Packet #118940

Packet Information

Database ID:	118940
Mesh Packet ID:	`0x5637f9d1` Used for correlation across gateways
Timestamp:	2026-04-19 12:09:17 Саратов/Балаково (UTC+4)
From Node:	Overdrive (ovrd)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	chem (721c)
Channel:	LongFast
RSSI:	-112 dBm
SNR:	-7.25 dBm
Hop Info:	7/7 hops Start: 7, Limit: 0

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 57 bytes

Decoded: Yes

Text Content:

Ну пока меня интересуют R.P.L. и CBY

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:	57 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` (57 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`181024056` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`57` 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`	`-112.0` dBm Signal strength at gateway	int32
`rx_snr`	`-7.25` dB Signal quality at gateway	float
`rx_time`	`1776586156` 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`	`56` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`2026-04-19 11:09:17.391008+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: -112.0 dBm SNR: -7.25 dB

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!9e78721c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 181024056, "to": 4294967295, "id": 1446509009, "rx_time": 1776586156, "rx_snr": -7.25, "rx_rssi": -112, "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": 56, "tx_after": 0, "decoded": { "portnum": 1, "payload": "d09dd18320d0bfd0bed0bad0b020d0bcd0b5d0bdd18f20d0b8d0bdd182d0b5d180d0b5d181d183d18ed18220522e502e4c2e20d0b820434259", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "text": "Ну пока меня интересуют R.P.L. и CBY", "type": "text_message", "portnum": "TEXT_MESSAGE_APP" } } } }

Raw Packet Data (57 bytes)

d09dd18320d0bfd0bed0bad0b020d0bcd0b5d0bdd18f20d0b8d0bdd182d0b5d180d0b5d181d183d18ed18220522e502e4c2e20d0b820434259

Hex Analysis:

Size:	57 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	-112.0 dBm	-7.25 dB	7	LongFast	2026-04-19 12:09:17	Current
No other receptions found within ±2 seconds

1

Total Receptions

1

Unique Gateways

Packet #118940 Success