Packet #2977551

Database ID:	2977551
Mesh Packet ID:	`0x31ce5b1b` Used for correlation across gateways
Timestamp:	2025-08-18 16:27:35 UTC
From Node:	DJneo solar (42cf)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Rotterdam Network - Schiedam NG (RN-S)
Channel:	LongFast
RSSI:	-57 dBm
SNR:	7.25 dBm
Hop Info:	0/3 hops Start: 3, Limit: 3

Long Name:	DJneo solar
Short Name:	42cf
Node ID:	!ca6042cf
MAC Address:	6RTKYELP
Hardware:	HELTEC_MESH_NODE_T114

Raw Packet Analysis

Complete field breakdown and MQTT privacy/exposure analysis

Packet Structure

MQTT Packet Flow:
ServiceEnvelope (MQTT layer) → MeshPacket (Mesh layer) → Decoded Payload (Application data)

Total Size:	76 bytes
Gateway:	!433c1364
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 3

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!433c1364` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (76 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3395306191` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`76` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-57.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.25` dB Signal quality at gateway	float
`rx_time`	`1755527254` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	Not set	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1755527255.9552376` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Broadcast

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!433c1364`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -57.0 dBm SNR: 7.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	76 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ca6042cf", "long_name": "DJneo solar", "short_name": "42cf", "macaddr": "6RTKYELP", "hw_model": "HELTEC_MESH_NODE_T114" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433c1364", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3395306191, "to": 4294967295, "id": 835607323, "rx_time": 1755527254, "rx_snr": 7.25, "rx_rssi": -57, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 0, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216361363034326366120b444a6e656f20736f6c61721a04343263662206e914ca6042cf284538014220523e7cc8cd6f431d032f023a6d3ae8621503b8b4162c8aa181973eb699be4a73", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ca6042cf", "long_name": "DJneo solar", "short_name": "42cf", "macaddr": "6RTKYELP", "hw_model": "HELTEC_MESH_NODE_T114", "role": "CLIENT_MUTE", "public_key": "Uj58yM1vQx0DLwI6bTroYhUDuLQWLIqhgZc+tpm+SnM=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (76 bytes)

0a09216361363034326366120b444a6e656f20736f6c61721a04343263662206e914ca6042cf284538014220523e7cc8cd6f431d032f023a6d3ae8621503b8b4162c8aa181973eb699be4a73

Hex Analysis:

Size:	76 bytes
Format:	Protobuf (Protocol Buffers)
Encoding:	Binary with varint and length-delimited fields

This is the raw protobuf-encoded payload as received from MQTT. The structure follows the Meshtastic protobuf schema definitions.

Packet #2977551 Success

Packet Information

Payload Data

Decoded Data: