Packet #55822

Database ID:	55822
Mesh Packet ID:	`0x737758f2` Used for correlation across gateways
Timestamp:	2025-09-19 13:15:13 UTC
From Node:	KMesh.us 🌄 Denning (Kden)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	PartyWagon \| nyme.sh (PDD8)
Channel:	LongFast
RSSI:	-104 dBm
SNR:	3.75 dBm
Hop Info:	2/7 hops Start: 7, Limit: 5
Relay Node:	`7e` Last byte of the last hop that relayed this packet

Latitude:	41.931153°
Longitude:	-74.470141°
Altitude:	794 m
Precision:	32 bits

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:	25 bytes
Gateway:	!0c703019
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	2 / 7

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
+ 4 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!0c703019` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (25 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`153829382` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`25` bytes	size
`hop_limit`	`5` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-104.0` dBm Signal strength at gateway	int32
`rx_snr`	`3.75` dB Signal quality at gateway	float
`rx_time`	`1758288012` 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`	`126` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1758287713.403142` 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
⚠ Full GPS precision shared
⚠ Multi-hop path visible (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!0c703019`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -104.0 dBm SNR: 3.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	25 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 41.9311531, "longitude": -74.4701408, "altitude": 794, "sats_in_view": null, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!0c703019", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 153829382, "to": 4294967295, "id": 1937201394, "rx_time": 1758288012, "rx_snr": 3.75, "rx_rssi": -104, "hop_limit": 5, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 126, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0dab2ffe181520c29cd3189a06258058cd6828015000b80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 419311531, "longitude_i": -744701408, "altitude": 794, "time": 1758288000, "location_source": "LOC_MANUAL", "altitude_geoidal_separation": 0, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (25 bytes)

0dab2ffe181520c29cd3189a06258058cd6828015000b80120

Hex Analysis:

Size:	25 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 #55822 Success

Packet Information

Payload Data

Decoded Data: