Packet #126108

Database ID:	126108
Mesh Packet ID:	`0xaa19d7e7` Used for correlation across gateways
Timestamp:	2026-04-10 12:42:22 UTC
From Node:	Meshtastic SUL (S.B)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic SUL (S.B)
Channel:	LongFast
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/4 hops Start: 4, Limit: 4
Relay Node:	`dc` S.B Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	Meshtastic SUL
Short Name:	S.B
Node ID:	!699b3adc
MAC Address:	kHBpmzrc
Hardware:	HELTEC_V4

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:	80 bytes
Gateway:	!699b3adc
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	0 / 4

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
+ 1 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!699b3adc` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1771780828` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`NODEINFO_APP` NODEINFO_APP	enum
`decoded.payload_length`	`80` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1775824941` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`BACKGROUND` Packet priority level	enum
`delayed`	Not set	enum
`channel`	`8` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`220` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	Not set	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

MQTT-Specific Fields

Gateway ID:	`!699b3adc`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	80 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!699b3adc", "long_name": "Meshtastic SUL", "short_name": "S.B", "macaddr": "kHBpmzrc", "hw_model": "HELTEC_V4" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1771780828, "to": 4294967295, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjk5YjNhZGMSDk1lc2h0YXN0aWMgU1VMGgNTLkIiBpBwaZs63ChuOAFCIJN+u9B1bNHvuRMzSQySztLmV9u49QH59uDEtS9jaqNPSAA=", "bitfield": 1 }, "id": 2853820391, "rx_time": 1775824941, "hop_limit": 4, "priority": "BACKGROUND", "hop_start": 4, "relay_node": 220 }, "channel_id": "LongFast", "gateway_id": "!699b3adc" }, "mesh_packet": { "from": 1771780828, "to": 4294967295, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjk5YjNhZGMSDk1lc2h0YXN0aWMgU1VMGgNTLkIiBpBwaZs63ChuOAFCIJN+u9B1bNHvuRMzSQySztLmV9u49QH59uDEtS9jaqNPSAA=", "bitfield": 1, "parsed_payload": { "id": "!699b3adc", "long_name": "Meshtastic SUL", "short_name": "S.B", "macaddr": "kHBpmzrc", "hw_model": "HELTEC_V4", "role": "CLIENT_MUTE", "public_key": "k3670HVs0e+5EzNJDJLO0uZX27j1Afn24MS1L2Nqo08=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } }, "id": 2853820391, "rx_time": 1775824941, "hop_limit": 4, "priority": "BACKGROUND", "hop_start": 4, "relay_node": 220 } }

Raw Packet Data (80 bytes)

0a09213639396233616463120e4d6573687461737469632053554c1a03532e4222069070699b3adc286e38014220937ebbd0756cd1efb91333490c92ced2e657dbb8f501f9f6e0c4b52f636aa34f4800

Hex Analysis:

Size:	80 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 #126108 Success

Packet Information

Payload Data

Decoded Data: