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\4r53n1c\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\4r53n1c\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\4r53n1c\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -vid-pid=1A86_7523 -ide-version=10813 -build-path C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683 -warnings=none -build-cache C:\Users\4r53n1c\AppData\Local\Temp\arduino_cache_604481 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.arduinoOTA.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.avr-gcc.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -verbose C:\Users\4r53n1c\Desktop\PruebaEEPROM\PruebaEEPROM\PruebaEEPROM.ino
Using board 'nano' from platform in folder: C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Using core 'arduino' from platform in folder: C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Detecting libraries used...
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\eightanaloginputs" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp" -o nul -DARDUINO_LIB_DISCOVERY_PHASE
Alternatives for Wire.h: [Wire@1.0]
ResolveLibrary(Wire.h)
  -> candidates: [Wire@1.0]
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\eightanaloginputs" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\libraries\\Wire\\src" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp" -o nul -DARDUINO_LIB_DISCOVERY_PHASE
Alternatives for I2C_eeprom.h: [I2C_EEPROM@1.7.0]
ResolveLibrary(I2C_eeprom.h)
  -> candidates: [I2C_EEPROM@1.7.0]
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\eightanaloginputs" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\libraries\\Wire\\src" "-IC:\\Users\\4r53n1c\\Documents\\Arduino\\libraries\\I2C_EEPROM" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp" -o nul -DARDUINO_LIB_DISCOVERY_PHASE
Using cached library dependencies for file: C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\libraries\Wire\src\Wire.cpp
Using cached library dependencies for file: C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\libraries\Wire\src\utility\twi.c
Using cached library dependencies for file: C:\Users\4r53n1c\Documents\Arduino\libraries\I2C_EEPROM\I2C_eeprom.cpp
Generating function prototypes...
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\eightanaloginputs" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\libraries\\Wire\\src" "-IC:\\Users\\4r53n1c\\Documents\\Arduino\\libraries\\I2C_EEPROM" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp" -o "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\preproc\\ctags_target_for_gcc_minus_e.cpp" -DARDUINO_LIB_DISCOVERY_PHASE
"C:\\Program Files (x86)\\Arduino\\tools-builder\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compilando programa...
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\eightanaloginputs" "-IC:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\libraries\\Wire\\src" "-IC:\\Users\\4r53n1c\\Documents\\Arduino\\libraries\\I2C_EEPROM" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp" -o "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp.o"
Compiling libraries...
Compiling library "Wire"
Utilizando archivo previamente compilado: C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683\libraries\Wire\Wire.cpp.o
Utilizando archivo previamente compilado: C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683\libraries\Wire\utility\twi.c.o
Compiling library "I2C_EEPROM"
Utilizando archivo previamente compilado: C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683\libraries\I2C_EEPROM\I2C_eeprom.cpp.o
Compiling core...
Using precompiled core: C:\Users\4r53n1c\AppData\Local\Temp\arduino_cache_604481\core\core_arduino_avr_nano_cpu_atmega328_8f2a99cf4a6d84bb88672ca8a11c328a.a
Linking everything together...
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.elf" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\sketch\\PruebaEEPROM.ino.cpp.o" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\libraries\\Wire\\Wire.cpp.o" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\libraries\\Wire\\utility\\twi.c.o" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683\\libraries\\I2C_EEPROM\\I2C_eeprom.cpp.o" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/..\\arduino_cache_604481\\core\\core_arduino_avr_nano_cpu_atmega328_8f2a99cf4a6d84bb88672ca8a11c328a.a" "-LC:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683" -lm
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.elf" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.eep"
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.elf" "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.hex"
Usando librería Wire con versión 1.0 en la carpeta: C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\libraries\Wire 
Usando librería I2C_EEPROM con versión 1.7.0 en la carpeta: C:\Users\4r53n1c\Documents\Arduino\libraries\I2C_EEPROM 
"C:\\Users\\4r53n1c\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-size" -A "C:\\Users\\4r53n1c\\AppData\\Local\\Temp\\arduino_build_759683/PruebaEEPROM.ino.elf"
El Sketch usa 5252 bytes (17%) del espacio de almacenamiento de programa. El máximo es 30720 bytes.
Las variables Globales usan 513 bytes (25%) de la memoria dinámica, dejando 1535 bytes para las variables locales. El máximo es 2048 bytes.
C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude -CC:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf -v -patmega328p -carduino -PCOM13 -b115200 -D -Uflash:w:C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683/PruebaEEPROM.ino.hex:i 

avrdude: Version 6.3-20190619
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "C:\Users\4r53n1c\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"

         Using Port                    : COM13
         Using Programmer              : arduino
         Overriding Baud Rate          : 115200
         AVR Part                      : ATmega328P
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PC2
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom        65    20     4    0 no       1024    4      0  3600  3600 0xff 0xff
           flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
           lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : Arduino
         Description     : Arduino
         Hardware Version: 3
         Firmware Version: 4.4
         Vtarget         : 0.3 V
         Varef           : 0.3 V
         Oscillator      : 28.800 kHz
         SCK period      : 3.3 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: reading input file "C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683/PruebaEEPROM.ino.hex"
avrdude: writing flash (5252 bytes):

Writing | ################################################## | 100% 0.88s

avrdude: 5252 bytes of flash written
avrdude: verifying flash memory against C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683/PruebaEEPROM.ino.hex:
avrdude: load data flash data from input file C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683/PruebaEEPROM.ino.hex:
avrdude: input file C:\Users\4r53n1c\AppData\Local\Temp\arduino_build_759683/PruebaEEPROM.ino.hex contains 5252 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.70s

avrdude: verifying ...
avrdude: 5252 bytes of flash verified

avrdude done.  Thank you.

Output on the serial monitor:

Memory detected!
Memory size in bytes: 4096
Your written data is: 0h000

Rob Tillaart · Answer 5 · Thu Jan 12 2023 18:27:07 GMT+0800 (China Standard Time)

Quick check

latest version of the library 1.7.0
correctly determines the size of the AT24C32 (32Kb == 4KB == 4096) !! this uses read / write under the hood.
the value read is 0 for all three bytes, which is not expected.

Can you try this version, to check if there is an I2C error when writing?

#include <Wire.h>
#include <I2C_eeprom.h>

uint32_t eepromSize;
uint8_t b, c, d;

#define SERIAL_OUT Serial

I2C_eeprom ee(0x50);

void setup(){
  SERIAL_OUT.begin(9600);
  ee.begin();
  if(!ee.isConnected()){
    SERIAL_OUT.println("No memory detected. Freezing.");
    while(1);
  }
  SERIAL_OUT.println("Memory detected!");
  delay(10);
  SERIAL_OUT.print("Memory size in bytes: ");
  eepromSize = ee.determineSize();
  SERIAL_OUT.print(eepromSize);
  SERIAL_OUT.print('\n');

  SERIAL_OUT.println("\nWriteByte returns:");
  SERIAL_OUT.println(ee.writeByte(0x0000,0xA1), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0001,0xB2), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0002,0xC3), HEX);

  SERIAL_OUT.print("\nYour written data is: 0h");
  SERIAL_OUT.print(ee.readByte(0x0000),HEX);
  SERIAL_OUT.print(ee.readByte(0x0001),HEX);
  SERIAL_OUT.print(ee.readByte(0x0002),HEX);
  SERIAL_OUT.print('\n');
}

void loop(){
}

4r53N1ck · Answer 6 · Thu Jan 12 2023 18:32:01 GMT+0800 (China Standard Time)

This is the output:

Memory detected!
Memory size in bytes: 4096

WriteByte returns:
0
0
0

Your written data is: 0h000

Rob Tillaart · Answer 7 · Thu Jan 12 2023 18:34:02 GMT+0800 (China Standard Time)

datasheet - https://ww1.microchip.com/downloads/en/DeviceDoc/doc0336.pdf

found this in the top of the datasheet

Self-Timed Write Cycle (10 ms max)
The library uses a write delay of 5 ms.

please add a call after the isConnected() part

ee.setExtraWriteCycleTime(6000);

4r53N1ck · Answer 8 · Thu Jan 12 2023 18:35:44 GMT+0800 (China Standard Time)

Added. Still no luck.

Rob Tillaart · Answer 9 · Thu Jan 12 2023 18:36:29 GMT+0800 (China Standard Time)

This is the output:

Memory detected! Memory size in bytes: 4096

WriteByte returns: 0 0 0

Your written data is: 0h000

So there is no I2C error reported.

4r53N1ck · Answer 10 · Thu Jan 12 2023 18:37:44 GMT+0800 (China Standard Time)

Correct. Furthermore, I've tried your "writeBlock" function successfully (returns all 0 values which means it writes OK).

Rob Tillaart · Answer 11 · Thu Jan 12 2023 18:45:16 GMT+0800 (China Standard Time)

mmm, still have the feeling that timing is the cause.

The return of 0 means that I2C handshake is OK, it is still no 100% guarantee data is actually written.

You stated that I2C_24LC1025 library did work correctly.
Can you try to read the 3 EEPROM addresses with I2C_24LC1025 after you have written them with I2C_EEPROM lib
(be sure you do not overwrite when reading)

That should provide information if the data is written by the I2C_EEPROM lib

4r53N1ck · Answer 12 · Thu Jan 12 2023 18:48:08 GMT+0800 (China Standard Time)

OK, let me try that. Give me a moment.

Rob Tillaart · Answer 13 · Thu Jan 12 2023 18:56:48 GMT+0800 (China Standard Time)

Confirmed: I2C_eeprom.h is not writing on the EEPROM.

OK, that makes it strange that the determineSize() does work as it uses writeByte too.

Lets go "extreme",
can you put a delay(50) before every write() so it has enough time to do its internal thingies.

4r53N1ck · Answer 14 · Thu Jan 12 2023 18:57:27 GMT+0800 (China Standard Time)

I've tried the following:
Format EEPROM with I2C_24LC1025 library (all bytes should be 0xFF, right?).
Write 0xA1, 0xB2 and 0xC3 at 0, 1 and 2 EEPROM Addresses with I2C_eeprom library.
Read 0, 1 and 2 Addresses with I2C_24LC1025 and shows 0h000 again.

Rob Tillaart · Answer 15 · Thu Jan 12 2023 18:59:37 GMT+0800 (China Standard Time)

Format EEPROM with I2C_24LC1025 library (all bytes should be 0xFF, right?).

no ==> ee.setBlock(i, 0x00, 128);

Rob Tillaart · Answer 16 · Thu Jan 12 2023 19:00:14 GMT+0800 (China Standard Time)

How is the WP (writeProtect) pin connected?

WRITE PROTECT (WP): The write protect input, when tied to GND, allows normal write
operations. When WP is tied high to VCC, all write operations to the upper quandrant
(8/16K bits) of memory are inhibited. If left unconnected, WP is internally pulled down to
GND.

4r53N1ck · Answer 17 · Thu Jan 12 2023 19:00:42 GMT+0800 (China Standard Time)

WP is grounded on this DS1307 module.

Rob Tillaart · Answer 18 · Thu Jan 12 2023 19:01:31 GMT+0800 (China Standard Time)

Can you confirm that GND with a DMM? (multimeter)

4r53N1ck · Answer 19 · Thu Jan 12 2023 19:03:22 GMT+0800 (China Standard Time)

Confirmed WP pin is grounded with multimeter.

Let me try format, write and read, only this time setting bytes with 0xFF to see if there is some changes. I'm suspecting that "readByte" function returns a confirmation byte.

Rob Tillaart · Answer 20 · Thu Jan 12 2023 19:05:00 GMT+0800 (China Standard Time)

Note: Page 5 datasheet states that for the 1.8V version the writeCycleTime can even be 20 ms.

4r53N1ck · Answer 21 · Thu Jan 12 2023 19:13:56 GMT+0800 (China Standard Time)

This is what I've got so far:
Formatted with 0xFF values with your I2C_24LC1025-> OK
Read EEPROM at 0, 1 and 2 addresses with same library -> OK (Throws 0hFFFFFF on serial monitor)
Write EEPROM at 0, 1 and 2 addresses with same library-> OK (Tried reading same addresses with same library and throws 0xA1B2C3 on serial monitor)
Read EEPROM at 0, 1 and 2 addresses with I2C_eeprom library -> FAIL (Throws 0hFFFFFF on the serial monitor)

I'll make another test, formatting memory, writing it with I2C_eeprom and reading with I2C_24LC1025

4r53N1ck · Answer 22 · Thu Jan 12 2023 19:21:32 GMT+0800 (China Standard Time)

Confirmed: I2C_eeprom is not writing. I've changed A1B2C3 for AABBCC and still reads A1B2C3

Rob Tillaart · Answer 23 · Thu Jan 12 2023 19:27:13 GMT+0800 (China Standard Time)

Can you try this code

#include <Wire.h>
#include <I2C_eeprom.h>

uint32_t eepromSize;
uint8_t b, c, d;

#define SERIAL_OUT Serial

I2C_eeprom ee(0x50, 4096);  //  <<<<<<<<<<<<<<< explicit size

void setup(){
  SERIAL_OUT.begin(9600);
  ee.begin();
  if(!ee.isConnected()){
    SERIAL_OUT.println("No memory detected. Freezing.");
    while(1);
  }
  SERIAL_OUT.println("Memory detected!");
  delay(10);
  SERIAL_OUT.print("Memory size in bytes: ");
  eepromSize = ee.determineSize();
  SERIAL_OUT.print(eepromSize);
  SERIAL_OUT.print('\n');

  SERIAL_OUT.println("\nWriteByte returns:");
  SERIAL_OUT.println(ee.writeByte(0x0000,0xA1), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0001,0xB2), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0002,0xC3), HEX);

  SERIAL_OUT.print("\nYour written data is: 0h");
  SERIAL_OUT.print(ee.readByte(0x0000),HEX);
  SERIAL_OUT.print(ee.readByte(0x0001),HEX);
  SERIAL_OUT.print(ee.readByte(0x0002),HEX);
  SERIAL_OUT.print('\n');
}

void loop(){
}

4r53N1ck · Answer 24 · Thu Jan 12 2023 19:31:43 GMT+0800 (China Standard Time)

Yes! Now it works. But why is that "determineSize()" worked before?

4r53N1ck · Answer 25 · Thu Jan 12 2023 20:05:03 GMT+0800 (China Standard Time)

Well, I solved errors by re-declare constructor. This is how:

#include <Wire.h>
#include <I2C_eeprom.h>

uint32_t eepromSize, LastWrite, DeviceSize;
uint8_t b, c, d, PageSize;

#define SERIAL_OUT Serial



I2C_eeprom ee(0x50);  //  <<<<<<<<<<<<<<< explicit size

void setup(){
  SERIAL_OUT.begin(9600);
  ee.begin();
  if(!ee.isConnected()){
    SERIAL_OUT.println("No memory detected. Freezing.");
    while(1);
  }
  eepromSize = ee.determineSize();
  DeviceSize = ee.getDeviceSize();
  PageSize = ee.getPageSize();
  LastWrite = ee.getLastWrite();
  SERIAL_OUT.println("Memory detected!");
  delay(10);
  SERIAL_OUT.print("Memory size in bytes: ");
  SERIAL_OUT.print(eepromSize);
  SERIAL_OUT.print('\n');

  I2C_eeprom ee(0x50, eepromSize);               //<---We knew this works, so simply re-define with proper size
  //to use any EEPROM of any size on your projects.
  

  SERIAL_OUT.println("\nWriteByte returns:");
  SERIAL_OUT.println(ee.writeByte(0x0000,0xAA), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0001,0xBB), HEX);
  SERIAL_OUT.println(ee.writeByte(0x0002,0xCC), HEX);

  SERIAL_OUT.print("\nYour written data is: 0h");
  SERIAL_OUT.print(ee.readByte(0x0000),HEX);
  SERIAL_OUT.print(ee.readByte(0x0001),HEX);
  SERIAL_OUT.print(ee.readByte(0x0002),HEX);
  SERIAL_OUT.print('\n');
}

void loop(){
}

4r53N1ck · Answer 26 · Thu Jan 12 2023 20:09:04 GMT+0800 (China Standard Time)

And this is the serial monitor Output (I erased page size, device size and last write printings on the code above):

Memory detected!
Memory size in bytes: 4096
Page size in bytes: 8
Device size in bytes: 64
Last Write: 20680

WriteByte returns:
0
0
0

Your written data is: 0hAABBCC

Rob Tillaart · Answer 27 · Thu Jan 12 2023 20:10:26 GMT+0800 (China Standard Time)

Yes! Now it works. But why is that "determineSize()" worked before?

Yes, was pretty trivial in the end, I am used to using the default 32 KB EEPROMs, I hardly ever use others, so I missed it too.

DetermineSize() goes over all possible sizes and overrules temporary size settings.
That might the reason it worked with the incorrect pageSize.

Think I should add void setDeviceSize(size) and setPageSize(size) for debugging / overruling.
Maybe change the example sketches to use explicit device sizes.

Note:
You can use the constant: I2C_DEVICESIZE_24LC32 that looks a bit like your EEPROM type,
and keep in mind that the write cycle can be much longer than the lib supports. up to 20 ms.

If there are no further questions you may close the issue (as I consider it solved)

4r53N1ck · Answer 28 · Thu Jan 12 2023 20:11:59 GMT+0800 (China Standard Time)

Many thanks to you! Best regards. Solved!