From ae1b610a9405793142b3be3c76c348da7cb44797 Mon Sep 17 00:00:00 2001
From: me <jiroiset@gmail.com>
Date: Sat, 1 Aug 2026 22:20:20 -0700
Subject: [PATCH] fix: M5Stack Unit C6L merged.bin fails to boot (flash_mode
 qio->dio)

Board manifest for esp32-c6-devkitm-1 defaults build.flash_mode to qio,
which this module's flash chip does not support -- causes a boot
crash-loop (repeated USB-Serial-JTAG reconnects) on real hardware.
Override with board_build.flash_mode = dio in the common M5Stack_Unit_C6L
section so it applies to all envs (ble/usb/repeater/room_server).
---
 variants/m5stack_unit_c6l/platformio.ini | 1 +
 1 file changed, 1 insertion(+)

diff --git a/variants/m5stack_unit_c6l/platformio.ini b/variants/m5stack_unit_c6l/platformio.ini
index 190add043..ea4d852d6 100644
--- a/variants/m5stack_unit_c6l/platformio.ini
+++ b/variants/m5stack_unit_c6l/platformio.ini
@@ -2,6 +2,7 @@
 extends = esp32c6_base
 board = esp32-c6-devkitm-1
 board_build.partitions = min_spiffs.csv ; get around 4mb flash limit
+board_build.flash_mode = dio ; board manifest defaults to qio, which causes a boot crash-loop on this module
 build_flags =
   ${esp32c6_base.build_flags}
   ${sensor_base.build_flags}