Setting number failed Firebase NodeMCU

NodeMCU is a low cost Open Source IoT platform to control hardware devices using software. In this article we will talk about how to fix setting number failed error in firebase nodemcu. This error comes when you have firebase used in your NodeMCU Arduino project and the firebase fingerprint is expired.

The problem comes when your NodeMCU is unable to connect to firebase.

Generate a new Firebase Fingerprint

As the Firebase Fingerprint is expired, you need to generate a new firebase fingerprint and use in your code.

  • Go to
  • Enter your firebase address ( in the search textbox
  • Click on “Fingerprint Site”
  • Copy the fingerprint value from “Security Certificate’s Authentic Fingerprint” column

Paste firebase fingerprint in your code

The next step is to paste the copied fingerprint value in your code.

If you are on Windows, go to following path-

C:/Users/{username}/My Documents/Arduino/libraries/firebase-arduino-master/src

Open FirebaseHttpClient.h file

Replace the existing fingerprint value with the new one and save the file.

Build and upload the code

Do not change anything in your project code. Just build it again and upload to your NodeMCU using Arduino.

Test the thing and it should work.


We learnt about how to fix the error setting number failed firebase NodeMCU. NodeMCU is a device used as a bridge between hardware and software. We control hardware devices with the help of NodeMCU from our smartphones.

1 thought on “Setting number failed Firebase NodeMCU

Leave a Reply

Your email address will not be published. Required fields are marked *