examples: update READMEs

Author: proppy

examples/FirebaseDemo_ESP8266/README.md

@@ -13,16 +13,17 @@ FirebaseDemo is a sample that shows basic usage of the `FirebaseArduino` API.
 
 ## Configuration
 
-1. Go to https://www.firebase.com/ and create a new Firebase
-1. Copy the `Firebase Hostname`
-1. Go to `Secrets`
-1. Click `Firebase Secrets > Show`
-1. Copy the `Firebase Secret`
 1. Start Arduino
-1. Open `File > Examples > FirebaseArduino > FirebaseDemo_ESP8266`
-1. Replace `WIFI_SSID` and `WIFI_PASSWORD` with WiFi credentials
-1. Replace `FIREBASE_HOST` with the `Firebase Hostname` from step `2.`
-1. Replace `FIREBASE_AUTH` with `Firebase Secret` from step `5.`
+1. Open `File > Examples > FirebaseArduino > FirebaseRoom_ESP8266`
+1. In `FirebaseRoom_ESP8266`: Replace `WIFI_SSID` and `WIFI_PASSWORD` with WiFi credentials
+1. Go to https://firebase.google.com/console/ and create a new Firebase Project
+1. Go to `Database`
+1. Copy the `Database hostname` (Database URL without `https://` and trailing `/`)
+1. In `FirebaseRoom_ESP8266`: replace `FIREBASE_HOST` with the `Database Hostname`
+1. Go to  `⚙ > Project Settings > Database > Database secrets`
+1. Click `Firebase Secrets > Show`
+1. Copy the `Database Secret`
+1. In `FirebaseRoom_ESP8266`:  Replace `FIREBASE_AUTH` with `Database Secret`
 1. Select the board `Board > ESP8266 Modules > NodeMCU 1.0`
 1. Select the serial port  `Port > /dev/tty...`
 1. Select the upload speed `Upload Speed > 115200`