experimental mqtt client supporting large packets

lib/async-mqtt-client/src/AsyncMqttClient/Packets/Out/PubAck.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "OutPacket.hpp"
+#include "../../Flags.hpp"
+#include "../../Helpers.hpp"
+#include "../../Storage.hpp"
+
+namespace AsyncMqttClientInternals {
+class PubAckOutPacket : public OutPacket {
+ public:
+  explicit PubAckOutPacket(PendingAck pendingAck);
+  const uint8_t* data(size_t index = 0) const;
+  size_t size() const;
+
+ private:
+  uint8_t _data[4];
+};
+}  // namespace AsyncMqttClientInternals