Fix all functions

examples/AllFunctions/AllFunctions.ino

@@ -60,6 +60,7 @@
 #define TINY_GSM_TEST_SMS true
 #define TINY_GSM_TEST_USSD true
 #define TINY_GSM_TEST_BATTERY true
+#define TINY_GSM_TEST_GPS false
 // powerdown modem after tests
 #define TINY_GSM_POWERDOWN false
 
@@ -82,6 +83,11 @@ const char wifiPass[] = "YourWiFiPass";
 #include <TinyGsmClient.h>
 
 #if TINY_GSM_TEST_GPRS && not defined TINY_GSM_MODEM_HAS_GPRS
+#undef TINY_GSM_TEST_GPRS
+#undef TINY_GSM_TEST_CALL
+#undef TINY_GSM_TEST_SMS
+#undef TINY_GSM_TEST_USSD
+#undef TINY_GSM_TEST_WIFI
 #define TINY_GSM_TEST_GPRS false
 #define TINY_GSM_TEST_CALL false
 #define TINY_GSM_TEST_SMS false
@@ -89,9 +95,15 @@ const char wifiPass[] = "YourWiFiPass";
 #define TINY_GSM_TEST_WIFI true
 #endif
 #if TINY_GSM_TEST_WIFI && not defined TINY_GSM_MODEM_HAS_WIFI
+#undef TINY_GSM_USE_GPRS
+#undef TINY_GSM_USE_WIFI
 #define TINY_GSM_USE_GPRS true
 #define TINY_GSM_USE_WIFI false
 #endif
+#if TINY_GSM_TEST_GPS && not defined TINY_GSM_MODEM_HAS_GPS
+#undef TINY_GSM_TEST_GPS
+#define TINY_GSM_TEST_GPS false
+#endif
 
 #ifdef DUMP_AT_COMMANDS
   #include <StreamDebugger.h>
@@ -215,7 +227,7 @@ void loop() {
   DBG("Phone number (USSD):", ussd_phone_num);
 #endif
 
-#if defined(TINY_GSM_MODEM_HAS_GPS)
+#if TINY_GSM_TEST_GPS
   modem.enableGPS();
   String gps_raw = modem.getGPSraw();
   modem.disableGPS();