DS3231 RTC with esp8266

Tried your code and resulted in this error:

Uncaught InternalError: I2CWrite: No ACK 0
 at line 1 col 40
...teTo(104,[4,parseInt(a,16)]);this.i2c­.writeTo(104,[5,parseIn...
                              ^
in function "setDate" called from line 1 col 68
...onth(),Date().getFullYear());
                              ^
>Uncaught InternalError: I2CWrite: No ACK 0
 at line 1 col 27
this.i2c.writeTo(104,[0,0]);this.i2c.wri­teTo(104,[1,parseInt...
                          ^
in function "setTime" called from line 1 col 71
...utes(), Date().getSeconds());
                              ^
=undefined
Uncaught InternalError: I2CWrite: No ACK 0
 at line 1 col 23
this.i2c.writeTo(104,0);var a=this.i2c.readFrom(104,7),b=e(a...
                      ^
in function "readDateTime" called from line 1 col 30
console.log(rtc.readDateTime());