Tweak GPS, but we might have a loose cable somewhere, or a misconfiguration.

iot/main/gps.cpp

@@ -15,10 +15,13 @@ TinyGPSLocation gps_location() {
 	Serial.print("[gps] Getting location: ");
 	// We WILL discover our location - if it's the last thing we do!
 	while(true) {
+		if(millis() > 5000 && gps.charsProcessed() < 10) {
+			Serial.print(F("\n[error] Failed to initialise GPS device."));
+			while(true) { delay(1); }
+		}
+		
 		// Make sure there's something to read
 		if(serial_gps.available() <= 0) {
-			Serial.print("!");
-			delay(100);
 			continue;
 		}