Packet #1271086

Database ID:	1271086
Mesh Packet ID:	`0x1150f4ee` Used for correlation across gateways
Timestamp:	2026-03-07 16:39:58 UTC
From Node:	Meshtastic a91b (a91b)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	CORE-X (9901)
Channel:	Bulgaria
RSSI:	-113 dBm
SNR:	-2.75 dBm
Hop Info:	1/2 hops Start: 2, Limit: 1
Relay Node:	`94` Last byte of the last hop that relayed this packet

Latitude:	42.683597°
Longitude:	23.363584°
Altitude:	577 m
Satellites:	12
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:	31 bytes
Gateway:	!aca95ba8
Channel:	Bulgaria
Payload Type:	POSITION_APP
Hop Count:	1 / 2

Privacy Summary

Exposure Level:
Broadcast

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

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

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!aca95ba8` Node ID format
`channel_id`	`Bulgaria`
`packet`	`MeshPacket` (31 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`2548476187` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`31` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-113.0` dBm Signal strength at gateway	int32
`rx_snr`	`-2.75` dB Signal quality at gateway	float
`rx_time`	Not set	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	Not set	enum
`delayed`	Not set	enum
`channel`	`37` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`148` 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: Bulgaria
✓ 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 (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!aca95ba8`
Position Precision:	15 bits (~729.0m accuracy)
Position precision meters:	`729.0`
Signal Metrics:	RSSI: -113.0 dBm SNR: -2.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	31 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 42.6835968, "longitude": 23.363584, "altitude": 577, "sats_in_view": 12, "precision_bits": 15 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 2548476187, "to": 4294967295, "channel": 37, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAcRkVAADtDRjBBCXXVKxpKAN4AIABAJgBDLgBDw==", "bitfield": 1 }, "id": 290518254, "rx_snr": -2.75, "hop_limit": 1, "rx_rssi": -113, "hop_start": 2, "relay_node": 148 }, "channel_id": "Bulgaria", "gateway_id": "!aca95ba8" }, "mesh_packet": { "from": 2548476187, "to": 4294967295, "channel": 37, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAcRkVAADtDRjBBCXXVKxpKAN4AIABAJgBDLgBDw==", "bitfield": 1, "parsed_payload": { "latitude_i": 426835968, "longitude_i": 233635840, "altitude": 577, "time": 1772901591, "location_source": "LOC_EXTERNAL", "ground_speed": 0, "ground_track": 0, "sats_in_view": 12, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 290518254, "rx_snr": -2.75, "hop_limit": 1, "rx_rssi": -113, "hop_start": 2, "relay_node": 148 } }

Raw Packet Data (31 bytes)

0d00007119150000ed0d18c10425d754ac692803780080010098010cb8010f

Hex Analysis:

Size:	31 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 #1271086 Success

Packet Information

Payload Data

Decoded Data: