DS3231 RTC with esp8266

Running a nodemcu lolin v3 and trying to communicate with a DS3231 which is on a ZS-042 board.
Tried using the module for DS3231 but no luck so far..

My Code:

I2C1.setup({scl:15,sda:0});
var rtc = require("DS3231").connect(I2C1, { DST : false });
setInterval(function() {
  console.log(rtc.readDateTime());
}, 1000);

Error:

in function called from system
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());

Any thoughts of what i might be doing wrong ? , maybe the module isn't right for me.