Comments on: ESP32/ESP8266: Firebase Authentication (Email and Password)

By: Sara Santos

Sara Santos — Wed, 25 Feb 2026 17:01:31 +0000

In reply to tom.

Hi.
Yes. That’s right.
They changed the interface a bit. So, now you need to add a web app for it to create an API key.
Regards,
Sara

By: tom

tom — Tue, 24 Feb 2026 04:53:41 +0000

Greetings from 2026. Minor update to step 3 getting the API key.Once your on the project settings page the API key is not automatically generated. You have to select ‘add app’ and chose between ios android or web. I chose web, it asked me a few more questions then generated the API key. loaded the example code onto an ESP32 and it works

By: Hansie

Hansie — Wed, 16 Oct 2024 19:13:05 +0000

Good day I am trying to read data from realtime Database in firebase but my code gives permission denied.I am able to authenticate the esp32 and sign it in to firebase and post data to the database my problem is when I try to read data from the database.This is the code block that is supposed to retreive the data.

I want to retreive the depth from the database .

Uid
Devices
device ID
-depth

void getValues()
{
if (Firebase.ready())
{
if (Firebase.RTDB.getString(&fbdo,uid +”/Devices/” + deviceID + “/depth”))
{
if (fbdo.dataType() == “string”)
{
depth= fbdo.stringData();
Serial.println(depth);
}
}
else
{
Serial.println(fbdo.errorReason());
}

}
else
{
Serial.println(fbdo.errorReason());
}
}
Capture

By: Hansie

Hansie — Wed, 16 Oct 2024 17:10:26 +0000

In reply to Sara Santos. Have you made the totorial on retrieving the data from database after logging in with email and password

By: Hansie

Hansie — Wed, 16 Oct 2024 15:35:27 +0000

Thanks it workes great can you please help with retreiving data from the realtime Database with the authentication?

By: Lawrence

Lawrence — Sat, 28 Sep 2024 13:27:17 +0000

Anyone who’ve done this using SIM800 or similar?

By: alessandro masonal

alessandro masonal — Thu, 25 Jul 2024 08:38:40 +0000

Hi, I encountered a weird error…. it logs in normally for the auth but after a while the connection gets refused by firebase. I thought the reason being the token’s expiration, but it keeps saying that the tokes aren’t expired yet.
Maybe a bug with the library?

By: Lawrence

Lawrence — Wed, 29 May 2024 15:01:23 +0000

How can we achieve this with any sim module?

By: lahu

lahu — Sat, 23 Sep 2023 09:43:20 +0000

Instead of filling in the API_KEY statically, I can set it dynamically so that it can be changed via the app or web, for example.
Can you suggest me how to do it?

By: Ajith

Ajith — Wed, 12 Oct 2022 12:00:45 +0000

In reply to Sara Santos.

Hi Sara,
Thank you for your reply. After a long search finally found a solution and tested also(after 10 days still running with no issue)
loop()
if(Firebase.isTokenExpired())
firebase.ready()