From bb013a69d332a6e5713762fbea499a8cfb8e69f8 Mon Sep 17 00:00:00 2001
From: Jacob Dahl <37091262+dakejahl@users.noreply.github.com>
Date: Tue, 26 May 2026 15:50:47 -0400
Subject: [PATCH] docs(arkv6x): note bootloader UART7/TELEM1 mapping (#27429)

* docs(arkv6x): note bootloader UART7/TELEM1 mapping

The ARKV6X bootloader enables only UART7 (TELEM1), but the existing
serial port table reflects the runtime mapping where /dev/ttyS0 is
GPS1. Users flashing firmware over UART with px_uploader.py hit a
dead end when targeting GPS1 because no other UART responds in
bootloader mode.

* docs(arkv6x): fix uploader script name and add link

Script is named px4_uploader.py in the Tools directory; link to it
on GitHub so readers can find it.
---
 docs/en/flight_controller/ark_v6x.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/en/flight_controller/ark_v6x.md b/docs/en/flight_controller/ark_v6x.md
index 3d6af0bf2d..f4b27c007e 100644
--- a/docs/en/flight_controller/ark_v6x.md
+++ b/docs/en/flight_controller/ark_v6x.md
@@ -72,6 +72,10 @@ For pinout of the ARKV6X see the [DS-10 Pixhawk Autopilot Bus Standard](https://
 | UART7  | /dev/ttyS6 | TELEM1        |
 | UART8  | /dev/ttyS7 | GPS2          |
 
+::: info
+The mapping above applies to the running PX4 firmware. The ARKV6X bootloader enables only `UART7` (TELEM1), so when flashing firmware over UART with [`px4_uploader.py`](https://github.com/PX4/PX4-Autopilot/blob/main/Tools/px4_uploader.py) you must connect to the **TELEM1** port — no other UART will respond in bootloader mode.
+:::
+
 ## Building Firmware
 
 ```sh