Packet #992040

Database ID:	992040
Mesh Packet ID:	`0xc9c4aa4e` Used for correlation across gateways
Timestamp:	2026-06-09 15:53:46 UTC
From Node:	Mesh Oscar (Osca)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	jopsis_tracker (👾)
Channel:	SFNarrow
RSSI:	-96 dBm
SNR:	-8.25 dBm
Hop Info:	7/7 hops Start: 7, Limit: 0
Relay Node:	`a5` Last byte of the last hop that relayed this packet

Long Name:	Mesh Oscar
Short Name:	Osca
Node ID:	!75e02ece
MAC Address:	88p14C7O
Hardware:	NRF52_PROMICRO_DIY

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:	75 bytes
Gateway:	!227470d1
Channel:	SFNarrow
Payload Type:	NODEINFO_APP
Hop Count:	7 / 7

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: SFNarrow
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!227470d1` Node ID format
`channel_id`	`SFNarrow`
`packet`	`MeshPacket` (75 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1977626318` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`NODEINFO_APP` NODEINFO_APP	enum
`decoded.payload_length`	`75` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`7` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-96.0` dBm Signal strength at gateway	int32
`rx_snr`	`-8.25` dB Signal quality at gateway	float
`rx_time`	Not set	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	Not set	enum
`delayed`	Not set	enum
`channel`	`32` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`165` Relay node ID	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)
✓ Custom channel: SFNarrow
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (7 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!227470d1`
Signal Metrics:	RSSI: -96.0 dBm SNR: -8.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	75 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!75e02ece", "long_name": "Mesh Oscar", "short_name": "Osca", "macaddr": "88p14C7O", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1977626318, "to": 4294967295, "channel": 32, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNzVlMDJlY2USCk1lc2ggT3NjYXIaBE9zY2EiBvPKdeAuzig/QiBqH+P1TWeed56YtGZ4wxNUp0drQQzMwdlsbDQmrsg6PEgA", "bitfield": 1 }, "id": 3385109070, "rx_snr": -8.25, "rx_rssi": -96, "hop_start": 7, "relay_node": 165, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "SFNarrow", "gateway_id": "!227470d1" }, "mesh_packet": { "from": 1977626318, "to": 4294967295, "channel": 32, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNzVlMDJlY2USCk1lc2ggT3NjYXIaBE9zY2EiBvPKdeAuzig/QiBqH+P1TWeed56YtGZ4wxNUp0drQQzMwdlsbDQmrsg6PEgA", "bitfield": 1, "parsed_payload": { "id": "!75e02ece", "long_name": "Mesh Oscar", "short_name": "Osca", "macaddr": "88p14C7O", "hw_model": "NRF52_PROMICRO_DIY", "public_key": "ah/j9U1nnneemLRmeMMTVKdHa0EMzMHZbGw0Jq7IOjw=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } }, "id": 3385109070, "rx_snr": -8.25, "rx_rssi": -96, "hop_start": 7, "relay_node": 165, "transport_mechanism": "TRANSPORT_LORA" } }

Raw Packet Data (75 bytes)

0a09213735653032656365120a4d657368204f736361721a044f7363612206f3ca75e02ece283f42206a1fe3f54d679e779e98b46678c31354a7476b410cccc1d96c6c3426aec83a3c4800

Hex Analysis:

Size:	75 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 #992040 Success

Packet Information

Payload Data

Decoded Data: