From aa7b28233feca05328aa7fa1158bf78d7c82c658 Mon Sep 17 00:00:00 2001
From: Tim Huyeng <huyeng@iib.tu-darmstadt.de>
Date: Tue, 15 Nov 2022 11:58:33 +0100
Subject: [PATCH] add timer fix see:
 https://github.com/cyberman54/ESP32-Paxcounter/discussions/896

---
 lib/libpax/libpax_api.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/libpax/libpax_api.cpp b/lib/libpax/libpax_api.cpp
index 9d7cf9e..614175d 100644
--- a/lib/libpax/libpax_api.cpp
+++ b/lib/libpax/libpax_api.cpp
@@ -198,11 +198,14 @@ int libpax_counter_start() {
 int libpax_counter_stop() {
   wifi_sniffer_stop();
   stop_BLE_scan();
-  xTimerStop(PaxReportTimer, 0);
-  PaxReportTimer = NULL;
+  if (PaxReportTimer != NULL) {
+    xTimerStop(PaxReportTimer, 0);
+    PaxReportTimer = NULL;
+  }
   return 0;
 }
 
+
 int libpax_counter_count(struct count_payload_t* count) {
   fill_counter(count);
   return 0;