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+
+ 📡 Micro Radar
+
+
+ a tiny open-source flight radar for your desk
+
+
+ 
+
+
+ PREREQUISITES - ASSEMBLY - USAGE - FAQ
+
+
+## Prerequisites
+
+At the core of this project is the ESP32-C3 module with an integrated 240x240 IPS screen. No soldering required. The module does all the heavy lifting.
+
+I used dark grey PLA filament for the print, but any colour will work just fine. For the lens (optional but recommended), you'll need clear-drying epoxy to secure it (not super glue, which will fog up the lens. Ask me how I know.)
+
+### Tools you'll need
+
+- Small screwdriver (for M2 screws)
+- Soldering iron (for setting the threaded inserts)
+
+Set up a clean, organised workspace before you start. You'll be handling small components and epoxy, so a dedicated area helps. Keep a damp cloth nearby for cleaning if needed, and ensure your soldering iron has adequate ventilation.
+
+### Shopping List
+
+Everything you need is below. I've linked products I used and recommend for ease of build, though alternatives exist on Amazon and elsewhere. If you deviate from this hardware, you may need to modify the enclosure and/or code.
+
+- [ ] [1.28" Round GC9A01 240x240 IPS Display Module with ESP32-C3 (no-touch)](https://www.aliexpress.com/item/1005008482665220.html)
+- [ ] [USB-C Ribbon Extension Cable (5cm, CMUP-CFPCB-BK)](https://www.aliexpress.com/item/1005005371248824.html)
+- [ ] [M2 Heat-set Threaded Inserts (+ soldering iron)](https://www.aliexpress.com/item/1005008493831823.html)
+- [ ] [32.5mm Round Mineral Glass Lens (optional, recommended)](https://www.aliexpress.com/item/1005004783554496.html)
+- [ ] [Gorilla Epoxy (necessary for fitting lens, useful anyway)](https://www.amazon.co.uk/Gorilla-Glue-25ml-Epoxy/dp/B009NQQJFC)
+
+### Accounts / API
+
+This project uses OpenSky's API for retrieving flight data.
+
+I highly recommend making an account, as it's free, and allows the radar to make many more requests per day (400 -> 4000), which makes the live view much more accurate. However, it isn't necessary if you prefer.
+
+You can sign up [here](https://opensky-network.org), or search "OpenSky".
+
+Further info on what to do with the account is in the usage section.
+
+## Assembly
+
+Once you've got all the parts, assembly typically takes 1-2 hours (excluding print time).
+
+**I strongly recommend reading the [Usage](#usage) section before you start assembly.** It'll help with troubleshooting if anything goes wrong. You might want to test the firmware and your hardware before closing everything up.
+
+### Step 1: 3D Print
+
+
+
+Print all four STLs from `./hardware/stl/`:
+
+- Main enclosure
+- Front plate
+- Bezel
+- 2 spacers
+
+### Step 2: Heat-set Threaded Inserts
+
+**You'll need:** Soldering iron, M2 threaded inserts
+
+Start with the front plate: insert 2mm M2 threaded inserts into the larger holes using the soldering iron.
+
+
+
+Next, the two spacers. These might warp slightly, that's fine. Insert 6mm M2 inserts into each.
+
+
+
+Finally, the main enclosure. Insert 5mm M2 inserts.
+
+
+
+Et voilà .
+
+
+
+### Step 3 (Optional): Fitting the Lens
+
+
+
+**You'll need:** Clear-drying epoxy, small applicator (match or cocktail stick works)
+
+This is the fiddliest bit. Keep it neat and you'll avoid frustration:
+
+- Apply epoxy to the front plate, not the lens
+- Lower the front plate onto the lens (easier to manage excess epoxy)
+- Have a cleaner ready for the edges (I used nail polish remover, your mileage may vary)
+- Less is more with epoxy
+- Work on a surface that won't bond to epoxy
+
+
+
+Let the epoxy cure according to its label before moving on.
+
+### Step 4: Bezel
+
+**You'll need:** 2x5mm M2 screws, 2x10mm M2 screws
+
+Secure the bezel to the front plate using 2x5mm M2 screws through the threaded inserts you added earlier.
+
+
+
+Screw 2x10mm M2 screws through the remaining two holes. They should protrude from the back.
+
+
+
+Peel the protective film off the screen and position it over the lens. The screws you just inserted will guide the display into place.
+
+Before clamping it down with the spacers, **make sure the antenna is attached to the module**. Press it down firmly onto the flat surface until it clicks. Orientation doesn't matter, but you do need this connection otherwise you won't get any WiFi signal.
+
+
+
+
+
+Now screw the spacers into those protruding screws to clamp the module in place. I recommend keeping the board plugged in at this point to help with alignment. Don't use much force, too much pressure will stress the screen.
+
+Once you're happy with the alignment, you can add a small amount of epoxy around the module to lock it in place permanently (optional, but recommended if you're happy with the build).
+
+### Step 5: Final Assembly
+
+**You'll need:** USB-C ribbon extension cable, 4x7mm M2 screws, optional rubber feet
+
+Attach the USB-C ribbon cable to the case with the provided nuts and bolts.
+
+
+
+
+
+If you like, remove the supports from the bottom and insert rubber feet.
+
+
+
+Plug in the board, then attach the front plate using 4x7mm M2 screws.
+
+
+
+Done!
+
+
+
+## Usage
+
+### Flashing the Firmware
+
+You'll need [VS Code](https://code.visualstudio.com/) with the [PlatformIO IDE extension](https://marketplace.visualstudio.com/items?itemName=platformio.platformio-ide) installed. Once installed, restart VS Code, open the repository folder, and dependencies will pull in automatically.
+
+Plug the board in via USB-C, then hit the upload button (→) in the bottom status bar. If the board doesn't reboot with the new firmware automatically, hold the BOOT button on the back and press RESET once, then release BOOT.
+
+The board should auto-detect, but if you hit an upload failure, check that the correct board is selected in the status bar. If it still won't upload, try:
+
+- Disconnect and reconnect the USB cable
+- Check that your cable supports data transfer (some USB-C cables are charge-only)
+- Try a different USB port on your computer
+
+Read more about PlatformIO [here](https://docs.platformio.org/en/latest/).
+
+### First Boot
+
+On first boot, the radar broadcasts a WiFi hotspot called `MicroRadar-Setup`. Connect to it from your phone or laptop and a configuration page will appear automatically (or go to your browser if it doesn't). Enter your WiFi credentials and hit save. The board will restart and connect to your network.
+
+If the hotspot doesn't appear straight away, give it a moment. If it still hasn't appeared after 30 seconds, exit the WiFi settings on your device and go back in to force a refresh. It'll usually show up then.
+
+### Configuration
+
+Once connected to your network, the radar config is accessible at [http://microradar.local](http://microradar.local) from any device on the same network.
+
+Here you can set:
+
+- **Location** (latitude and longitude): the centre point of your radar
+- **Radar radius**: how wide the scan extends (in degrees, 2 degrees is the limit to avoid rate limiting)
+- **Display options**: toggle visual elements
+- **OpenSky credentials**: your client ID and secret (if you've made an account - again, highly recommend!)
+
+
+
+If you've made an OpenSky account (which I highly recommend), you can find your credentials under your account settings at opensky-network.org. With authentication, you get 4000 requests per day instead of 400, making the live view much more accurate. Read more about the API [here](https://opensky-network.org).
+
+This configuration page is accessible anytime the device is connected to WiFi, so you can tweak settings whenever you want.
+
+That's it! Once you've configured everything, you should see a live view of all flights over your location. Enjoy :)
+
+
+
+## FAQ
+
+> the port is busy or doesn't exist
+
+Restart VS Code *after* plugging in the device. If VS Code was already open, it may default to a stale port from before the device was connected.
+
+If that doesn't work, look for the button with a small "Plug" icon on VS Code's bottom bar (it might say "auto", "cu.usbmodem101", or similar). Click it and select the option that shows your device's name.
+
+
+> the 3D print failed
+
+If you're using a Bambu Lab printer, make sure you're opening the `.3mf` file, since it includes the correct print bed and settings.
+
+Using a different printer? Open an [Issue](../../issues) and I'll try to help where I can.
+
+
+> `ModuleNotFoundError: No module named 'intelhex'` when building
+
+This appears to be a Windows-specific issue. Either of these should fix it:
+
+**Option A:**
+1. Open the PlatformIO terminal (PlatformIO sidebar → Miscellaneous → PlatformIO Core CLI)
+2. Run `pip install intelhex`
+3. Rebuild
+
+**Option B:**
+1. Open a new terminal in VS Code (Terminal → New Terminal)
+2. Run `python -m pip install intelhex`
+3. Rebuild
+
+## Notes
+
+> Designed and developed as part of a wedding present for a mate who loves aviation (congratulations to both him and his wife!)
+
+> Inspired by [therealhacksaw](https://www.instagram.com/therealhacksaw/)'s desk radar
+
+> Built with ♥︎ in London