Packet #3150303

Database ID:	3150303
Mesh Packet ID:	`0xf15f8e47` Used for correlation across gateways
Timestamp:	2025-07-08 17:26:31 UTC
From Node:	srs-T114 ☀️📡 (srs2)
To Node:	TRJ1 - Base 🗼🌞 (TRJ1)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	srs-T1000E 📟 (srs3)
Channel:	MediumSlow
RSSI:	-22 dBm
SNR:	13.0 dBm
Hop Info:	0/5 hops Start: 5, Limit: 5

Long Name:	srs-T114 ☀️📡
Short Name:	srs2
Node ID:	!522c5fd9
MAC Address:	2shSLF/Z
Hardware:	HELTEC_MESH_NODE_T114

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:	84 bytes
Gateway:	!ebc74f4c
Channel:	MediumSlow
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 5

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!ebc74f4c` Node ID format
`channel_id`	`MediumSlow`
`packet`	`MeshPacket` (84 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1378639833` Source node ID	uint32
`to`	`873606212` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`84` bytes	size
`hop_limit`	`5` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-22.0` dBm Signal strength at gateway	int32
`rx_snr`	`13.00` dB Signal quality at gateway	float
`rx_time`	`1751995581` 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`	`217` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1751995591.3481617` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Direct Message

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
✓ Custom channel: MediumSlow
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!ebc74f4c`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -22.0 dBm SNR: 13.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	84 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!522c5fd9", "long_name": "srs-T114 ☀️📡", "short_name": "srs2", "macaddr": "2shSLF/Z", "hw_model": "HELTEC_MESH_NODE_T114" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ebc74f4c", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1378639833, "to": 873606212, "id": 4049571399, "rx_time": 1751995581, "rx_snr": 13.0, "rx_rssi": -22, "hop_limit": 5, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 217, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921353232633566643912137372732d5431313420e29880efb88ff09f93a11a04737273322206dac8522c5fd92845422038c147930fee74e85d7630f40982903506359ee4b1b45e0313a7100ac3d147044800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!522c5fd9", "long_name": "srs-T114 ☀️📡", "short_name": "srs2", "macaddr": "2shSLF/Z", "hw_model": "HELTEC_MESH_NODE_T114", "public_key": "OMFHkw/udOhddjD0CYKQNQY1nuSxtF4DE6cQCsPRRwQ=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (84 bytes)

0a0921353232633566643912137372732d5431313420e29880efb88ff09f93a11a04737273322206dac8522c5fd92845422038c147930fee74e85d7630f40982903506359ee4b1b45e0313a7100ac3d147044800

Hex Analysis:

Size:	84 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.

Packet #3150303 Success

Packet Information

Payload Data

Decoded Data: