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docs: Remove all discontinued FCs (#26642)

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Hamish Willee
2026-03-05 08:03:07 +11:00
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docs/en/flight_controller/pixfalcon.md
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<Redirect to="../flight_controller/autopilot_discontinued" />
<!--
# Pixfalcon Flight Controller (Discontinued)
<Badge type="info" text="Discontinued" px4_current="v1.15" year="2024"/>
::: warning
This flight controller has been [discontinued](../flight_controller/autopilot_experimental.md) and is no longer commercially available.
:::
::: warning
PX4 does not manufacture this (or any) autopilot.
Contact the [manufacturer](https://holybro.com/) for hardware support or compliance issues.
:::
The Pixfalcon autopilot (designed by [Holybro<sup>&reg;</sup>](https://holybro.com/)) is binary-compatible (FMUv2) derivative of the [Pixhawk 1](../flight_controller/pixhawk.md) design that has been optimized for space-constrained applications such as FPV racers. It has less IO to allow for the reduction in size.
![Pixfalcon hero image](../../assets/hardware/hardware-pixfalcon.png)
## Quick Summary
- Main System-on-Chip: [STM32F427](https://www.st.com/en/microcontrollers-microprocessors/stm32f427-437.html)
- CPU: 180 MHz ARM<sup>&reg;</sup> Cortex<sup>&reg;</sup> M4 with single-precision FPU
- RAM: 256 KB SRAM (L1)
- Failsafe System-on-Chip: STM32F100
- CPU: 24 MHz ARM Cortex M3
- RAM: 8 KB SRAM
- GPS: u-blox<sup>&reg;</sup> M8 (bundled)
### Connectivity
- 1x I2C
- 2x UART (one for Telemetry / OSD, no flow control)
- 8x PWM with manual override
- S.BUS / PPM input
## Availability:
No longer available.
Optional hardware:
- Optical flow: PX4 Flow unit from manufacturer [Holybro](https://holybro.com/products/px4flow)
- Digital Airspeed sensor from manufacturer [Holybro](https://holybro.com/products/digital-air-speed-sensor-ms4525do)
- On screen display with integrated Telemetry:
- Micro HKPilot Telemetry Radio Module with On Screen Display (OSD) unit - 433MHz. (Discontinued)
- Pure Telemetry options:
- [SIK Radios](../telemetry/sik_radio.md)
## Building Firmware
::: tip
Most users will not need to build this firmware!
It is pre-built and automatically installed by _QGroundControl_ when appropriate hardware is connected.
:::
To [build PX4](../dev_setup/building_px4.md) for this target:
```sh
make px4_fmu-v2_default
```
## Debug Port
This board does not have a debug port (i.e it does not have a port for accessing the [System Console](../debug/system_console.md) or the [SWD interface](../debug/swd_debug.md) (JTAG).
Developers will need to solder wires to the board test pads for SWD, and to the STM32F4 (IC) TX and RX to get a console.
## Serial Port Mapping
| UART | Device | Port |
| ------ | ---------- | ------------------------ |
| UART1 | /dev/ttyS0 | IO Debug |
| USART2 | /dev/ttyS1 | TELEM1 (No flow control) |
| UART4 | /dev/ttyS2 | GPS |
<!-- Note: Got ports using https://github.com/PX4/PX4-user_guide/pull/672#issuecomment-598198434 -->
text="Discontinued" px4_current="v1.15" year="2024". This change in 202603 -->