From ba76646f21fbbc5d5199bc734b26c2d4a2ac2809 Mon Sep 17 00:00:00 2001
From: Klaus K Wilting <Klaus.K.Wilting@deutschebahn.com>
Date: Wed, 4 Apr 2018 23:29:03 +0200
Subject: [PATCH] main.cpp: reduced i2c display speed (test)

---
 src/main.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index f0183945..dbde51ef 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -357,7 +357,8 @@ void DisplayKey(const uint8_t * key, uint8_t len, bool lsb) {
 void init_display(const char *Productname, const char *Version) {
     u8x8.begin();
     u8x8.setFont(u8x8_font_chroma48medium8_r);
-#ifdef HAS_DISPLAY  
+#ifdef HAS_DISPLAY
+    Wire.setClock(100000); // experimental: reduce I2C bus speed to avoid display errors (must be done after begin)
     uint8_t buf[32];
     u8x8.clear();
     u8x8.setFlipMode(0);