hiii, in M24m01 125 i am using HAL_I2C_Mem_Write(&hi2c1,EEPROM_ADDRESS,0,0xFF,(uint8_t *)&data_to_write,1,10); HAL_Delay(10); uint8_t data_read; HAL_I2C_Mem_Read(&hi2c1,EEPROM_ADDRESS,0,0xFF,(uint8_t *)&data_read,1,1);