Packet #1701379

Database ID:	1701379
Mesh Packet ID:	`0x2d494845` Used for correlation across gateways
Timestamp:	2026-04-02 06:49:42 UTC
From Node:	Vladimirovo D 🇧🇬🔋🌞 (VLD1)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TELEMETRY_APP Port: 67

Gateway:	Vladimirovo G 🇧🇬🏡🛰️ (VLG1)
Channel:	ShortFast
RSSI:	-78 dBm
SNR:	10.5 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2
Relay Node:	`50` VLD1 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Battery:	81%
Voltage:	4.00 V
Channel Usage:	0.9%
Air Util TX:	0.3%

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:	28 bytes
Gateway:	!7d542fb4
Channel:	ShortFast
Payload Type:	TELEMETRY_APP
Hop Count:	0 / 2

Privacy Summary

Exposure Level:
Broadcast

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

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

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!7d542fb4` Node ID format
`channel_id`	`ShortFast`
`packet`	`MeshPacket` (28 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`3677317712` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`TELEMETRY_APP` TELEMETRY_APP	enum
`decoded.payload_length`	`28` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-78.0` dBm Signal strength at gateway	int32
`rx_snr`	`10.50` dB Signal quality at gateway	float
`rx_time`	`1775112582` 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`	`112` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`80` 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: ShortFast
✓ 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:	`!7d542fb4`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -78.0 dBm SNR: 10.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	TELEMETRY_APP
Size:	28 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "time": 1775112573, "device_metrics": { "battery_level": 81, "voltage": 3.998, "channel_utilization": 0.91, "air_util_tx": 0.2956111, "uptime_seconds": 126066 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 3677317712, "to": 4294967295, "channel": 112, "decoded": { "portnum": "TELEMETRY_APP", "payload": "DX0RzmkSFQhRFTvff0Adw/VoPyVXWpc+KPLYBw==", "bitfield": 1 }, "id": 759777349, "rx_time": 1775112582, "rx_snr": 10.5, "hop_limit": 2, "rx_rssi": -78, "hop_start": 2, "relay_node": 80 }, "channel_id": "ShortFast", "gateway_id": "!7d542fb4" }, "mesh_packet": { "from": 3677317712, "to": 4294967295, "channel": 112, "decoded": { "portnum": "TELEMETRY_APP", "payload": "DX0RzmkSFQhRFTvff0Adw/VoPyVXWpc+KPLYBw==", "bitfield": 1, "parsed_payload": { "time": 1775112573, "device_metrics": { "battery_level": 81, "voltage": 3.998, "channel_utilization": 0.91, "air_util_tx": 0.2956111, "uptime_seconds": 126066 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } }, "id": 759777349, "rx_time": 1775112582, "rx_snr": 10.5, "hop_limit": 2, "rx_rssi": -78, "hop_start": 2, "relay_node": 80 } }

Raw Packet Data (28 bytes)

0d7d11ce6912150851153bdf7f401dc3f5683f25575a973e28f2d807

Hex Analysis:

Size:	28 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 #1701379 Success

Packet Information

Payload Data

Decoded Data:

Device Metrics: