Packet #3981887

Database ID:	3981887
Mesh Packet ID:	`0xa8b92cce` Used for correlation across gateways
Timestamp:	2025-07-17 16:42:36 UTC
From Node:	EB7BXB (7BXB)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	RDRA_FA-GW-868 (FABR)
Channel:	LongFast
RSSI:	-119 dBm
SNR:	-9.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	EB7BXB
Short Name:	7BXB
Node ID:	!db29208c
MAC Address:	EFHbKSCM
Hardware:	HELTEC_V3

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:	71 bytes
Gateway:	!db2fae44
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 5

Privacy Summary

Exposure Level:
Broadcast

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

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!db2fae44` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (71 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3676905612` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`71` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-119.0` dBm Signal strength at gateway	int32
`rx_snr`	`-9.75` dB Signal quality at gateway	float
`rx_time`	`1752770556` 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`	`136` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752770556.6915514` 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

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!db2fae44`
Signal Metrics:	RSSI: -119.0 dBm SNR: -9.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	71 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!db29208c", "long_name": "EB7BXB", "short_name": "7BXB", "macaddr": "EFHbKSCM", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!db2fae44", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3676905612, "to": 4294967295, "id": 2830707918, "rx_time": 1752770556, "rx_snr": -9.75, "rx_rssi": -119, "hop_limit": 4, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 136, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921646232393230386312064542374258421a043742584222061051db29208c282b422041b5602b7ced22492e25c74423588391e0dfe76f3e42ab9ef7e0d7b5dead0b6f4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!db29208c", "long_name": "EB7BXB", "short_name": "7BXB", "macaddr": "EFHbKSCM", "hw_model": "HELTEC_V3", "public_key": "QbVgK3ztIkkuJcdEI1iDkeDf528+Qque9+DXtd6tC28=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (71 bytes)

0a0921646232393230386312064542374258421a043742584222061051db29208c282b422041b5602b7ced22492e25c74423588391e0dfe76f3e42ab9ef7e0d7b5dead0b6f4800

Hex Analysis:

Size:	71 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 #3981887 Success

Packet Information

Payload Data

Decoded Data: