Add full Companion OTA source builds

src/helpers/ArduinoSerialInterface.h

@@ -7,29 +7,37 @@ class ArduinoSerialInterface : public BaseSerialInterface {
   bool _isEnabled;
   bool _passthroughMode;
   bool _controlSequenceReceived;
+  bool _secondaryControlSequenceReceived;
   uint8_t _state;
   size_t _controlSequencePos;
+  size_t _secondaryControlSequencePos;
   uint16_t _frame_len;
   uint16_t rx_len;
   Stream* _serial;
   const char* _controlSequence;
+  const char* _secondaryControlSequence;
   uint8_t rx_buf[MAX_FRAME_SIZE];
 
-  bool checkControlSequence(uint8_t c);
+  bool checkControlSequence(uint8_t c, const char* sequence,
+                            size_t& position, bool& received);
   void resetReceiveState();
 
 public:
   ArduinoSerialInterface()
       : _isEnabled(false), _passthroughMode(false),
-        _controlSequenceReceived(false), _state(0), _controlSequencePos(0),
+        _controlSequenceReceived(false), _secondaryControlSequenceReceived(false),
+        _state(0), _controlSequencePos(0), _secondaryControlSequencePos(0),
         _frame_len(0), rx_len(0), _serial(nullptr),
-        _controlSequence(nullptr) {}
+        _controlSequence(nullptr), _secondaryControlSequence(nullptr) {}
 
-  void begin(Stream& serial, const char* controlSequence = nullptr) {
+  void begin(Stream& serial, const char* controlSequence = nullptr,
+             const char* secondaryControlSequence = nullptr) {
     _serial = &serial;
     _controlSequence = controlSequence;
+    _secondaryControlSequence = secondaryControlSequence;
     _passthroughMode = false;
     _controlSequenceReceived = false;
+    _secondaryControlSequenceReceived = false;
     resetReceiveState();
   #ifdef RAK_4631
     pinMode(WB_IO2, OUTPUT);
@@ -44,6 +52,7 @@ public:
   // Returns true once for each complete control sequence received while the
   // binary frame parser was idle.
   bool takeControlSequence();
+  bool takeSecondaryControlSequence();
 
   // BaseSerialInterface methods
   void enable() override;