Removed all other sensors and libraries besides needed for MVP

- removed globals for LEDS
- removed no longer needed setup lines.
- removed no longer needed loop lines.

Checked space of compiled program at 87% of program memory in current
state.

src/multi-tracker.cpp

@@ -24,7 +24,6 @@ RH_RF95 rf95(RFM9X_CS, RFM9X_INT);  // Radio instance.
 
 
 // Variables
-static int prevHeading = -1;         // Store previous heading to avoid frequent updates
 unsigned long lastUpdate = 0;        // Time tracking for updates
 const int updateInterval = 500;      // Update interval in milliseconds (500ms = 0.5s)
 
@@ -38,6 +37,7 @@ typedef struct MSG{
   double longitude;
 }MSG;
 
+const uint8_t MSG_Size = sizeof(MSG);
 
 enum result {
   Ok = 0,
@@ -91,7 +91,7 @@ uint8_t Radio_Setup(void) {
 
 uint8_t Radio_Configure(void) {
   // Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM
-  if(!rf95.setFrequency(RF95_FREQ)) {
+  if(!rf95.setFrequency(RF9X_FREQ)) {
 //Serial.println("Radio_Configure(): failed to set frequency");
     return Err;
   }
@@ -126,7 +126,7 @@ uint8_t Radio_CheckForMsg(MSG *msg) {
   //Now we wait for an packet.
   if (rf95.waitAvailableTimeout(1000)) {
     // Should be a reply message for us now
-    if (rf95.recv(buffer, sizeof(MSG))) {
+    if (rf95.recv(buffer, (uint8_t *) &MSG_Size)) {
 //Serial.print("Received reply: ");
 
       msg->id = (uint8_t) buffer[0];
@@ -190,15 +190,6 @@ void setup(void) {
 
   TFT_Init();
 
-  // Magnetometer Setup
-  if (!lis2mdl.begin()) {            // Initialize the magnetometer
-//Serial.println("Error: LIS2MDL not detected. Check your wiring!");
-    while (1) delay(10);             // Stop the program if the sensor isn't detected
-  }
-
-  // LED Ring Setup
-  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
-
   // GPS Setup
   gpsSerial.begin(GPS_BUADRATE); 
 
@@ -222,28 +213,7 @@ void setup(void) {
 }
 
 void loop() {
-  unsigned long currentTime = millis();  // Get the current time
-
-  // Magnetometer Readings
-  sensors_event_t event;               // Create an event to store magnetometer readings
-  lis2mdl.getEvent(&event);            // Get magnetic field data
-  int correctedX = event.magnetic.x + 18;  // Apply corrections to X-axis data
-  int correctedY = event.magnetic.y + 59;  // Apply corrections to Y-axis data
-
-  // Calculate the heading (bearing) from the magnetometer data
-
-  //NEED TO ADD TILT COMPENSATION
-
-  int heading = (atan2(correctedX, correctedY) * 180) / PI;  // Calculate heading in degrees
-  heading = heading - 90;             // Adjust to align with compass directions
-  if (heading < 0) heading += 360;    // Ensure the heading is within the 0-360 range
-
-  // Update LED ring and display every 500ms to avoid flickering
-  if (currentTime - lastUpdate > updateInterval) {
-    updateLEDs(heading);              // Update the LED ring based on the current heading
-    updateDisplay();                  // Placeholder: Update the central TFT display with GPS data
-    lastUpdate = currentTime;         // Reset the last update time
-  }
+  //unsigned long currentTime = millis();  // Get the current time
 
     //Handle the Radio data.
     sendGPSData();
@@ -262,7 +232,7 @@ void TFT_UpdateDistance(uint16_t meters) {
   tft.setTextWrap(true);
   tft.println(" Distance");
   tft.print("   ");
-  tft.print(distance);
+  tft.print(meters);
   tft.print("m");
 }
 
@@ -274,7 +244,7 @@ void TFT_UpdateDirection(uint16_t degrees) {
     tft.setCursor(0, 150);
     tft.setTextColor(ST77XX_WHITE);
     tft.setTextSize(3);
-    tft.print(meters);
+    tft.print(degrees);
     tft.println(" Degrees");
 }
 
@@ -312,6 +282,8 @@ uint8_t TFT_Reset() {
 //Serial.println("TFT_Reset()");
   tft.fillScreen(ST77XX_BLACK);     // Set the screen background to black
     //Can add default startup logo/screen here for later.
+
+    return Ok;
 }
 
 // Initalizes the Screen with default startup screen.
@@ -325,6 +297,8 @@ uint8_t TFT_Init(void) {
   TFT_UpdateDistance(0);
   TFT_UpdateDirection(0);
   TFT_UpdateBatteryState(100);
+
+  return Ok;
 }
 
 
@@ -401,5 +375,5 @@ void handleEdgeCases() {
   // - GPS signal is lost: Display a message on the screen or flash the LED ring
   // - Devices are too close: Display a warning if the GPS data is unreliable due to proximity
   // - LoRa communication is lost: Display a notification or error on the screen
-
 }
+