add platformio file and fix compiling without IP

.vscode/extensions.json

@@ -0,0 +1,7 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ]
+}

platformio.ini

@@ -0,0 +1,27 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[platformio]
+src_dir = examples/knx-demo
+
+
+[env]
+platform = atmelsam
+board = zeroUSB
+framework = arduino
+build_type = debug
+monitor_speed = 115200
+lib_ldf_mode = deep+
+lib_extra_dirs = 
+  ${sysenv.USERPROFILE}/Documents/PlatformIO/Projects
+build_flags = 
+  -Wno-unknown-pragmas 
+
+[env:build]

src/knx/knx_ip_device_information_dib.cpp

@@ -1,6 +1,7 @@
 #include "knx_ip_device_information_dib.h"
 #include "bits.h"
 
+#ifdef USE_IP
 KnxIpDeviceInformationDIB::KnxIpDeviceInformationDIB(uint8_t* data) : KnxIpDIB(data)
 {}
 
@@ -98,3 +99,4 @@ void KnxIpDeviceInformationDIB::friendlyName(const uint8_t* value)
 {
     pushByteArray(value, LEN_FRIENDLY_NAME, _data + 24);
 }
+#endif

src/knx/knx_ip_frame.cpp

@@ -54,7 +54,6 @@ void KnxIpFrame::totalLength(uint16_t length)
 {
     pushWord(length, _data + 4);
 }
-#endif
 
 uint8_t* KnxIpFrame::data()
 {
@@ -79,3 +78,4 @@ KnxIpFrame::KnxIpFrame(uint16_t length)
     protocolVersion(KnxIp1_0);
     totalLength(length);
 }
+#endif

src/knx/knx_ip_search_response.cpp

@@ -1,8 +1,6 @@
 #include "knx_ip_search_response.h"
 #ifdef USE_IP
 
-#endif
-
 #define SERVICE_FAMILIES 2
 
 KnxIpSearchResponse::KnxIpSearchResponse(IpParameterObject& parameters, DeviceObject& deviceObject)
@@ -61,3 +59,4 @@ KnxIpSupportedServiceDIB& KnxIpSearchResponse::supportedServices()
 {
     return _supportedServices;
 }
+#endif

src/knx/knx_ip_supported_service_dib.cpp

@@ -1,5 +1,6 @@
 #include "knx_ip_supported_service_dib.h"
 
+#ifdef USE_IP
 KnxIpSupportedServiceDIB::KnxIpSupportedServiceDIB(uint8_t* data) : KnxIpDIB(data)
 {}
 
@@ -39,3 +40,4 @@ void KnxIpSupportedServiceDIB::serviceVersion(ServiceFamily family,  uint8_t ver
         }
     }
 }
+#endif

src/knx/knx_value.cpp

@@ -526,7 +526,7 @@ struct tm KNXValue::timeValue() const
             return *timePtr;
         }
     }
-    struct tm tmp;
+    struct tm tmp = {0};
     return tmp;
 }