how to retrieve timestamp about firebase-esp8266 HOT 1 CLOSED

Thanks for addressing this.

Due to incorrect timestamp example, timestamp (Google's timestamp server value) is in millisecond and should read through doubleData which it is too large for integer.

Due to bug in Serial.print in Arduino, large value of double may print as ovf (overflow).
I recommend to use printf("%.0lf\n", firebaseData.doubleData()); for print timestamp in milliseconds.

I also update the library (v 2.1.6) to get timestamp in seconds which can read through intData() after you call setTimestamp.

The Timestamp example is updated to make proper printed timestamp value. All other example sketches that print the double value also changed to use printf.

The library also fixed the invalid data type for large double may returns as int, please update.

from firebase-esp8266.