Implementing GPS and PB

sender.ino

@@ -0,0 +1,89 @@
+#include <SPI.h>
+#include <LoRa.h>
+#include <TinyGPS++.h>
+#include <SoftwareSerial.h>
+
+#include "pb_common.h"
+#include "pb.h"
+#include "pb_encode.h"
+
+#include "message.pb.h"
+
+unsigned long previousMillis = 0;
+const long interval = 5000;
+float lat = 0;
+float lng = 0;
+
+TinyGPSPlus gps;
+
+SoftwareSerial ss(6, 7);
+
+void setup() {
+  Serial.begin(9600);
+  ss.begin(9600);
+  
+  while (!Serial);
+
+  Serial.println("LoRa Transceiver");
+
+  if (!LoRa.begin(915E6)) {
+    Serial.println("Starting LoRa failed!");
+    while (1);
+  }
+   LoRa.setSpreadingFactor(7);
+}
+
+void loop() {
+
+  int packetSize = LoRa.parsePacket();
+  if (packetSize) {
+    Serial.print("Received Packet: ");
+    while (LoRa.available()) {
+      Serial.print((char) LoRa.read());  
+    }
+    Serial.println();
+  }
+
+  unsigned long currentMillis = millis();
+  if (currentMillis - previousMillis >= interval) {
+    previousMillis = currentMillis;
+
+    // Gather GPS data
+    if (gps.location.isValid()) {
+      Serial.println("Valid GPS");
+      lat = gps.location.lat();
+      lng = gps.location.lng(); 
+    } else {
+      lat = 0;
+      lng = 0;  
+    }
+
+    // Encode as protobuf packet
+    if (1) {
+      uint8_t buffer[10];
+      Fenceless_Coordinate m = Fenceless_Coordinate_init_zero;
+      pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+      //m.x = lat;
+      //m.y = lng;
+      m.x = 44.558750;
+      m.y = -123.283744;
+
+      if (!pb_encode(&stream, Fenceless_Coordinate_fields, &m)) {
+        Serial.println("Failed to encode");  
+      }
+
+      Serial.print("Sending packet Lat / Long: ");
+      Serial.print(lat);
+      Serial.println(lng);
+
+      // send packet
+  
+      LoRa.beginPacket();
+      LoRa.print((char *) buffer);
+      LoRa.endPacket();
+      
+    } else {
+      Serial.println("GPS has not yet initialized");  
+    }
+  }
+}