Packet #3109705

Database ID:	3109705
Mesh Packet ID:	`0x4d206f4a` Used for correlation across gateways
Timestamp:	2025-08-19 16:28:33 UTC
From Node:	Veere - Sandenburg 🏡☀🇳🇱 (OVRE)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TELEMETRY_APP Port: 67

Gateway:	Veere - Sandenburg [G] 🏡🔌 (GVRE)
Channel:	LongFast
RSSI:	-43 dBm
SNR:	6.0 dBm
Hop Info:	0/5 hops Start: 5, Limit: 5

Temperature:	46.3°C
Humidity:	46.6%
Pressure:	1014.6 hPa

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:	40 bytes
Gateway:	!433dfb14
Channel:	LongFast
Payload Type:	TELEMETRY_APP
Hop Count:	Unknown / 5

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

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!433dfb14` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (40 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3247201079` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`67` TELEMETRY_APP	enum
`decoded.payload_length`	`40` 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`	`-43.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.00` dB Signal quality at gateway	float
`rx_time`	`1755613710` 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`	`1755613713.213915` 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
✓ 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:	`!433dfb14`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -43.0 dBm SNR: 6.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	TELEMETRY_APP
Size:	40 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "time": 1755613709, "environment_metrics": { "temperature": 46.318977, "relative_humidity": 46.592915, "barometric_pressure": 1014.58374, "gas_resistance": 164.31354, "voltage": 4.12, "current": -6.4, "iaq": 196 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433dfb14", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3247201079, "to": 4294967295, "id": 1293971274, "rx_time": 1755613710, "rx_snr": 6.0, "rx_rssi": -43, "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": 67, "payload": "0d0d8aa4681a210da246394215255f3a421d5ca57d4425445024432d0ad7834035cdccccc038c401", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "time": 1755613709, "environment_metrics": { "temperature": 46.318977, "relative_humidity": 46.592915, "barometric_pressure": 1014.58374, "gas_resistance": 164.31354, "voltage": 4.12, "current": -6.4, "iaq": 196 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } } } }

Raw Packet Data (40 bytes)

0d0d8aa4681a210da246394215255f3a421d5ca57d4425445024432d0ad7834035cdccccc038c401

Hex Analysis:

Size:	40 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 #3109705 Success

Packet Information

Payload Data

Decoded Data:

Environment Metrics: