Packet #27656964

Database ID:	27656964
Mesh Packet ID:	`0x4272f371` Used for correlation across gateways
Timestamp:	2025-12-14 19:15:06 UTC
From Node:	Meshtastic a0c4 (A0C4)
To Node:	Alfa 01 (A-01)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Karman’s HeltecV4 Beta (KHV4)
Channel:	MediumFast
RSSI:	-104 dBm
SNR:	-10.5 dBm
Hop Info:	3/3 hops Start: 3, Limit: 0
Relay Node:	`fa` CN4 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	Meshtastic a0c4
Short Name:	A0C4
Node ID:	!acaba0c4
MAC Address:	2IWsq6DE
Hardware:	HELTEC_V3

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:	80 bytes
Gateway:	!4e5948a8
Channel:	MediumFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 3

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (3 hops)
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!4e5948a8` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2896928964` Source node ID	uint32
`to`	`723623046` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` 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`	`-104.0` dBm Signal strength at gateway	int32
`rx_snr`	`-10.50` dB Signal quality at gateway	float
`rx_time`	`1765739705` 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`	`250` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1765739706.9379375` 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: MediumFast
✓ Gateway node ID tracked

Exposure Risks:

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

MQTT-Specific Fields

Gateway ID:	`!4e5948a8`
Signal Metrics:	RSSI: -104.0 dBm SNR: -10.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	80 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!acaba0c4", "long_name": "Meshtastic a0c4", "short_name": "A0C4", "macaddr": "2IWsq6DE", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!4e5948a8", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2896928964, "to": 723623046, "id": 1114829681, "rx_time": 1765739705, "rx_snr": -10.5, "rx_rssi": -104, "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": 250, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216163616261306334120f4d65736874617374696320613063341a04413043342206d885acaba0c4282b4220427f1dcd5d8f684d22ed630c3572504975b3801b782f451133cf4aaffcd2c4454800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!acaba0c4", "long_name": "Meshtastic a0c4", "short_name": "A0C4", "macaddr": "2IWsq6DE", "hw_model": "HELTEC_V3", "public_key": "Qn8dzV2PaE0i7WMMNXJQSXWzgBt4L0URM89Kr/zSxEU=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09216163616261306334120f4d65736874617374696320613063341a04413043342206d885acaba0c4282b4220427f1dcd5d8f684d22ed630c3572504975b3801b782f451133cf4aaffcd2c4454800

Hex Analysis:

Size:	80 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 #27656964 Success

Packet Information

Payload Data

Decoded Data: