Packet #2819244

Database ID:	2819244
Mesh Packet ID:	`0x79e97155` Used for correlation across gateways
Timestamp:	2025-11-27 20:57:55 UTC
From Node:	CBZ1 Astoria Solar (CBZ1)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TELEMETRY_APP Port: 67

Gateway:	DRP0 Astoria (DRP0)
Channel:	MediumSlow
RSSI:	-101 dBm
SNR:	-1.75 dBm
Hop Info:	0/3 hops Start: 3, Limit: 3
Relay Node:	`b2` 😴 , CBZ1 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Battery:	100%
Voltage:	4.21 V
Air Util TX:	0.0%

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:	!16c3f47c
Channel:	MediumSlow
Payload Type:	TELEMETRY_APP
Hop Count:	Unknown / 3

Privacy Summary

Exposure Level:
Broadcast

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

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

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!16c3f47c` Node ID format
`channel_id`	`MediumSlow`
`packet`	`MeshPacket` (28 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3741700786` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`67` TELEMETRY_APP	enum
`decoded.payload_length`	`28` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-101.0` dBm Signal strength at gateway	int32
`rx_snr`	`-1.75` dB Signal quality at gateway	float
`rx_time`	`1764277184` 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`	`178` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1764277075.1999323` 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)
✓ Custom channel: MediumSlow
✓ 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:	`!16c3f47c`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -101.0 dBm SNR: -1.75 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": 1764277180, "device_metrics": { "battery_level": 100, "voltage": 4.206, "channel_utilization": 0.0, "air_util_tx": 0.035666667, "uptime_seconds": 179902 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!16c3f47c", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3741700786, "to": 4294967295, "id": 2045342037, "rx_time": 1764277184, "rx_snr": -1.75, "rx_rssi": -101, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 178, "tx_after": 0, "decoded": { "portnum": 67, "payload": "0dbcbb286912150864158d9786401d00000000253617123d28befd0a", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "time": 1764277180, "device_metrics": { "battery_level": 100, "voltage": 4.206, "channel_utilization": 0.0, "air_util_tx": 0.035666667, "uptime_seconds": 179902 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } } } }

Raw Packet Data (28 bytes)

0dbcbb286912150864158d9786401d00000000253617123d28befd0a

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 #2819244 Success

Packet Information

Payload Data

Decoded Data:

Device Metrics: