From 55315b7301706f3a9acb21bc8be8e0548e16ac0f Mon Sep 17 00:00:00 2001
From: Klaus K Wilting <klaus.k.wilting@deutschebahn.com>
Date: Tue, 16 Jun 2020 18:04:56 +0200
Subject: [PATCH] m5fire.h note added

---
 src/hal/m5fire.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hal/m5fire.h b/src/hal/m5fire.h
index 9572f6bf..a35bbb93 100644
--- a/src/hal/m5fire.h
+++ b/src/hal/m5fire.h
@@ -2,6 +2,9 @@
 // upload_speed 921600
 // board m5stack-fire
 
+// note use of GPIO16/17
+// https://www.bjoerns-techblog.de/2019/03/m5stack-fire-eine-uebersicht/
+
 #ifndef _M5FIRE_H
 #define _M5FIRE_H