OpenIPC 4G firmware for QuadroFleet
Drone build
This guide describes the components and steps for assembling the QuadroFleet drone module. The system is designed to be compatible with off-the-shelf FPV components, which reduces cost and ensures performance.
Specification
| Category | Component | Approx. price (€) | Link |
|---|---|---|---|
| Frame and drone core | Mark4 7-inch frame | 16 | AliExpress |
| iFlight XING E Pro 2207 1800KV 6S (4x) | 50 | AliExpress | |
| SpeedyBee F405 V4 FC + 55A ESC Stack | 80 | AliExpress | |
| Gemfan Hurrikan MCK v2 (2 pairs) | 3 | AliExpress | |
| GEP-M10Q GPS (optional, recommended) | 25 | AliExpress | |
| Video system | SSC30KQ Camera + 1.7mm Lens (OpenIPC) | 27 | AliExpress |
| Quectel EC25 4G Modem | 40 | AliExpress | |
| 4G FPC-Antenna Signal Booster | 2 | AliExpress | |
| Power system | DC-DC 12V-5V 3A Buck Converter | 2 | AliExpress |
| 3S/6S LiPo Battery Pack (3000–6000mAh) | 20–90 | Various | |
| Misc | Wires, XT60/XT30 connectors, mounts | ~10 | Local/Various |
| Control | XBOX/PlayStation/FPV RC Controller (USB) | Varies | Local/Various |
| Connectivity | SIM card with mobile data (4G/5G) | Varies | Local carrier |
Estimated total cost: €275–345 (excluding the controller and SIM card).
Note
If the component links are no longer available, try searching by name.
5G modems: You can also use 5G modems, but they are currently significantly more expensive than 4G.
Assembly steps
Frame and core
Preparing the main drone components and installing the base systems
- Assemble the Mark4 7-inch frame according to the manufacturer's instructions
- Install the iFlight XING E Pro 2207 motors (4 pcs.) and secure them to the frame
- Place the SpeedyBee F405 V4 FC + ESC stack in the center, keeping the UART ports accessible
- (Optional) Install the GEP-M10Q GPS module for improved tracking
- (Optional) Print cases for the SSC30KQ and the GPS module (STL files available at the link)
Video and connectivity
Setting up the video transmission system and network connectivity
- Install the SSC30KQ camera with a 1.7mm lens, ensuring a clear forward view
- Connect the camera to a UART port of the flight controller (e.g. UART2) for CRSF telemetry
- Connect the DC-DC buck converter to power the camera and modem (5V, 3A)
- Install the Quectel EC25 4G modem and connect the 4G FPC antenna for optimal signal
Power system
Providing reliable power to all system components
- Connect the 3S/6S battery to the ESC via the XT60 connector
- Connect the buck converter to the battery (12V input → 5V output for the camera and modem)
- Make sure all connections are insulated to avoid short circuits
Wiring
Wiring diagram and cable management
Main connections:
- Camera ↔ Flight controller: UART (TX/RX) for the CRSF protocol
- Modem ↔ Camera: USB for data transfer
- Buck converter: Battery → 12V input, 5V output to the modem
Important!
Secure the wires with zip ties to minimize the risk of vibration damage.
Testing
- Power on the drone and verify that the flight controller boots correctly.
- Check the camera connection (or flash it first) through the OpenIPC web interface (default IP via DHCP).
- Test the modem connection: insert the SIM card and confirm there is a 4G/5G signal.
- Install the Gemfan Hurrikan MCK v2 propellers, checking the correct rotation direction (CW/CCW).