added readme

README.md

@@ -1,2 +1,58 @@
 # DJI-FCC-HACK
-A simple Android app that forces DJI NR1 remotes to FCC
+A simple Android app that forces DJI N1 remotes to FCC
+
+![screenshot.webp](.github/screenshot.webp)
+
+>[!WARNING]
+> This only works for drone with DJI N1 remotes. If you have a different remote, this app will not work for you.
+
+
+## How to use
+Download the latest release from the [releases page](https://github.com/M4TH1EU/DJI-FCC-HACK/releases) and install it on your Android device.
+
+>[!IMPORTANT]
+> You need to repeat the following steps every time you turn on the drone and/or remote.
+
+Then follow these steps:
+1. Turn on the drone and remote and wait a few seconds for them to connect.
+2. Connect your phone to the **bottom** USB port of the remote.
+3. Click on 'Send FCC Patch'.
+4. Disconnect your phone from the bottom USB port of the remote and connect it to the **top** USB port.
+5. Enjoy your drone with FCC mode.
+
+## Compatibility
+This app should work on any Android device running Android 8 and above.
+
+**Tested on the following drones:**
+- DJI Mavic Air 2
+- DJI Mini 4K
+
+>[!NOTE]
+> Please let me know if you have tested this app on another drone so I can update this README.
+
+## How do I know if it worked?
+Open the DJI Fly app and go to the Transmission tab. Look at the horizontal bar around -90 dBm:
+- If it lines up with the 1km mark, your drone is in CE mode.  
+- If it falls below the 1km mark, your drone is in FCC mode.  
+
+_Check the images below for reference._
+
+| FCC                           | CE                          |
+|-------------------------------|-----------------------------|
+| ![fcc.webp](.github/fcc.webp) | ![ce.webp](.github/ce.webp) |
+
+## FAQ
+### Does this work on iOS?
+No, this app is only available for Android.
+### Does this work on DJI Smart Controller?
+No, this app is only available for N1 remotes (the ones without a screen).
+### Does this work on DJI XYZ drone?
+Maybe? Give it a try and let me know if it does so I can update this README.
+### How does this work?
+This app simply sends a command to the remote to switch to FCC mode over the USB port.
+### Can I use this app to switch back to CE mode?
+No, this app only switches to FCC mode. To switch back to CE mode, you need to turn off the drone and remote and turn them back on.
+
+
+## Credits
+This app is based on the work of [galbb](https://mavicpilots.com/members/galbb.148459/) on the [MavicPilots forum](https://mavicpilots.com/threads/mavic-air-2-switch-to-fcc-mode-using-an-android-app.115027/).