Packet #200702

Packet Information

Database ID:	200702
Mesh Packet ID:	`0x04d9b556` Used for correlation across gateways
Timestamp:	2026-06-27 22:51:50 Саратов/Балаково (UTC+4)
From Node:	Root (root)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	chem (721c)
Channel:	LongFast
RSSI:	-125 dBm
SNR:	-18.25 dBm
Hop Info:	7/7 hops Start: 7, Limit: 0

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 180 bytes

Decoded: Yes

Text Content:

У нас при трассировки есть какие-то скрытые ноды, которых нет в общем списке. Что это за устройства?

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:	180 bytes
Gateway:	!9e78721c
Channel:	LongFast
Payload Type:	TEXT_MESSAGE_APP
Hop Count:	7 / 7

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
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!9e78721c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (180 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1770350060` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`180` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`7` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-125.0` dBm Signal strength at gateway	int32
`rx_snr`	`-18.25` dB Signal quality at gateway	float
`rx_time`	`1782586309` 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`	`2` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`236` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`2026-06-27 21:51:50.028821+03:00` Unix timestamp	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
⚠ Multi-hop path visible (7 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!9e78721c`
Signal Metrics:	RSSI: -125.0 dBm SNR: -18.25 dB

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!9e78721c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1770350060, "to": 4294967295, "id": 81376598, "rx_time": 1782586309, "rx_snr": -18.25, "rx_rssi": -125, "hop_limit": 0, "hop_start": 7, "via_mqtt": false, "want_ack": false, "priority": 0, "delayed": 0, "channel_index": 2, "pki_encrypted": false, "next_hop": 0, "relay_node": 236, "tx_after": 0, "decoded": { "portnum": 1, "payload": "d0a320d0bdd0b0d18120d0bfd180d0b820d182d180d0b0d181d181d0b8d180d0bed0b2d0bad0b820d0b5d181d182d18c20d0bad0b0d0bad0b8d0b52dd182d0be20d181d0bad180d18bd182d18bd0b520d0bdd0bed0b4d18b2c20d0bad0bed182d0bed180d18bd18520d0bdd0b5d18220d0b220d0bed0b1d189d0b5d0bc20d181d0bfd0b8d181d0bad0b52e20d0a7d182d0be20d18dd182d0be20d0b7d0b020d183d181d182d180d0bed0b9d181d182d0b2d0b03f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "text": "У нас при трассировки есть какие-то скрытые ноды, которых нет в общем списке. Что это за устройства?", "type": "text_message", "portnum": "TEXT_MESSAGE_APP" } } } }

Raw Packet Data (180 bytes)

d0a320d0bdd0b0d18120d0bfd180d0b820d182d180d0b0d181d181d0b8d180d0bed0b2d0bad0b820d0b5d181d182d18c20d0bad0b0d0bad0b8d0b52dd182d0be20d181d0bad180d18bd182d18bd0b520d0bdd0bed0b4d18b2c20d0bad0bed182d0bed180d18bd18520d0bdd0b5d18220d0b220d0bed0b1d189d0b5d0bc20d181d0bfd0b8d181d0bad0b52e20d0a7d182d0be20d18dd182d0be20d0b7d0b020d183d181d182d180d0bed0b9d181d182d0b2d0b03f

Hex Analysis:

Size:	180 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.

All Receptions

All gateways that received this packet
Correlation: Using Mesh Packet ID

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
chem (721c) Primary	0.000s Reference	-125.0 dBm	-18.25 dB	7	LongFast	2026-06-27 22:51:50	Current
No other receptions found within ±2 seconds

1

Total Receptions

1

Unique Gateways

Packet #200702 Success