Packet #912497

Database ID:	912497
Mesh Packet ID:	`0xb8f48c56` Used for correlation across gateways
Timestamp:	2026-07-28 00:47:05 UTC
From Node:	MRC adfe (MRC)
To Node:	BBS Node (BBS)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Hazelwood Base (HWBS)
Channel:	LongFast
RSSI:	-128 dBm
SNR:	-21.0 dBm
Hop Info:	0/3 hops Start: 3, Limit: 3
Relay Node:	`fe` MRC Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	39.990067°
Longitude:	-75.274650°
Altitude:	100 m
Precision:	14 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:	22 bytes
Gateway:	!4358edf4
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	0 / 3

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!4358edf4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (22 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`2074717694` Source node ID	uint32
`to`	`2988158324` Target node ID	uint32
`decoded.portnum`	`POSITION_APP` POSITION_APP	enum
`decoded.payload_length`	`22` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-128.0` dBm Signal strength at gateway	int32
`rx_snr`	`-21.00` 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`	`8` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	`196` Next hop node ID	uint32
`relay_node`	`254` 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
✓ Reduced position precision: ~1500.0m accuracy
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!4358edf4`
Position Precision:	14 bits (~1500.0m accuracy)
Position precision meters:	`1500.0`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -128.0 dBm SNR: -21.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	22 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 39.9900672, "longitude": -75.2746496, "altitude": 100, "sats_in_view": null, "precision_bits": 14 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 2074717694, "to": 2988158324, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAA1hcVAAAi0xhkJRj8Z2ooAbgBDg==", "request_id": 2071305573, "bitfield": 1 }, "id": 3103034454, "rx_snr": -21.0, "hop_limit": 3, "rx_rssi": -128, "hop_start": 3, "next_hop": 196, "relay_node": 254, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!4358edf4" }, "mesh_packet": { "from": 2074717694, "to": 2988158324, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAA1hcVAAAi0xhkJRj8Z2ooAbgBDg==", "request_id": 2071305573, "bitfield": 1, "parsed_payload": { "latitude_i": 399900672, "longitude_i": -752746496, "altitude": 100, "time": 1785199640, "location_source": "LOC_MANUAL", "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 3103034454, "rx_snr": -21.0, "hop_limit": 3, "rx_rssi": -128, "hop_start": 3, "next_hop": 196, "relay_node": 254, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (22 bytes)

0d0000d61715000022d318642518fc676a2801b8010e

Hex Analysis:

Size:	22 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 #912497 Success

Packet Information

Payload Data

Decoded Data: