Packet #546072

Database ID:	546072
Mesh Packet ID:	`0xd7176232` Used for correlation across gateways
Timestamp:	2026-03-14 12:42:00 UTC
From Node:	Meshtastic 053c (053c)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Zaovrazhnoe (mnlt)
Channel:	chat.cap.ru
RSSI:	-73 dBm
SNR:	7.25 dBm
Hop Info:	7/7 hops Start: 7, Limit: 0
Relay Node:	`3c` Last byte of the last hop that relayed this packet

Latitude:	56.118477°
Longitude:	47.297331°
Altitude:	333 m
Satellites:	22
Precision:	15 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:	26 bytes
Gateway:	!a6964168
Channel:	chat.cap.ru
Payload Type:	POSITION_APP
Hop Count:	7 / 7

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: chat.cap.ru
+ 2 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!a6964168` Node ID format
`channel_id`	`chat.cap.ru`
`packet`	`MeshPacket` (26 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1293223228` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`26` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`7` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-73.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.25` dB Signal quality at gateway	float
`rx_time`	`1773492119` 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`	`105` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`60` 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: chat.cap.ru
✓ Gateway node ID tracked
✓ Reduced position precision: ~729.0m accuracy

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (7 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!a6964168`
Position Precision:	15 bits (~729.0m accuracy)
Position precision meters:	`729.0`
Signal Metrics:	RSSI: -73.0 dBm SNR: 7.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	26 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 56.1184768, "longitude": 47.2973312, "altitude": 333, "sats_in_view": 22, "precision_bits": 15 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1293223228, "to": 4294967295, "channel": 105, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAcyEVAAAxHBjNAiXeV7VpKAKYARa4AQ8=", "bitfield": 1 }, "id": 3608633906, "rx_time": 1773492119, "rx_snr": 7.25, "rx_rssi": -73, "hop_start": 7, "relay_node": 60, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "chat.cap.ru", "gateway_id": "!a6964168" }, "mesh_packet": { "from": 1293223228, "to": 4294967295, "channel": 105, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAcyEVAAAxHBjNAiXeV7VpKAKYARa4AQ8=", "bitfield": 1, "parsed_payload": { "latitude_i": 561184768, "longitude_i": 472973312, "altitude": 333, "time": 1773492190, "location_source": "LOC_INTERNAL", "sats_in_view": 22, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 3608633906, "rx_time": 1773492119, "rx_snr": 7.25, "rx_rssi": -73, "hop_start": 7, "relay_node": 60, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (26 bytes)

0d00007321150000311c18cd0225de57b5692802980116b8010f

Hex Analysis:

Size:	26 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 #546072 Success

Packet Information

Payload Data

Decoded Data: