prepare for sending messages

src/keyer.cpp

@@ -51,6 +51,11 @@ void Keyer::run()
 {
     auto timestamp = get_absolute_time();
 
+    // If there is something to send …
+    if (!m_messageQueue.empty()) {
+        // TODO
+    }
+
     // If we are in Straight key mode …
     if (m_mode == Mode::Straight) {
         if (left_paddle_pressed()) {

src/keyer.h

@@ -1,5 +1,8 @@
 #pragma once
 
+#include <queue>
+#include <string>
+
 #include "settings.h"
 #include "sidetone.h"
 
@@ -40,4 +43,6 @@ class Keyer final
     bool m_currentlyKeying {false};
     bool m_currentlyPausing {false};
     bool m_keyNextIambicB {false};
+
+    std::queue<std::string> m_messageQueue;
 };