From d643393f5545177bb35722c85fbcf6ee9659bbb0 Mon Sep 17 00:00:00 2001
From: syspart <52237906+syspart@users.noreply.github.com>
Date: Thu, 11 Jul 2019 19:48:46 +0200
Subject: [PATCH] Bricking the device with long messages
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Hello Jürgen, I had a problem with long text messages.
When sending more than 8192 bytes, the message(s) will be displayed, but after turning of it never starts again. So I lost 4 badges.
Greetings Klaus
---
 led-badge-11x44.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/led-badge-11x44.py b/led-badge-11x44.py
index 4cf6b5a..1c27b9f 100755
--- a/led-badge-11x44.py
+++ b/led-badge-11x44.py
@@ -463,6 +463,10 @@ if needpadding:
 
 # print(buf)      # array('B', [119, 97, 110, 103, 0, 0, 0, 0, 48, 48, 48, 48, 48, 48, 48, 48, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 60, 126, 255, 255, 255, 255, 126, 60, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
 
+if len(buf) > 8192:
+  print ("Writing more than 8192 bytes damages the display!")
+  sys.exit(1)
+
 if have_pyhidapi:
   pyhidapi.hid_write(dev, buf)
 else: