[iot/main] Fix compilation errors

.gitignore

@@ -1,4 +1,5 @@
 config.custom.h
+settings.custom.h
 
 Reports/*.pdf
 

iot/main/gps.h

@@ -22,7 +22,7 @@ void gps_fetch();
  * Call gps_fetch() first.
  * @return TinyGPSLocation	The current location.
  */
-TinyGPSLocation gps_info();
+TinyGPSPlus gps_info();
 
 /**
  * Ends the connection to the GPS device and puts it to sleep in order to save 

iot/main/radio.cpp

@@ -1,9 +1,9 @@
-#pragma once
-
 #include <lmic.h>
 #include <hal/hal.h>
 #include <SPI.h>
 
+#include "settings.h"
+
 // Global static variable that's used to detect when LMIC has finished doing it's thing
 static bool is_sending_complete = false;
 

iot/main/radio.h

@@ -10,4 +10,4 @@ void radio_init();
  * @param data   The message to send.
  * @param length The length of the given message.
  */
-void radio_send(byte* data, int length);
+bool radio_send(byte* data, int length);

iot/main/settings.custom.h.example

@@ -0,0 +1,13 @@
+
+// LoRaWAN NwkSKey, network session key
+// This is the default Semtech key, which is used by the early prototype TTN
+// network.
+static const PROGMEM u1_t NWKSKEY[16] = { .... };
+
+// LoRaWAN AppSKey, application session key
+// This is the default Semtech key, which is used by the early prototype TTN
+// network.
+static const u1_t PROGMEM APPSKEY[16] = { ..... };
+
+// LoRaWAN end-device address (DevAddr)
+static const u4_t DEVADDR = 0x....; // <-- Change this address for every node!

iot/main/settings.h

@@ -1,6 +1,17 @@
 #pragma once
 
-#include <arduino-lmic/src/hal/hal.h>
+#include <lmic.h>
+#include <hal/hal.h>
+#include <SPI.h>
+
+#include "settings.custom.h"
+
+/*
+ * This is the main settings file - customise it to match your setup.
+ * Don't forget that you need to take a copy of settings.custom.h.example as
+ * settings.custom.h, and fill in the private keys the program needs to talk 
+ * over LORaWAN.
+ */
 
 //////////////////////////////////
 ////////////// Main //////////////
@@ -20,16 +31,17 @@
 /// RFM95 ///
 /////////////
 
+// The SPI chip-select pin for the RFM 95
+#define PIN_SPI_CS_RFM95	10
+
 // Pin mapping
 const lmic_pinmap lmic_pins = {
-	.nss = 10,
+	.nss = PIN_SPI_CS_RFM95,
 	.rxtx = LMIC_UNUSED_PIN,
 	.rst = 9,
 	.dio = {2, 6, 7},
 };
 
-// The SPI chip-select pin for the RFM 95
-#define PIN_SPI_CS_RFM95	10
 
 /////////////////////////////////
 ////////////// GPS //////////////