Packet #2727747 Success

POSITION_APP packet from Nicomachus (ncmc) to Meshtastic ETNA (ETNA)

Total Receptions

Unique Gateways

Hop Count

Payload Bytes

Packet Information

Database ID:	2727747
Mesh Packet ID:	`0x5d645497` Used for correlation across gateways
Timestamp:	2025-11-25 09:21:00 UTC
From Node:	Nicomachus (ncmc)
To Node:	Meshtastic ETNA (ETNA)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Meshtastic 1ca3 (1ca3)
Channel:	LongFast
RSSI:	-123 dBm
SNR:	-14.75 dBm
Hop Info:	3/4 hops Start: 4, Limit: 1
Relay Node:	`31` a031 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Payload Data

Protocol: POSITION_APP

Size: 30 bytes

Decoded: Yes

Decoded Data:

Latitude:	40.671642°
Longitude:	-73.990144°
Altitude:	21 m
Satellites:	12
Precision:	14 bits

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:	30 bytes
Gateway:	!8ac01ca3
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	3 / 4

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!8ac01ca3` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (30 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2658555520` Source node ID	uint32
`to`	`2249414613` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`30` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-123.0` dBm Signal strength at gateway	int32
`rx_snr`	`-14.75` dB Signal quality at gateway	float
`rx_time`	`1764062561` 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`	`49` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1764062460.1943204` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Direct Message

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
✓ Gateway node ID tracked
✓ Reduced position precision: ~1500.0m accuracy

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!8ac01ca3`
Position Precision:	14 bits (~1500.0m accuracy)
Position precision meters:	`1500.0`
Signal Metrics:	RSSI: -123.0 dBm SNR: -14.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	30 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 40.6716416, "longitude": -73.990144, "altitude": 21, "sats_in_view": 12, "precision_bits": 14 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!8ac01ca3", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2658555520, "to": 2249414613, "id": 1566856343, "rx_time": 1764062561, "rx_snr": -14.75, "rx_rssi": -123, "hop_limit": 1, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 49, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00003e18150000e6d31815254b7525692803780080010098010cb8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 406716416, "longitude_i": -739901440, "altitude": 21, "time": 1764062539, "location_source": "LOC_EXTERNAL", "ground_speed": 0, "ground_track": 0, "sats_in_view": 12, "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (30 bytes)

0d00003e18150000e6d31815254b7525692803780080010098010cb8010e

Hex Analysis:

Size:	30 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

Reception Locations

Loading reception map...

Map shows gateway locations that received this packet. Hop counts are displayed if available.

Gateway	Time Offset	RSSI	SNR	Hops	Relay	Channel	Timestamp	Actions
Meshtastic 1ca3 (1ca3) Primary	0.000s Reference	-123.0 dBm	-14.75 dB	3	`31` a031	LongFast	2025-11-25 09:21:00 UTC	Current
ClaremontWx.net (CmWx)	-4.573s Before	-103.0 dBm	-14.50 dB	1	`d4`	LongFast	2025-11-25 09:20:55 UTC	View
Sunset Soda (p8p)	-4.274s Before	-119.0 dBm	-7.50 dB	1	`d4` 🦮	LongFast	2025-11-25 09:20:55 UTC	View
K2XAP / nyme.sh (XAP)	-2.068s Before	-37.0 dBm	6.75 dB	2	`57` CmWx	LongFast	2025-11-25 09:20:58 UTC	View
dkTowerBot (dkTB)	+0.791s After	-104.0 dBm	-13.75 dB	4	`28` b028	LongFast	2025-11-25 09:21:00 UTC	View
Fried Fish 1 \| nyme.sh (FF1)	+1.033s After	-89.0 dBm	-0.75 dB	4	`b8` 🫠	LongFast	2025-11-25 09:21:01 UTC	View
Steiner Studios Tower (SST)	+5.313s After	-113.0 dBm	-9.75 dB	2	`c9` Penn , JLX3	LongFast	2025-11-25 09:21:05 UTC	View
Smorgasburg \| nyme.sh (SMRG)	+5.610s After	-105.0 dBm	-3.50 dB	2	`c9` Penn , JLX3	LongFast	2025-11-25 09:21:05 UTC	View
DRP1 Chelsea (DRP1)	+5.662s After	-77.0 dBm	5.50 dB	2	`c9` Penn , JLX3	LongFast	2025-11-25 09:21:05 UTC	View
LORSANGE (LORS)	+5.666s After	-113.0 dBm	-5.25 dB	2	`c9` Penn	LongFast	2025-11-25 09:21:05 UTC	View
Cams Rak4631 (CARA)	+8.260s After	-116.0 dBm	-6.75 dB	4	`74` ec74	LongFast	2025-11-25 09:21:08 UTC	View
nLink-NY-Jamaica1 (NLJ1)	+10.135s After	-90.0 dBm	3.50 dB	3	`88` grns , 2f88 , P3NY	LongFast	2025-11-25 09:21:10 UTC	View
YMH 2 @ Your Mom’s House (YMH2)	+12.822s After	-68.0 dBm	-5.25 dB	3	`90` NLG1	LongFast	2025-11-25 09:21:13 UTC	View
YMH 1 @ Your Mom’s House (YMH1)	+16.724s After	-122.0 dBm	-18.00 dB	3	`fc`	LongFast	2025-11-25 09:21:16 UTC	View
SunnySolar (Suny)	+20.564s After	-119.0 dBm	-18.00 dB	4	`b8`	LongFast	2025-11-25 09:21:20 UTC	View

15

Total Receptions

15

Unique Gateways