Packet #2819752

Database ID:	2819752
Mesh Packet ID:	`0x95ac0176` Used for correlation across gateways
Timestamp:	2026-03-07 17:11:33 UTC
From Node:	CS9ABS TBeam-CL-868 (📟)
To Node:	SaojorgeN.Madeira-GW-868 (🌐)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	CS9ABS-CB-868 (🏕)
Channel:	LongFast
RSSI:	-7 dBm
SNR:	6.75 dBm
Hop Info:	0/4 hops Start: 4, Limit: 4

Latitude:	32.764711°
Longitude:	-16.920544°
Altitude:	1584 m
Satellites:	12

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:	34 bytes
Gateway:	!aa1fc5cd
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	Unknown / 4

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!aa1fc5cd` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (34 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1129749616` Source node ID	uint32
`to`	`1136082628` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`34` 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`	`-7.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.75` dB Signal quality at gateway	float
`rx_time`	`1772898937` 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`	`205` Next hop node ID	uint32
`relay_node`	`112` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1772903493.9449663` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

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

Exposure Level: Direct Message

Privacy Features:

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

Exposure Risks:

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

MQTT-Specific Fields

Gateway ID:	`!aa1fc5cd`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -7.0 dBm SNR: 6.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	34 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 32.7647107, "longitude": -16.9205437, "altitude": 1584, "sats_in_view": 12, "precision_bits": null }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!aa1fc5cd", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1129749616, "to": 1136082628, "id": 2511077750, "rx_time": 1772898937, "rx_snr": 6.75, "rx_rssi": -7, "hop_limit": 4, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 205, "relay_node": 112, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d837f8713154321eaf518b00c25764aac6928033d764aac6978038001c90198010c", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 327647107, "longitude_i": -169205437, "altitude": 1584, "time": 1772898934, "location_source": "LOC_EXTERNAL", "timestamp": 1772898934, "ground_speed": 3, "ground_track": 201, "sats_in_view": 12, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (34 bytes)

0d837f8713154321eaf518b00c25764aac6928033d764aac6978038001c90198010c

Hex Analysis:

Size:	34 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 #2819752 Success

Packet Information

Payload Data

Decoded Data: