Glossary and terminology

Terms

• Connection — a configured link to your LNS (MQTT for data, REST API for provisioning).
• Decoder — parses a raw payload into named values (JavaScript or API).
• Device profile — reusable template (decoder, UDT, values, downlinks) per sensor type.
• Downlink — a message sent from SiteSync to a device.
• Field App — the site-facing app for onboarding and monitoring.
• LNS — LoRa Network Server (ChirpStack, Actility ThingPark, The Things Stack, Loriot, Multitech Conduit).
• Missed Check-in — device hasn’t reported within its expected interval (formerly “Offline”).
• Needs Attention — a device that is Missed Check-in, Critical battery, or Fair/Poor signal.
• Site — the organizational unit every device belongs to (Enterprise).
• SiteSync Source — the parent Perspective project the Enterprise projects (Enterprise Management, Field App) inherit from.
• UDT — Ignition User Defined Template defining the structure of decoded data.
• Uplink — a message sent from a device to the network.

Identifiers and radio terms

Term	Meaning
DevEUI	The device’s unique 64-bit hardware identifier (16 hex characters). On the device label.
JoinEUI / AppEUI	Identifies the join server / application the device joins (16 hex characters). “AppEUI” is the older name for the same value.
AppKey	The 32-hex-character root key used to secure OTAA joins.
Frame counter (fCntUp)	Increments by 1 per uplink; gaps indicate dropped packets (used for packet delivery).
RSSI	Received Signal Strength Indicator (dBm) — how strong the signal is at the gateway. Closer to 0 is stronger.
SNR	Signal-to-Noise Ratio (dB) — how clearly the signal stands out from noise. Higher is better.
Spreading factor (SF)	The LoRa data-rate setting. Lower SF = faster, shorter range; higher SF = slower, longer range.
Device class	LoRaWAN class. Class A listens only briefly after an uplink; Class C listens continuously (see Class A timing).

Related pages

• Health metrics