Packet #723954

Database ID:	723954
Mesh Packet ID:	`0x4ffc8bfa` Used for correlation across gateways
Timestamp:	2026-03-19 08:51:42 UTC
From Node:	!756f8eac (8eac)
To Node:	!f9b00f9c (0f9c)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	DE-SH-24113-01 / Meshtastic-Kiel.de (a66c)
Channel:	LongFast
RSSI:	-102 dBm
SNR:	-7.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4
Relay Node:	`d0` Last byte of the last hop that relayed this packet

Latitude:	53.932851°
Longitude:	9.492890°
Altitude:	16 m
Satellites:	29
Precision:	16 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:	35 bytes
Gateway:	!b29fa66c
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	1 / 5

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 1 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 3 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!b29fa66c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (35 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1970245292` Source node ID	uint32
`to`	`4189065116` Target node ID	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`35` 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`	`-102.0` dBm Signal strength at gateway	int32
`rx_snr`	`-7.75` dB Signal quality at gateway	float
`rx_time`	`1773910301` 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`	`208` 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: Direct Message

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
✓ Gateway node ID tracked

Exposure Risks:

⚠ 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:	`!b29fa66c`
Position Precision:	16 bits (~364.0m accuracy)
Position precision meters:	`364.0`
Signal Metrics:	RSSI: -102.0 dBm SNR: -7.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	35 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 53.9328512, "longitude": 9.4928896, "altitude": 16, "sats_in_view": 29, "precision_bits": 16 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1970245292, "to": 4189065116, "decoded": { "portnum": "POSITION_APP", "payload": "DQCAJSAVAICoBRgQJRi5u2koAlhGeACAAZC6tgyYAR24ARA=", "request_id": 2063187185, "bitfield": 1 }, "id": 1341950970, "rx_time": 1773910301, "rx_snr": -7.75, "hop_limit": 4, "rx_rssi": -102, "hop_start": 5, "relay_node": 208, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!b29fa66c" }, "mesh_packet": { "from": 1970245292, "to": 4189065116, "decoded": { "portnum": "POSITION_APP", "payload": "DQCAJSAVAICoBRgQJRi5u2koAlhGeACAAZC6tgyYAR24ARA=", "request_id": 2063187185, "bitfield": 1, "parsed_payload": { "latitude_i": 539328512, "longitude_i": 94928896, "altitude": 16, "time": 1773910296, "location_source": "LOC_INTERNAL", "PDOP": 70, "ground_speed": 0, "ground_track": 26058000, "sats_in_view": 29, "precision_bits": 16, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 1341950970, "rx_time": 1773910301, "rx_snr": -7.75, "hop_limit": 4, "rx_rssi": -102, "hop_start": 5, "relay_node": 208, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (35 bytes)

0d00802520150080a80518102518b9bb69280258467800800190bab60c98011db80110

Hex Analysis:

Size:	35 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 #723954 Success

Packet Information

Payload Data

Decoded Data: