MeshCore.md

MeshCore API Reference

The MeshCore framework provides the low-level protocol implementation for MeshCore mesh networking devices.

Note: This document covers the primary public APIs. The full API surface includes 80+ additional methods for advanced use cases like signing, custom variables, telemetry, and device configuration.

Package Information

• Location: MeshCore/
• Type: Swift Package (single library target)
• Dependencies: None (pure Swift)

---

MeshCoreSession (public, actor)

File: MeshCore/Sources/MeshCore/Session/MeshCoreSession.swift

The primary entry point for communicating with a MeshCore device. Serializes all device communication through actor isolation.

Lifecycle

Method	Description
init(transport:configuration:clock:)	Initializes a session with the given transport, optional configuration (defaults to .default), and optional clock for testing
start() async throws	Connects to the device and initializes the session
stop() async	Stops the session and disconnects the transport

Core Properties

Property	Type	Description
currentSelfInfo	SelfInfo?	Returns the device's self info after session start, populated after start() completes
cachedContacts	[MeshContact]	Returns currently cached contacts without making a device request
cachedPendingContacts	[MeshContact]	Returns pending contacts awaiting confirmation
deviceTime	Date?	Returns the last known device time, or nil if not yet queried
isContactsDirty	Bool	Indicates whether the contact cache needs refreshing
connectionState	AsyncStream<ConnectionState>	Stream reflecting the current connection state

Events

Method	Description
events() async -> AsyncStream<MeshEvent>	Returns a stream of all incoming events from the device
waitForEvent(matching:timeout:) async -> MeshEvent?	Waits for a specific event type with optional filtering and timeout
waitForEvent(filter:timeout:) async -> MeshEvent?	Waits for an event matching an EventFilter with timeout
sendAndWait(_:matching:timeout:) async throws -> T	Sends a command and waits for a matching response, avoiding race conditions

Messaging

Method	Description
sendMessage(to:text:timestamp:) async throws -> MessageSentInfo	Sends a direct message to a contact (6-byte public key prefix or Destination)
sendMessageWithRetry(to:text:timestamp:maxAttempts:floodAfter:maxFloodAttempts:timeout:) async throws -> MessageSentInfo?	Sends with automatic retry and flood fallback (requires 32-byte key)
sendChannelMessage(channel:text:timestamp:) async throws	Broadcasts to a channel slot (0-15)
sendCommand(to:command:timestamp:) async throws -> MessageSentInfo	Sends a command message to a remote node
sendAdvertisement(flood:) async throws	Sends an advertisement broadcast, optionally using flood routing
sendLogin(to:password:) async throws -> MessageSentInfo	Sends a login request to a remote node (accepts Data or Destination)
sendLogout(to:) async throws	Sends a logout request to a remote node
sendKeepAlive(to:syncSince:) async throws -> MessageSentInfo	Sends a keep-alive to a room server with sync watermark
sendStatusRequest(to:) async throws -> MessageSentInfo	Requests status information from a remote node
sendTelemetryRequest(to:) async throws -> MessageSentInfo	Requests telemetry data from a remote node
sendPathDiscovery(to:) async throws -> MessageSentInfo	Initiates path discovery to a remote node
sendTrace(tag:authCode:flags:path:) async throws -> MessageSentInfo	Sends a trace packet through the mesh network for debugging
getMessage() async throws -> MessageResult	Fetches next pending message from device queue
startAutoMessageFetching() async	Begins automatically fetching messages on notifications
stopAutoMessageFetching()	Stops automatic message fetching

Contact Management

Method	Description
public func getContacts(since lastModified: Date? = nil) async throws -> [MeshContact]	Fetches contacts from device, optionally filtering to contacts modified since a date
getContact(publicKey:) async throws -> MeshContact?	Fetches a single contact by full public key
ensureContacts(force:) async throws -> [MeshContact]	Ensures contacts are loaded, fetching from device if needed or if cache is dirty
getContactByName(_:exactMatch:) -> MeshContact?	Finds a contact by advertised name with optional exact matching
getContactByKeyPrefix(_:) -> MeshContact?	Finds a contact by public key prefix (accepts String hex or Data)
popPendingContact(publicKey:) -> MeshContact?	Removes and returns a pending contact by hex string public key
flushPendingContacts()	Removes all pending contacts from the cache
setAutoUpdateContacts(_:)	Enables or disables automatic contact updates on advertisements
addContact(_:) async throws	Adds a contact to the device's contact list
updateContact(publicKey:type:flags:outPathLength:outPath:advertisedName:lastAdvertisement:latitude:longitude:) async throws	Low-level method to update or create a contact with full details
changeContactPath(_:path:) async throws	Changes the routing path for a contact while preserving other info
changeContactFlags(_:flags:) async throws	Changes the flags for a contact while preserving other info
removeContact(publicKey:) async throws	Removes a contact from the device's contact list
resetPath(publicKey:) async throws	Resets routing path for a contact, forcing route rediscovery
shareContact(publicKey:) async throws	Shares a contact with nearby devices via broadcast
exportContact(publicKey:) async throws -> String	Exports a contact as a shareable URI string (nil for self)
importContact(cardData:) async throws	Imports a contact from encoded contact card data

Device Configuration

Method	Description
sendAppStart() async throws -> SelfInfo	Sends the app-start command to initialize communication (usually called by start())
queryDevice() async throws -> DeviceCapabilities	Queries hardware capabilities and firmware
getBattery() async throws -> BatteryInfo	Requests battery level and voltage
getTime() async throws -> Date	Gets the current device time
setTime(_:) async throws	Sets the device's current time
setName(_:) async throws	Sets the device's advertised name (max 32 bytes UTF-8)
setCoordinates(latitude:longitude:) async throws	Sets device GPS coordinates for advertisements
setTxPower(_:) async throws	Sets radio transmission power level in dBm
setRadio(frequency:bandwidth:spreadingFactor:codingRate:) async throws	Configures LoRa radio parameters
setTuning(rxDelay:af:) async throws	Configures radio timing parameters for fine-tuning
setOtherParams(manualAddContacts:telemetryModeEnvironment:telemetryModeLocation:telemetryModeBase:advertisementLocationPolicy:multiAcks:) async throws	Sets miscellaneous device parameters (low-level, use granular setters instead)
setTelemetryModeBase(_:) async throws	Sets base telemetry mode (0-3), preserving other settings
setTelemetryModeLocation(_:) async throws	Sets location telemetry mode (0-3), preserving other settings
setTelemetryModeEnvironment(_:) async throws	Sets environment telemetry mode (0-3), preserving other settings
setManualAddContacts(_:) async throws	Sets manual contact approval mode, preserving other settings
setMultiAcks(_:) async throws	Sets multi-acks count, preserving other settings
setAdvertisementLocationPolicy(_:) async throws	Sets advertisement location policy, preserving other settings
getAutoAddConfig() async throws -> UInt8	Returns auto-add config bitmask (v1.12+)
setAutoAddConfig(_:) async throws	Sets auto-add config bitmask (v1.12+)
setDevicePin(_:) async throws	Sets the device PIN for administrative access (4-digit as UInt32)
reboot() async throws	Reboots the device (session will be disconnected)

Telemetry and Statistics

Method	Description
getSelfTelemetry() async throws -> TelemetryResponse	Retrieves telemetry data from the local device
getStatsCore() async throws -> CoreStats	Retrieves core device statistics including uptime and system metrics
getStatsRadio() async throws -> RadioStats	Retrieves radio statistics including RSSI, SNR, and transmission counts
getStatsPackets() async throws -> PacketStats	Retrieves packet statistics including sent, received, and dropped counts

Custom Variables

Method	Description
getCustomVars() async throws -> [String: String]	Retrieves all custom variables stored on the device
setCustomVar(key:value:) async throws	Sets a custom variable on the device (key max 32 bytes, value max 256 bytes)

Cryptographic Keys

Method	Description
exportPrivateKey() async throws -> Data	Exports the device's 32-byte private key (sensitive operation)
importPrivateKey(_:) async throws	Imports a 64-byte expanded private key, replacing the device's identity

Channels

Method	Description
getChannel(index:) async throws -> ChannelInfo	Retrieves configuration for a channel (index 0-15)
setChannel(index:name:secret:) async throws	Configures a channel with name and PSK secret data (16 bytes)
setChannel(index:name:secret:) async throws	Configures a channel with automatic secret derivation (accepts ChannelSecret, default: .deriveFromName)
setFloodScope(scopeKey:) async throws	Sets the flood scope using a raw 32-byte scope key
setFloodScope(_:) async throws	Sets the flood scope using a FloodScope enum

