Macro to trace log all MeshPackets as JSON (#4336)

* Macro to trace log all MeshPackets as JSON

* Comment

* Add trace logging to file for native target

* bytes to hex

* Add time_ms

---------

Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>

src/serialization/MeshPacketSerializer.h

@@ -1,8 +1,23 @@
 #include <meshtastic/mesh.pb.h>
 #include <string>
 
+static const char hexChars[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+
 class MeshPacketSerializer
 {
   public:
-    static std::string JsonSerialize(meshtastic_MeshPacket *mp, bool shouldLog = true);
+    static std::string JsonSerialize(const meshtastic_MeshPacket *mp, bool shouldLog = true);
+    static std::string JsonSerializeEncrypted(const meshtastic_MeshPacket *mp);
+
+  private:
+    static std::string bytesToHex(const uint8_t *bytes, int len)
+    {
+        std::string result = "";
+        for (int i = 0; i < len; ++i) {
+            char const byte = bytes[i];
+            result += hexChars[(byte & 0xF0) >> 4];
+            result += hexChars[(byte & 0x0F) >> 0];
+        }
+        return result;
+    }
 };