Packet #2687328

Packet Information

Database ID:	2687328
Mesh Packet ID:	`0x589df819` Used for correlation across gateways
Timestamp:	2025-08-16 13:28:37 UTC
From Node:	Ulftastic Fixed 1 (UTF1)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	Ulftastic Fixed 1 (UTF1)
Channel:	LongFast
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/3 hops Start: 3, Limit: 3

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 29 bytes

Decoded: Yes

Text Content:

Hello! Anyone receiving this?

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:	29 bytes
Gateway:	!b03c8370
Channel:	LongFast
Payload Type:	TEXT_MESSAGE_APP
Hop Count:	Unknown / 3

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!b03c8370` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (29 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2956755824` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`29` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1755343716` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`100` Packet priority level	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`112` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1755343717.8391736` 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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers

MQTT-Specific Fields

Gateway ID:	`!b03c8370`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b03c8370", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2956755824, "to": 4294967295, "id": 1486747673, "rx_time": 1755343716, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 100, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 112, "tx_after": 0, "decoded": { "portnum": 1, "payload": "48656c6c6f2120416e796f6e6520726563656976696e6720746869733f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "text": "Hello! Anyone receiving this?", "type": "text_message", "portnum": "TEXT_MESSAGE_APP" } } } }

Raw Packet Data (29 bytes)

48656c6c6f2120416e796f6e6520726563656976696e6720746869733f

Hex Analysis:

Size:	29 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
Ulftastic Fixed 1 (UTF1) Primary	0.000s Reference	Unknown	Unknown	0	LongFast	2025-08-16 13:28:37	Current
No other receptions found within ±2 seconds

1

Total Receptions

1

Unique Gateways

Packet #2687328 Success