Packet #108956

Database ID:	108956
Mesh Packet ID:	`0x704b0fd1` Used for correlation across gateways
Timestamp:	2025-11-04 10:28:55 UTC
From Node:	VinnyPuh 2 (vp2)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Ph-3558 (testing) (b-01)
Channel:	LongFast
RSSI:	-81 dBm
SNR:	11.75 dBm
Hop Info:	-1/0 hops Start: 0, Limit: 1

Latitude:	51.576525°
Longitude:	46.073779°
Altitude:	123 m

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:	17 bytes
Gateway:	!12b03558
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	-1 / Unknown

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`	`!12b03558` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (17 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`621110652` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`17` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	Not set	uint32
`hops_taken`	`-1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-81.0` dBm Signal strength at gateway	int32
`rx_snr`	`11.75` dB Signal quality at gateway	float
`rx_time`	`1762237734` 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`	`1762237735.3058522` 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:	`!12b03558`
Signal Metrics:	RSSI: -81.0 dBm SNR: 11.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	17 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 51.5765252, "longitude": 46.0737792, "altitude": 123, "sats_in_view": null, "precision_bits": null }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!12b03558", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 621110652, "to": 4294967295, "id": 1883967441, "rx_time": 1762237734, "rx_snr": 11.75, "rx_rssi": -81, "hop_limit": 1, "hop_start": 0, "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": 3, "payload": "0d04f4bd1e15004d761b187b253d014568", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 515765252, "longitude_i": 460737792, "altitude": 123, "time": 1749352765, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (17 bytes)

0d04f4bd1e15004d761b187b253d014568

Hex Analysis:

Size:	17 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 #108956 Success

Packet Information

Payload Data

Decoded Data: