Packet #125348

Packet Information

Database ID:	125348
Mesh Packet ID:	`0x444ac37d` Used for correlation across gateways
Timestamp:	2025-09-29 18:03:45 UTC
From Node:	metala K9 (mk9)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TEXT_MESSAGE_APP Port: 1

Gateway:	m-base-v (mb-v)
Channel:	Bulgaria
RSSI:	-80 dBm
SNR:	10.75 dBm
Hop Info:	1/2 hops Start: 2, Limit: 1

Payload Data

Protocol: TEXT_MESSAGE_APP

Size: 171 bytes

Decoded: Yes

Text Content:

Та имам в стаята 3 x Heltec v2.1, 1x Wireless Stick lite, 2 x CT62 (868, още несглобени) и новия CT62 (433), който ще тествам

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:	171 bytes
Gateway:	!b03c800c
Channel:	Bulgaria
Payload Type:	TEXT_MESSAGE_APP
Hop Count:	1 / 2

Privacy Summary

Exposure Level:
Broadcast

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

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

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!b03c800c` Node ID format
`channel_id`	`Bulgaria`
`packet`	`MeshPacket` (171 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2324897948` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`1` TEXT_MESSAGE_APP	enum
`decoded.payload_length`	`171` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-80.0` dBm Signal strength at gateway	int32
`rx_snr`	`10.75` dB Signal quality at gateway	float
`rx_time`	`1759158224` 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`	`255` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1759158225.2792335` 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: Bulgaria
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b03c800c`
Signal Metrics:	RSSI: -80.0 dBm SNR: 10.75 dB

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b03c800c", "channel_id": "Bulgaria", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2324897948, "to": 4294967295, "id": 1145750397, "rx_time": 1759158224, "rx_snr": 10.75, "rx_rssi": -80, "hop_limit": 1, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 255, "tx_after": 0, "decoded": { "portnum": 1, "payload": "d0a2d0b020d0b8d0bcd0b0d0bc20d0b220d181d182d0b0d18fd182d0b0203320782048656c7465632076322e312c20317820576972656c65737320537469636b206c6974652c20322078204354363220283836382c20d0bed189d0b520d0bdd0b5d181d0b3d0bbd0bed0b1d0b5d0bdd0b82920d0b820d0bdd0bed0b2d0b8d18f20435436322028343333292c20d0bad0bed0b9d182d0be20d189d0b520d182d0b5d181d182d0b2d0b0d0bc", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "text": "Та имам в стаята 3 x Heltec v2.1, 1x Wireless Stick lite, 2 x CT62 (868, още несглобени) и новия CT62 (433), който ще тествам", "type": "text_message", "portnum": "TEXT_MESSAGE_APP" } } } }

Raw Packet Data (171 bytes)

d0a2d0b020d0b8d0bcd0b0d0bc20d0b220d181d182d0b0d18fd182d0b0203320782048656c7465632076322e312c20317820576972656c65737320537469636b206c6974652c20322078204354363220283836382c20d0bed189d0b520d0bdd0b5d181d0b3d0bbd0bed0b1d0b5d0bdd0b82920d0b820d0bdd0bed0b2d0b8d18f20435436322028343333292c20d0bad0bed0b9d182d0be20d189d0b520d182d0b5d181d182d0b2d0b0d0bc

Hex Analysis:

Size:	171 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.

All Receptions

All gateways that received this packet
Correlation: Using Mesh Packet ID

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
m-base-v (mb-v) Primary	0.000s Reference	-80.0 dBm	10.75 dB	1	Bulgaria	2025-09-29 18:03:45	Current
No other receptions found within ±2 seconds

1

Total Receptions

1

Unique Gateways

Packet #125348 Success