Packet #3005060

Database ID:	3005060
Mesh Packet ID:	`0xb7671dbc` Used for correlation across gateways
Timestamp:	2026-03-22 20:53:10 UTC
From Node:	KA1BMF-L1 (BMF1)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	KA1BMF-H3 (BMF5)
Channel:	LongFast
RSSI:	Unknown
SNR:	6.0 dBm
Hop Info:	0/5 hops Start: 5, Limit: 5
Relay Node:	`04` BMF1 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	42.349363°
Longitude:	-71.080346°
Altitude:	-5 m
Satellites:	13
Precision:	14 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:	39 bytes
Gateway:	!b2a7c1dc
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	0 / 5

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 2 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!b2a7c1dc` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (39 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`3046734084` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`39` bytes	size
`hop_limit`	`5` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	`6.00` dB Signal quality at gateway	float
`rx_time`	`1774212788` 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`	`8` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`4` 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
✓ Reduced position precision: ~1500.0m accuracy
✓ 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
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b2a7c1dc`
Position Precision:	14 bits (~1500.0m accuracy)
Position precision meters:	`1500.0`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	SNR: 6.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	39 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 42.3493632, "longitude": -71.0803456, "altitude": -5, "sats_in_view": 13, "precision_bits": 14 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 3046734084, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAPhkVAACi1Rj7//////////8BJctWwGkoAj2bVsBpmAENuAEO", "bitfield": 1 }, "id": 3076988348, "rx_time": 1774212788, "rx_snr": 6.0, "hop_limit": 5, "hop_start": 5, "relay_node": 4, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!b2a7c1dc" }, "mesh_packet": { "from": 3046734084, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAPhkVAACi1Rj7//////////8BJctWwGkoAj2bVsBpmAENuAEO", "bitfield": 1, "parsed_payload": { "latitude_i": 423493632, "longitude_i": -710803456, "altitude": -5, "time": 1774212811, "location_source": "LOC_INTERNAL", "timestamp": 1774212763, "sats_in_view": 13, "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 3076988348, "rx_time": 1774212788, "rx_snr": 6.0, "hop_limit": 5, "hop_start": 5, "relay_node": 4, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (39 bytes)

0d00003e19150000a2d518fbffffffffffffffff0125cb56c06928023d9b56c06998010db8010e

Hex Analysis:

Size:	39 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 #3005060 Success

Packet Information

Payload Data

Decoded Data: