Packet #2617160

Database ID:	2617160
Mesh Packet ID:	`0x7f5c481b` Used for correlation across gateways
Timestamp:	2025-07-02 20:23:07 UTC
From Node:	ismatori T-DECK 📟 (GROF)
To Node:	!bc36d144 (d144)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	EA7-CA-015_Chiclana☀️ (575c)
Channel:	LongFast
RSSI:	-120 dBm
SNR:	-9.5 dBm
Hop Info:	2/5 hops Start: 5, Limit: 3

Long Name:	ismatori T-DECK 📟
Short Name:	GROF
Node ID:	!9e06dcd8
MAC Address:	8J6eBtzY
Hardware:	T_DECK

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:	87 bytes
Gateway:	!1570575c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 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
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!1570575c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (87 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2651249880` Source node ID	uint32
`to`	`3157709124` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`87` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-120.0` dBm Signal strength at gateway	int32
`rx_snr`	`-9.50` dB Signal quality at gateway	float
`rx_time`	`1751487785` 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`	`184` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1751487787.1053457` Unix timestamp	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:	`!1570575c`
Signal Metrics:	RSSI: -120.0 dBm SNR: -9.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	87 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!9e06dcd8", "long_name": "ismatori T-DECK 📟", "short_name": "GROF", "macaddr": "8J6eBtzY", "hw_model": "T_DECK" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!1570575c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2651249880, "to": 3157709124, "id": 2136754203, "rx_time": 1751487785, "rx_snr": -9.5, "rx_rssi": -120, "hop_limit": 3, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 184, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213965303664636438121469736d61746f726920542d4445434b20f09f939f1a0447524f462206f09e9e06dcd8283238014220b836cc4b1d70f387308bf9f930e4b98792101129e7fff3c2d1e2372336071a5a4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!9e06dcd8", "long_name": "ismatori T-DECK 📟", "short_name": "GROF", "macaddr": "8J6eBtzY", "hw_model": "T_DECK", "role": "CLIENT_MUTE", "public_key": "uDbMSx1w84cwi/n5MOS5h5IQESnn//PC0eI3IzYHGlo=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (87 bytes)

0a09213965303664636438121469736d61746f726920542d4445434b20f09f939f1a0447524f462206f09e9e06dcd8283238014220b836cc4b1d70f387308bf9f930e4b98792101129e7fff3c2d1e2372336071a5a4800

Hex Analysis:

Size:	87 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 #2617160 Success

Packet Information

Payload Data

Decoded Data: