From e5f9c5813e13f2f5f5546b73551e4c69d4ebb5ec Mon Sep 17 00:00:00 2001
From: Roman Priesol <roman@priesol.net>
Date: Sat, 10 Oct 2026 17:41:05 +0200
Subject: [PATCH] stackchan: 40MHz flash, the IDF 5.5.5 bootloader misreads
 this flash at 80MHz

---
 mcu-stackchan.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mcu-stackchan.yaml b/mcu-stackchan.yaml
index 433604a..4e9505c 100644
--- a/mcu-stackchan.yaml
+++ b/mcu-stackchan.yaml
@@ -63,6 +63,7 @@ esphome:
 esp32:
   variant: esp32s3
   flash_size: 16MB
+  flash_frequency: 40MHz  # the IDF 5.5.5 bootloader reads garbage from this flash (mfr 0x46) at 80MHz
   toolchain: esp-idf
   framework:
     advanced: