From 381c3ca61658983c9836545603869a185f04eee8 Mon Sep 17 00:00:00 2001
From: Giuseppe Roberti <giuseppe.roberti@ieee.org>
Date: Tue, 30 Aug 2022 11:55:17 +0200
Subject: [PATCH] Fix hard fault when str is NULL

---
 src/utility/BLEUuid.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/utility/BLEUuid.cpp b/src/utility/BLEUuid.cpp
index fba6244a..0465ea9a 100644
--- a/src/utility/BLEUuid.cpp
+++ b/src/utility/BLEUuid.cpp
@@ -30,6 +30,11 @@ BLEUuid::BLEUuid(const char * str) :
   memset(_data, 0x00, sizeof(_data));
 
   _length = 0;
+
+  if (str == NULL) {
+    return;
+  }
+
   for (int i = strlen(str) - 1; i >= 0 && _length < BLE_UUID_MAX_LENGTH; i -= 2) {
     if (str[i] == '-') {
       i++;