add more info

README.md

@@ -10,21 +10,29 @@ With this app  you will be able to :
  - control air conditioning
  - control lights and horn if your vehicle is compatible (mine isn't) 
 
-## I. Get all credendtials
+## I. Get all credentials
+We need to get all credentials from the MyPeugeot app data. To do that we will backup the app.
+We will retrieve those information:
+ - client-id and client-secret  for the api
+ - remote refresh token for the control of the vehicle
+
 1. Backup MyPeugeot app
 
     1.1 MyPeugeot app doesn't allow backup by default so you need to modify it.
     To do that you can follow this guide: https://forum.xda-developers.com/android/software-hacking/guide-how-to-enable-adb-backup-app-t3495117  
+    The original app can be downloaded [here](https://apkpure.com/fr/mypeugeot-app/com.psa.mym.mypeugeot) for example.
     
     1.2 Uninstall the original app
     
     1.3 Install the modified app
     
-    1.4 Enable developer mode on your android phone 
+    1.4 Login on the app and start a remote request (start preconditioning for example) to generate remote refresh token   
     
-    1.5 enable password for backup in developer option of your android phone (for some smartphone it is mandatory to sucessfuly backup app)
+    1.5 Enable developer mode on your android phone 
     
-    1.6 backup MyPeugeot app : 
+    1.6 enable password for backup in developer option of your android phone (for some smartphone it is mandatory to successfully backup app)
+    
+    1.7 backup MyPeugeot app : 
     
     ``` adb backup -f backup.ab -noapk com.psa.mym.mypeugeot ```