Packet #3193394

Database ID:	3193394
Mesh Packet ID:	`0xc51dbbd5` Used for correlation across gateways
Timestamp:	2025-07-09 06:41:09 UTC
From Node:	NetRunner-02 (NR02)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	EA6AMI.2-GW-868 (AMI2)
Channel:	LongFast
RSSI:	-48 dBm
SNR:	6.0 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	Meshtastic c097
Short Name:	c097
Node ID:	!2765c097
MAC Address:	+BInZcCX
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:	78 bytes
Gateway:	!ea8edb44
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 5

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`	`!ea8edb44` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (78 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`660979863` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`78` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-48.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.00` dB Signal quality at gateway	float
`rx_time`	`1752043268` 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`	`246` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752043269.570383` 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 (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!ea8edb44`
Signal Metrics:	RSSI: -48.0 dBm SNR: 6.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	78 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!2765c097", "long_name": "Meshtastic c097", "short_name": "c097", "macaddr": "+BInZcCX", "hw_model": "HELTEC_MESH_NODE_T114" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ea8edb44", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 660979863, "to": 4294967295, "id": 3307060181, "rx_time": 1752043268, "rx_snr": 6.0, "rx_rssi": -48, "hop_limit": 4, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 246, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213237363563303937120f4d65736874617374696320633039371a04633039372206f8122765c0972845422038c147930fee74e85d7630f40982903506359ee4b1b45e0313a7100ac3d14704", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!2765c097", "long_name": "Meshtastic c097", "short_name": "c097", "macaddr": "+BInZcCX", "hw_model": "HELTEC_MESH_NODE_T114", "public_key": "OMFHkw/udOhddjD0CYKQNQY1nuSxtF4DE6cQCsPRRwQ=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (78 bytes)

0a09213237363563303937120f4d65736874617374696320633039371a04633039372206f8122765c0972845422038c147930fee74e85d7630f40982903506359ee4b1b45e0313a7100ac3d14704

Hex Analysis:

Size:	78 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 #3193394 Success

Packet Information

Payload Data

Decoded Data: