Packet #3117114

Database ID:	3117114
Mesh Packet ID:	`0x45c91f3e` Used for correlation across gateways
Timestamp:	2025-08-19 17:53:35 UTC
From Node:	HvM Base (HvM)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Maasdijk Giessen Yagi #1 (MGY1)
Channel:	MediumFast
RSSI:	-117 dBm
SNR:	-5.25 dBm
Hop Info:	0/5 hops Start: 5, Limit: 5

Long Name:	HvM Base
Short Name:	HvM
Node ID:	!a2e50b84
MAC Address:	zI2i5QuE
Hardware:	STATION_G2

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:	74 bytes
Gateway:	!55c8184c
Channel:	MediumFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 5

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumFast
+ 2 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!55c8184c` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (74 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2732919684` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`74` 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`	`-117.0` dBm Signal strength at gateway	int32
`rx_snr`	`-5.25` dB Signal quality at gateway	float
`rx_time`	`1755618814` 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`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1755618815.3270607` 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)
✓ Custom channel: MediumFast
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!55c8184c`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -117.0 dBm SNR: -5.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	74 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!a2e50b84", "long_name": "HvM Base", "short_name": "HvM", "macaddr": "zI2i5QuE", "hw_model": "STATION_G2" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!55c8184c", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2732919684, "to": 4294967295, "id": 1170808638, "rx_time": 1755618814, "rx_snr": -5.25, "rx_rssi": -117, "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": 0, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216132653530623834120848764d20426173651a0348764d2206cc8da2e50b84281f380b4220f40c54b7833842173131ce1a802522ec707ae57233eff44c28b817ff338bd16b4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!a2e50b84", "long_name": "HvM Base", "short_name": "HvM", "macaddr": "zI2i5QuE", "hw_model": "STATION_G2", "role": "ROUTER_LATE", "public_key": "9AxUt4M4QhcxMc4agCUi7HB65XIz7/RMKLgX/zOL0Ws=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (74 bytes)

0a09216132653530623834120848764d20426173651a0348764d2206cc8da2e50b84281f380b4220f40c54b7833842173131ce1a802522ec707ae57233eff44c28b817ff338bd16b4800

Hex Analysis:

Size:	74 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 #3117114 Success

Packet Information

Payload Data

Decoded Data: