Packet #355101

Packet Information

Database ID:	355101
Mesh Packet ID:	`0xde1a4447` Used for correlation across gateways
Timestamp:	2025-12-09 13:40:16 UTC
From Node:	Sashtastic 6f00 (S⁰)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	📡 sarmesh.zulipchat.com (O1v4)
Channel:	LongFast
RSSI:	-95 dBm
SNR:	-5.0 dBm
Hop Info:	3/7 hops Start: 7, Limit: 4

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 6 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:	6 bytes
Gateway:	!6984a85c
Channel:	LongFast
Payload Type:	TEXT_MESSAGE_APP
Hop Count:	3 / 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`	`!6984a85c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (6 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2658496256` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`6` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-95.0` dBm Signal strength at gateway	int32
`rx_snr`	`-5.00` dB Signal quality at gateway	float
`rx_time`	`1765272437` 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`	`204` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1765273216.6979163` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!6984a85c`
Signal Metrics:	RSSI: -95.0 dBm SNR: -5.00 dB

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!6984a85c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2658496256, "to": 4294967295, "id": 3726263367, "rx_time": 1765272437, "rx_snr": -5.0, "rx_rssi": -95, "hop_limit": 4, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 204, "tx_after": 0, "decoded": { "portnum": 1, "payload": "e29883efb88f", "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 (6 bytes)

e29883efb88f

Hex Analysis:

Size:	6 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

Reception Locations

Loading reception map...

Map shows gateway locations that received this packet. Hop counts are displayed if available.

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
📡 sarmesh.zulipchat.com (O1v4) Primary	0.000s Reference	-95.0 dBm	-5.00 dB	3	LongFast	2025-12-09 13:40:16	Current
MDX1 (9650)	-200.820s Before	-90.0 dBm	-20.25 dB	4	LongFast	2025-12-09 13:36:55	View

2

Total Receptions

2

Unique Gateways

Packet #355101 Success