Packet #778923

Database ID:	778923
Mesh Packet ID:	`0x4e102ab9` Used for correlation across gateways
Timestamp:	2026-04-10 12:50:48 UTC
From Node:	DG0TM/M (0TM)
To Node:	Artr Base 2 (Art2)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	FabLab Lübeck (FLHL)
Channel:	LongFast
RSSI:	-96 dBm
SNR:	-2.0 dBm
Hop Info:	2/3 hops Start: 3, Limit: 1
Relay Node:	`4b` FLAP Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	DG0TM/M
Short Name:	0TM
Node ID:	!64f0d26b
MAC Address:	5mxk8NJr
Hardware:	TRACKER_T1000_E

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:	71 bytes
Gateway:	!69828534
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 3

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
+ 2 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!69828534` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (71 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1693504107` Source node ID	uint32
`to`	`2658531492` Target node ID	uint32
`decoded.portnum`	`NODEINFO_APP` NODEINFO_APP	enum
`decoded.payload_length`	`71` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-96.0` dBm Signal strength at gateway	int32
`rx_snr`	`-2.00` dB Signal quality at gateway	float
`rx_time`	`1775825447` 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`	`75` 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
⚠ Multi-hop path visible (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!69828534`
Signal Metrics:	RSSI: -96.0 dBm SNR: -2.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	71 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!64f0d26b", "long_name": "DG0TM/M", "short_name": "0TM", "macaddr": "5mxk8NJr", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1693504107, "to": 2658531492, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjRmMGQyNmISB0RHMFRNL00aAzBUTSIG5mxk8NJrKEdCIJ9LgO9obpObl/mGO+wQFrrNwIZ9WV35xv6fpzP8+YchSAA=", "want_response": true, "bitfield": 3 }, "id": 1309682361, "rx_time": 1775825447, "rx_snr": -2.0, "hop_limit": 1, "rx_rssi": -96, "hop_start": 3, "relay_node": 75, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!69828534" }, "mesh_packet": { "from": 1693504107, "to": 2658531492, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjRmMGQyNmISB0RHMFRNL00aAzBUTSIG5mxk8NJrKEdCIJ9LgO9obpObl/mGO+wQFrrNwIZ9WV35xv6fpzP8+YchSAA=", "want_response": true, "bitfield": 3, "parsed_payload": { "id": "!64f0d26b", "long_name": "DG0TM/M", "short_name": "0TM", "macaddr": "5mxk8NJr", "hw_model": "TRACKER_T1000_E", "public_key": "n0uA72huk5uX+YY77BAWus3Ahn1ZXfnG/p+nM/z5hyE=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } }, "id": 1309682361, "rx_time": 1775825447, "rx_snr": -2.0, "hop_limit": 1, "rx_rssi": -96, "hop_start": 3, "relay_node": 75, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (71 bytes)

0a092136346630643236621207444730544d2f4d1a0330544d2206e66c64f0d26b284742209f4b80ef686e939b97f9863bec1016bacdc0867d595df9c6fe9fa733fcf987214800

Hex Analysis:

Size:	71 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 #778923 Success

Packet Information

Payload Data

Decoded Data: