Packet #193983

Database ID:	193983
Mesh Packet ID:	`0x418b9c91` Used for correlation across gateways
Timestamp:	2026-04-24 12:09:38 UTC
From Node:	Meshtastic 54d4 (54d4)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	MIB Node 0 - nepamesh (MIB0)
Channel:	LongFast
RSSI:	-86 dBm
SNR:	1.75 dBm
Hop Info:	0/0 hops Start: 0, Limit: 0
Relay Node:	None

Long Name:	Meshtastic 54d4
Short Name:	54d4
Node ID:	!a69654d4
MAC Address:	iFamllTU
Hardware:	HELTEC_V4

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:	!b2a72e48
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	0 / 0

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!b2a72e48` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`2794869972` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`NODEINFO_APP` NODEINFO_APP	enum
`decoded.payload_length`	`80` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	Not set	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-86.0` dBm Signal strength at gateway	int32
`rx_snr`	`1.75` dB Signal quality at gateway	float
`rx_time`	`1777032404` 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`	Not set	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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b2a72e48`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -86.0 dBm SNR: 1.75 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": "!a69654d4", "long_name": "Meshtastic 54d4", "short_name": "54d4", "macaddr": "iFamllTU", "hw_model": "HELTEC_V4" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 2794869972, "to": 4294967295, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhYTY5NjU0ZDQSD01lc2h0YXN0aWMgNTRkNBoENTRkNCIGiFamllTUKG5CIF4aNkxKpq0YYmEkUg0zwuaB2kfYjFeE+NhTKgzWOntcSAA=" }, "id": 1099668625, "rx_time": 1777032404, "rx_snr": 1.75, "rx_rssi": -86, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!b2a72e48" }, "mesh_packet": { "from": 2794869972, "to": 4294967295, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhYTY5NjU0ZDQSD01lc2h0YXN0aWMgNTRkNBoENTRkNCIGiFamllTUKG5CIF4aNkxKpq0YYmEkUg0zwuaB2kfYjFeE+NhTKgzWOntcSAA=", "parsed_payload": { "id": "!a69654d4", "long_name": "Meshtastic 54d4", "short_name": "54d4", "macaddr": "iFamllTU", "hw_model": "HELTEC_V4", "public_key": "Xho2TEqmrRhiYSRSDTPC5oHaR9iMV4T42FMqDNY6e1w=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } }, "id": 1099668625, "rx_time": 1777032404, "rx_snr": 1.75, "rx_rssi": -86, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (80 bytes)

0a09216136393635346434120f4d65736874617374696320353464341a043534643422068856a69654d4286e42205e1a364c4aa6ad18626124520d33c2e681da47d88c5784f8d8532a0cd63a7b5c4800

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 #193983 Success

Packet Information

Payload Data

Decoded Data: