Packet #3347973

Database ID:	3347973
Mesh Packet ID:	`0x56afc5fa` Used for correlation across gateways
Timestamp:	2025-07-10 22:00:35 UTC
From Node:	sah_two (sah2)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	S2_Node (S2)
Channel:	LongFast
RSSI:	-128 dBm
SNR:	-18.75 dBm
Hop Info:	2/6 hops Start: 6, Limit: 4

Long Name:	sah_two
Short Name:	sah2
Node ID:	!a0cb511c
MAC Address:	MO2gy1Ec
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:	72 bytes
Gateway:	!fa68b1d0
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 6

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`	`!fa68b1d0` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (72 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2697679132` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`72` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`6` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-128.0` dBm Signal strength at gateway	int32
`rx_snr`	`-18.75` dB Signal quality at gateway	float
`rx_time`	`1752184832` 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`	`211` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752184835.26671` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!fa68b1d0`
Signal Metrics:	RSSI: -128.0 dBm SNR: -18.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	72 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!a0cb511c", "long_name": "sah_two", "short_name": "sah2", "macaddr": "MO2gy1Ec", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!fa68b1d0", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2697679132, "to": 4294967295, "id": 1454360058, "rx_time": 1752184832, "rx_snr": -18.75, "rx_rssi": -128, "hop_limit": 4, "hop_start": 6, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 211, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921613063623531316312077361685f74776f1a0473616832220630eda0cb511c282b4220d3cf0767c5ffdbaeb44774197a4c14ef4ee0c77372775aee7d2b3484f74ff94f4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!a0cb511c", "long_name": "sah_two", "short_name": "sah2", "macaddr": "MO2gy1Ec", "hw_model": "HELTEC_V3", "public_key": "088HZ8X/2660R3QZekwU707gx3Nyd1rufSs0hPdP+U8=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (72 bytes)

0a0921613063623531316312077361685f74776f1a0473616832220630eda0cb511c282b4220d3cf0767c5ffdbaeb44774197a4c14ef4ee0c77372775aee7d2b3484f74ff94f4800

Hex Analysis:

Size:	72 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 #3347973 Success

Packet Information

Payload Data

Decoded Data: