diff --git a/src/Packet.cpp b/src/Packet.cpp
index 934020b3..d036f3a0 100644
--- a/src/Packet.cpp
+++ b/src/Packet.cpp
@@ -56,8 +56,9 @@ uint8_t Packet::writeTo(uint8_t dest[]) const {
     memcpy(&dest[i], &transport_codes[0], 2); i += 2;
     memcpy(&dest[i], &transport_codes[1], 2); i += 2;
   }
-  dest[i++] = path_len;
-  memcpy(&dest[i], path, path_len); i += path_len;
+  dest[i++] = (uint8_t)path_len;
+  size_t path_byte_len = getPathByteLen();
+  memcpy(&dest[i], path, path_byte_len); i += path_byte_len;
   memcpy(&dest[i], payload, payload_len); i += payload_len;
   return i;
 }
@@ -71,9 +72,12 @@ bool Packet::readFrom(const uint8_t src[], uint8_t len) {
   } else {
     transport_codes[0] = transport_codes[1] = 0;
   }
-  path_len = src[i++];
-  if (path_len > sizeof(path)) return false;   // bad encoding
-  memcpy(path, &src[i], path_len); i += path_len;
+  uint8_t pl = src[i++];
+  path_len = pl;
+  if ((pl >> 6) == 3) return false;   // reserved path mode
+  uint8_t path_byte_len = (pl & 63) * ((pl >> 6) + 1);
+  if (path_byte_len > sizeof(path) || i + path_byte_len > len) return false;   // bad encoding
+  memcpy(path, &src[i], path_byte_len); i += path_byte_len;
   if (i >= len) return false;   // bad encoding
   payload_len = len - i;
   if (payload_len > sizeof(payload)) return false;  // bad encoding
diff --git a/src/helpers/MQTTMessageBuilder.cpp b/src/helpers/MQTTMessageBuilder.cpp
index f65fe4d0..aa8057d9 100644
--- a/src/helpers/MQTTMessageBuilder.cpp
+++ b/src/helpers/MQTTMessageBuilder.cpp
@@ -211,18 +211,18 @@ int MQTTMessageBuilder::buildPacketJSON(
   packet->calculatePacketHash(packet_hash);
   bytesToHex(packet_hash, MAX_HASH_SIZE, hash_str, sizeof(hash_str));
   
-  // Build path string for direct packets
+  // Build path string for direct packets (multibyte-path: show hash count, hash size, byte length)
   char path_str[128] = "";
   if (packet->isRouteDirect() && packet->path_len > 0) {
-    // Simplified path representation
-    snprintf(path_str, sizeof(path_str), "path_len_%d", packet->path_len);
+    snprintf(path_str, sizeof(path_str), "path_%dx%d_%db",
+             (int)packet->getPathHashCount(), (int)packet->getPathHashSize(), (int)packet->getPathByteLen());
   }
   
   return buildPacketMessage(
     origin, origin_id, timestamp,
     is_tx ? "tx" : "rx",
     time_str, date_str,
-    packet->path_len + packet->payload_len + 2,
+    packet->getRawLength(),
     packet_type, route_str,
     packet->payload_len,
     raw_hex,
@@ -293,11 +293,11 @@ int MQTTMessageBuilder::buildPacketJSONFromRaw(
   packet->calculatePacketHash(packet_hash);
   bytesToHex(packet_hash, MAX_HASH_SIZE, hash_str, sizeof(hash_str));
   
-  // Build path string for direct packets
+  // Build path string for direct packets (multibyte-path: show hash count, hash size, byte length)
   char path_str[128] = "";
   if (packet->isRouteDirect() && packet->path_len > 0) {
-    // Simplified path representation
-    snprintf(path_str, sizeof(path_str), "path_len_%d", packet->path_len);
+    snprintf(path_str, sizeof(path_str), "path_%dx%d_%db",
+             (int)packet->getPathHashCount(), (int)packet->getPathHashSize(), (int)packet->getPathByteLen());
   }
   
   return buildPacketMessage(