Packet #666453

Database ID:	666453
Mesh Packet ID:	`0x102f51bc` Used for correlation across gateways
Timestamp:	2026-05-15 20:27:45 UTC
From Node:	!48cd977b (977b)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Gael home (Gael)
Channel:	General
RSSI:	-123 dBm
SNR:	-15.25 dBm
Hop Info:	1/4 hops Start: 4, Limit: 3
Relay Node:	`19` Last byte of the last hop that relayed this packet

Latitude:	39.935580°
Longitude:	-8.138046°
Altitude:	385 m
Satellites:	13
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:	33 bytes
Gateway:	!fa88c205
Channel:	General
Payload Type:	POSITION_APP
Hop Count:	1 / 4

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: General
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 3 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!fa88c205` Node ID format
`channel_id`	`General`
`packet`	`MeshPacket` (33 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1221433211` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`33` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-123.0` dBm Signal strength at gateway	int32
`rx_snr`	`-15.25` dB Signal quality at gateway	float
`rx_time`	`1778876855` 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`	`25` 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)
✓ Custom channel: General
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Full GPS precision shared
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!fa88c205`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -123.0 dBm SNR: -15.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	33 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 39.9355795, "longitude": -8.1380455, "altitude": 385, "sats_in_view": 13, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1221433211, "to": 4294967295, "decoded": { "portnum": "POSITION_APP", "payload": "DZOvzRcVmTsm+xiBAyW+gQdqKAJYcHgAgAEAmAENuAEg", "bitfield": 1 }, "id": 271536572, "rx_time": 1778876855, "rx_snr": -15.25, "hop_limit": 3, "rx_rssi": -123, "hop_start": 4, "relay_node": 25, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "General", "gateway_id": "!fa88c205" }, "mesh_packet": { "from": 1221433211, "to": 4294967295, "decoded": { "portnum": "POSITION_APP", "payload": "DZOvzRcVmTsm+xiBAyW+gQdqKAJYcHgAgAEAmAENuAEg", "bitfield": 1, "parsed_payload": { "latitude_i": 399355795, "longitude_i": -81380455, "altitude": 385, "time": 1778876862, "location_source": "LOC_INTERNAL", "PDOP": 112, "ground_speed": 0, "ground_track": 0, "sats_in_view": 13, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 271536572, "rx_time": 1778876855, "rx_snr": -15.25, "hop_limit": 3, "rx_rssi": -123, "hop_start": 4, "relay_node": 25, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (33 bytes)

0d93afcd1715993b26fb18810325be81076a28025870780080010098010db80120

Hex Analysis:

Size:	33 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 #666453 Success

Packet Information

Payload Data

Decoded Data: