Since EEPROM has been found, you I2C bus is working, but DS1307 didn't responded, it is problably badly wired or defective. If you are using those small PCB having both EEPROM and DS1307 on the same board, you need to verify if those have separate I2C buses or not, if separate, you need to connect both of them.
Since EEPROM has been found, you I2C bus is working, but DS1307 didn't responded, it is problably badly wired or defective. If you are using those small PCB having both EEPROM and DS1307 on the same board, you need to verify if those have separate I2C buses or not, if separate, you need to connect both of them.