Packet #28009515

Packet Information

Database ID:	28009515
Mesh Packet ID:	`0x86f458df` Used for correlation across gateways
Timestamp:	2025-12-16 09:27:06 UTC
From Node:	A012-1314 (A012)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	[samsepi0l] 📡🌐 (tlg0)
Channel:	MediumFast
RSSI:	-75 dBm
SNR:	-5.25 dBm
Hop Info:	3/3 hops Start: 3, Limit: 0
Relay Node:	`fc` 74fc , Anu2 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 4 bytes

Decoded: Yes

Text Content:

😀

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:	4 bytes
Gateway:	!69828c38
Channel:	MediumFast
Payload Type:	TEXT_MESSAGE_APP
Hop Count:	3 / 3

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumFast
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!69828c38` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (4 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2661417696` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`4` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-75.0` dBm Signal strength at gateway	int32
`rx_snr`	`-5.25` dB Signal quality at gateway	float
`rx_time`	`1765877225` 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`	`252` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1765877226.2170656` 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)
✓ Custom channel: MediumFast
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!69828c38`
Signal Metrics:	RSSI: -75.0 dBm SNR: -5.25 dB

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!69828c38", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2661417696, "to": 4294967295, "id": 2264160479, "rx_time": 1765877225, "rx_snr": -5.25, "rx_rssi": -75, "hop_limit": 0, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 252, "tx_after": 0, "decoded": { "portnum": 1, "payload": "f09f9880", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "text": "😀", "type": "text_message", "portnum": "TEXT_MESSAGE_APP" } } } }

Raw Packet Data (4 bytes)

f09f9880

Hex Analysis:

Size:	4 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	Relay	Channel	Timestamp	Actions
[samsepi0l] 📡🌐 (tlg0) Primary	0.000s Reference	-75.0 dBm	-5.25 dB	3	`fc` 74fc , Anu2	MediumFast	2025-12-16 09:27:06 UTC	Current
No other receptions found within ±2 seconds

1

Total Receptions

1

Unique Gateways

Packet #28009515 Success