From 4cb6516b758f59450ab54983c14767c7341b9044 Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Sun, 10 Apr 2016 01:59:37 +0200
Subject: [PATCH] Mqtt: avoid crash when not configured

---
 WifiControlSensor/MQTT.ino | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/WifiControlSensor/MQTT.ino b/WifiControlSensor/MQTT.ino
index 61df5c0..2165d7f 100644
--- a/WifiControlSensor/MQTT.ino
+++ b/WifiControlSensor/MQTT.ino
@@ -76,8 +76,9 @@ Adafruit_MQTT_Publish *MqttCreatePublisher(const char *fmt, ...){
 bool MqttIsConfigured() {
   return isMqttConfigured;
 }
+
 int MqttIsConnected() {
-  return mqtt->connected();
+  return (mqtt != NULL) ? mqtt->connected() : 0;
 }
 
 // Function to connect and reconnect as necessary to the MQTT server.
@@ -85,6 +86,9 @@ int MqttIsConnected() {
 int MqttConnect() {
   int8_t ret;
 
+  if(!isMqttConfigured)
+    return -1;
+
   // Stop if already connected.
   if (mqtt->connected()) {
     return 0;