Packet #763953

Database ID:	763953
Mesh Packet ID:	`0xcd645831` Used for correlation across gateways
Timestamp:	2026-05-15 18:45:09 UTC
From Node:	!ae766207 (6207)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Mesh+TN01 (TN01)
Channel:	LongFast
RSSI:	-81 dBm
SNR:	5.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4
Relay Node:	`a2` Last byte of the last hop that relayed this packet

Latitude:	39.725051°
Longitude:	-84.613248°
Altitude:	316 m
Satellites:	5
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:	31 bytes
Gateway:	!a7f7aab2
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	1 / 5

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
+ 4 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!a7f7aab2` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (31 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`2926993927` 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`	`4` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-81.0` dBm Signal strength at gateway	int32
`rx_snr`	`5.75` dB Signal quality at gateway	float
`rx_time`	`1778870709` 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`	`162` 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

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ 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:	`!a7f7aab2`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -81.0 dBm SNR: 5.75 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": 39.7250506, "longitude": -84.6132481, "altitude": 316, "sats_in_view": 5, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 2926993927, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DcqPrRcV/wqRzRi8AiWjaQdqKAJ4AYABAJgBBbgBIA==", "bitfield": 1 }, "id": 3445905457, "rx_time": 1778870709, "rx_snr": 5.75, "hop_limit": 4, "rx_rssi": -81, "hop_start": 5, "relay_node": 162, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!a7f7aab2" }, "mesh_packet": { "from": 2926993927, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DcqPrRcV/wqRzRi8AiWjaQdqKAJ4AYABAJgBBbgBIA==", "bitfield": 1, "parsed_payload": { "latitude_i": 397250506, "longitude_i": -846132481, "altitude": 316, "time": 1778870691, "location_source": "LOC_INTERNAL", "ground_speed": 1, "ground_track": 0, "sats_in_view": 5, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 3445905457, "rx_time": 1778870709, "rx_snr": 5.75, "hop_limit": 4, "rx_rssi": -81, "hop_start": 5, "relay_node": 162, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (31 bytes)

0dca8fad1715ff0a91cd18bc0225a369076a28027801800100980105b80120

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 #763953 Success

Packet Information

Payload Data

Decoded Data: