DS18B20 module hang up ESP8266 ESP-12F?

Hello,

my DS18B20 test does reboot device after 36 times of data reading (Espruino v1.89). Test code:

var ow = new OneWire(D14);
var sensor = require("DS18B20").connect(ow);
var cnt=1;

function getTC() {
  sensor.getTemp(function (temp) {
    console.log("Temp is "+temp+"°C : ",cnt++); 
  });
  setTimeout( function() { getTC(); }, 1000 );
}

if(sensor.isPresent())
  getTC();
else
  console.log('no sensor detected');

Console output:

...
Temp is 23.25°C :  34
Temp is 23.25°C :  35
Temp is 23.25°C :  36
>
 ets Jan  8 2013,rst cause:2, boot mode:(3,4)
load 0x40100000, len 2408, room 16
tail 8
chksum 0xe5
load 0x3ffe8000, len 776, room 0
tail 8
chksum 0x84
load 0x3ffe8310, len 632, room 0
tail 8
chksum 0xd8
csum 0xd8
2nd boot version : 1.6
  SPI Speed      : 80MHz
  SPI Mode       : QIO
  SPI Flash Size & Map: 32Mbit(512KB+512KB)
jump to run user1 @ 1000

Disconnected

The call of sensor.getTemp() without callback a little extends the live time.

• might I lost something?
  
• could you suggest me, how to fix this?
  
  

Thank you in the advance!