From de622fe640dcf745a6e64b2f0157d6fe68f5e2fc Mon Sep 17 00:00:00 2001
From: Florian Klemenz <loe.florian@gmail.com>
Date: Thu, 5 May 2022 12:39:03 +0200
Subject: [PATCH] adds infos about controlling the backlight

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 95f9671..94d4e52 100644
--- a/README.md
+++ b/README.md
@@ -124,5 +124,16 @@ If you like to change the default, just edit the ```fbdash.timer``` file before
     Wed 2022-05-04 14:16:10 CEST  28s left   Wed 2022-05-04 14:15:10 CEST  31s ago     fbdash.timer                 fbdash.service
     ...
 
+## Controlling the backlight
+It's a bit counterintuitive but according to [Notro's wiki](https://github.com/notro/fbtft/wiki/Backlight) you can control the backlight like this (tested, works!):
+
+Write a "1" to turn it **off**
+
+    echo 1 | sudo tee /sys/class/backlight/fb_ili9341/bl_power
+
+and a "0" to turn it **on**
+
+    echo 0 | sudo tee /sys/class/backlight/fb_ili9341/bl_power
+