Signing

Method	Description
signStart() async throws -> Int	Begins a signing operation, returns maximum data size in bytes
signData(_:) async throws	Sends a data chunk for signing (typically up to 120 bytes)
signFinish(timeout:) async throws -> Data	Finalizes signing and retrieves the signature (default 3x timeout)
sign(_:chunkSize:timeout:) async throws -> Data	Signs data using the device's private key (handles complete workflow)

Control and Discovery

Method	Description
sendControlData(type:payload:) async throws	Sends control data to the mesh network
sendNodeDiscoverRequest(filter:prefixOnly:tag:since:) async throws -> UInt32	Sends a node discovery request, returns the tag for correlating responses
factoryReset() async throws	Performs a factory reset (irreversible, erases all data)

Remote Node Queries (Binary Protocol)

Method	Description
requestStatus(from:) async throws -> StatusResponse	Requests status from a remote node (accepts Data or Destination)
requestTelemetry(from:) async throws -> TelemetryResponse	Requests telemetry from a remote node (accepts Data or Destination)
requestMMA(from:start:end:) async throws -> MMAResponse	Requests Min-Max-Average data for a time range from a remote node
requestACL(from:) async throws -> ACLResponse	Requests the Access Control List from a remote node
requestNeighbours(from:count:offset:orderBy:pubkeyPrefixLength:) async throws -> NeighboursResponse	Requests neighbor list from a remote node with pagination
fetchAllNeighbours(from:orderBy:pubkeyPrefixLength:) async throws -> NeighboursResponse	Fetches complete neighbor table from a remote node with automatic pagination

---

MeshTransport (public, protocol)

File: MeshCore/Sources/MeshCore/Transport/MeshTransport.swift

Abstraction for underlying transport layers, enabling different implementations for production and testing. The protocol itself is not an actor, but implementations should be actors or otherwise thread-safe (conforming to Sendable).

public protocol MeshTransport: Sendable {
    var receivedData: AsyncStream<Data> { get async }
    var isConnected: Bool { get async }
    func connect() async throws
    func disconnect() async
    func send(_ data: Data) async throws
}

Implementations

Type	Description
BLETransport (public, actor)	CoreBluetooth-based transport for physical devices
WiFiTransport (public, actor)	Network framework-based transport for WiFi devices
MockTransport (public, actor)	Deterministic transport for unit testing

WiFi Transport Implementation

WiFi transport provides connection to MeshCore devices over TCP/IP networks.

File: MeshCore/Sources/MeshCore/Transport/WiFiTransport.swift

Connection Characteristics:

• Protocol: TCP over WiFi
• Port: Configurable (the MeshCore One app UI defaults to 5000)
• Timeout: 10 seconds (see WiFiTransport.connectionTimeout)
• Framing: Length-prefixed frames (see WiFiFrameCodec)
• Keep-Alive / Auto-Reconnect: Not implemented in WiFiTransport itself; higher layers can reconnect as needed

WiFi-Specific Behavior:

Aspect	Description
Throughput	Higher than BLE (~1KB/sec vs ~250 bytes/sec)
Latency	Higher than BLE (~100-200ms vs ~50-100ms)
Range	Longer than BLE (~100-300m vs ~10-50m)
Power	Constant power supply (not battery-dependent)
Discovery	Manual host/port configuration
Use Cases	Fixed installations, repeaters, room servers

WiFi vs BLE Transport Decision:

// Configure before connecting
let transport = WiFiTransport()
await transport.setConnectionInfo(host: host, port: port)
try await transport.connect()

Error Handling:

• connect() throws WiFiTransportError (e.g., .notConfigured, .connectionTimeout, .connectionFailed(...))
• send(_:) throws WiFiTransportError.notConnected / .sendFailed(...)

---

EventDispatcher (public, actor)

File: MeshCore/Sources/MeshCore/Events/EventDispatcher.swift

Broadcasts MeshEvents to multiple subscribers via AsyncStream. Manages event distribution from the session to all listeners. Uses bounded buffering (100 events) to prevent memory issues.

Methods

Method	Description
subscribe() -> AsyncStream<MeshEvent>	Returns a new unfiltered stream for receiving all events
subscribe(filter:) -> AsyncStream<MeshEvent>	Returns a filtered stream that only yields matching events
dispatch(_:)	Synchronously broadcasts an event to all subscribers (not async)

---

MeshEvent (public, enum)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Represents any event received from the device. Events are organized into categories.

Connection Lifecycle

Case	Payload	Description
.connectionStateChanged	ConnectionState	Connection state has changed

Command Responses

Case	Payload	Description
.ok	value: UInt32?	Command completed successfully
.error	code: UInt8?	Command failed with error

Device Information

Case	Payload	Description
.selfInfo	SelfInfo	Device self-information received
.deviceInfo	DeviceCapabilities	Device capabilities received
.battery	BatteryInfo	Battery status received
.currentTime	Date	Current device time received
.customVars	[String: String]	Custom variables received
.channelInfo	ChannelInfo	Channel configuration received
.statsCore	CoreStats	Core statistics received
.statsRadio	RadioStats	Radio statistics received
.statsPackets	PacketStats	Packet statistics received

Contact Management

Case	Payload	Description
.contactsStart	count: Int	Contact list transfer started
.contact	MeshContact	A contact was received
.contactsEnd	lastModified: Date	Contact list transfer completed
.newContact	MeshContact	A new contact was discovered
.contactURI	String	Contact URI was received

Messaging

Case	Payload	Description
.messageSent	MessageSentInfo	Message was queued for sending
.contactMessageReceived	ContactMessage	Direct message received from a contact
.channelMessageReceived	ChannelMessage	Channel broadcast message received
.noMoreMessages	-	No more messages waiting
.messagesWaiting	-	Messages are waiting to be fetched

Network Events

Case	Payload	Description
.advertisement	publicKey: Data	Advertisement received from a node
.pathUpdate	publicKey: Data	Routing path was updated
.acknowledgement	code: Data	Message delivery acknowledgement
.traceData	TraceInfo	Trace route data received
.pathResponse	PathInfo	Path discovery response

Authentication

Case	Payload	Description
.loginSuccess	LoginInfo	Login succeeded
.loginFailed	publicKeyPrefix: Data?	Login failed

Binary Protocol Responses

Case	Payload	Description
.statusResponse	StatusResponse	Status response from remote node
.telemetryResponse	TelemetryResponse	Telemetry response from remote node
.binaryResponse	tag: Data, data: Data	Generic binary protocol response
.mmaResponse	MMAResponse	Min/Max/Average telemetry response
.aclResponse	ACLResponse	Access control list response
.neighboursResponse	NeighboursResponse	Neighbours list response

Cryptographic Signing

Case	Payload	Description
.signStart	maxLength: Int	Signing session started
.signature	Data	Cryptographic signature generated
.disabled	reason: String	Feature is disabled

Raw Data and Logging

Case	Payload	Description
.rawData	RawDataInfo	Raw radio data received
.rxLogData	ParsedRxLogData	Emitted when low-level radio log data is successfully parsed into structured packet information
.logData	LogDataInfo	Emitted for diagnostic logs and malformed RX payloads that failed parsing
.controlData	ControlDataInfo	Control protocol data received
.discoverResponse	DiscoverResponse	Node discovery response

Key Management

Case	Payload	Description
.privateKey	Data	Private key was exported

Debug and Diagnostics

Case	Payload	Description
.parseFailure	data: Data, reason: String	Packet parsing failed

---

Models

MeshContact (public, struct)

File: MeshCore/Sources/MeshCore/Models/Contact.swift

Represents a contact in the mesh network.

Property	Type	Description
id	String	Unique identifier
publicKey	Data	32-byte public key
type	UInt8	Node type: 0=Chat, 1=Repeater, 2=Room
flags	UInt8	Contact flags
outPathLength	Int8	Hop count (-1 = flood)
outPath	Data	Routing information
advertisedName	String	Display name from advertisement
lastAdvertisement	Date	Last advertisement timestamp
latitude	Double	Location latitude
longitude	Double	Location longitude
lastModified	Date	Last modification timestamp

ContactMessage (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift:354

Represents a direct message from a contact.

Property	Type	Description
senderPublicKeyPrefix	Data	6-byte sender key prefix
pathLength	UInt8	Hop count
textType	UInt8	Message type (0=plain, 1=CLI, 2=signed)
senderTimestamp	Date	Sender's timestamp
signature	Data?	Optional message signature
text	String	Message content
snr	Double?	Signal-to-noise ratio

ChannelMessage (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift:403

Represents a message received on a channel.

Property	Type	Description
channelIndex	UInt8	Channel slot (0-7)
pathLength	UInt8	Hop count
textType	UInt8	Message type
senderTimestamp	Date	Sender's timestamp
text	String	Message content (format: "NodeName: text")
snr	Double?	Signal-to-noise ratio

---

Supporting Types

SessionConfiguration (public, struct)

File: MeshCore/Sources/MeshCore/Session/SessionConfiguration.swift

Configuration options for MeshCoreSession.

Property	Type	Default	Description
defaultTimeout	TimeInterval	5.0	Default timeout for operations
clientIdentifier	String	"MeshCore-Swift"	Client identifier string

OtherParamsConfig (public, struct)

File: MeshCore/Sources/MeshCore/Session/MeshCoreSession.swift

Configuration for device "other params" settings. Used by granular configuration setters to implement read-modify-write pattern.

Property	Type	Description
manualAddContacts	Bool	Whether contacts require manual approval
telemetryModeBase	UInt8	Base telemetry mode (0-3)
telemetryModeLocation	UInt8	Location telemetry mode (0-3)
telemetryModeEnvironment	UInt8	Environment telemetry mode (0-3)
advertisementLocationPolicy	UInt8	Location advertising policy
multiAcks	UInt8	Number of acknowledgment retries

MessageResult (public, enum)

File: MeshCore/Sources/MeshCore/Session/SessionConfiguration.swift

Result of a message fetch operation.

Case	Description
.contactMessage(ContactMessage)	A contact message was received
.channelMessage(ChannelMessage)	A channel message was received
.noMoreMessages	No more messages available in queue

Destination (public, enum)

File: MeshCore/Sources/MeshCore/Models/Destination.swift

Represents the destination for a message. Can be specified as raw data, hex string, or contact object.

Case	Payload	Description
.data(Data)	Raw bytes	Direct message using raw public key data
.hexString(String)	Hex string	Direct message using hex-encoded public key
.contact(MeshContact)	Contact object	Direct message to a contact

Methods:

• publicKey(prefixLength:) throws -> Data - Returns the public key prefix of specified length (default 6 bytes)
• fullPublicKey() throws -> Data - Returns the full 32-byte public key

FloodScope (public, enum)

File: MeshCore/Sources/MeshCore/Models/Destination.swift

Defines the scope for flood routing in the mesh network.

Case	Payload	Description
.disabled	-	Flood routing is disabled
.channelName(String)	Channel name	Scope derived from channel name hash
.rawKey(Data)	16-byte key	Scope using explicit key

Methods:

• scopeKey() -> Data - Generates a 16-byte scope key

ChannelSecret (public, enum)

File: MeshCore/Sources/MeshCore/Models/Destination.swift

Defines the secret used for channel encryption.

Case	Payload	Description
.explicit(Data)	16-byte secret	Explicit secret key
.deriveFromName	-	Secret derived from channel name

Methods:

• secretData(channelName:) -> Data - Generates 16-byte secret data

EventFilter (public, struct)

File: MeshCore/Sources/MeshCore/Events/EventFilter.swift

Provides type-safe event filtering for MeshEvent values. Use with EventDispatcher.subscribe(filter:) or waitForEvent(filter:timeout:).

Factory methods:

• .acknowledgement(code:) - Filter for specific acknowledgement codes
• .contactMessage(fromPrefix:) - Filter messages from a specific sender
• .channelMessage(channel:) - Filter messages on a specific channel
• .statusResponse(fromPrefix:) - Filter status responses from a node
• .telemetryResponse(fromPrefix:) - Filter telemetry responses from a node
• .advertisement(fromPrefix:) - Filter advertisements from a node
• .pathUpdate(forPrefix:) - Filter path updates for a node
• .ok - Filter for .ok responses
• .error - Filter for .error responses
• .noMoreMessages - Filter for no-more-messages events
• .messagesWaiting - Filter for messages-waiting events

Combinators:

• or(_:) - Combine with OR logic
• and(_:) - Combine with AND logic
• negated - Invert the filter

MeshCoreError (public, enum)

File: MeshCore/Sources/MeshCore/Session/SessionConfiguration.swift

Errors that can occur during mesh operations.

Case	Description
.timeout	Operation timed out
.deviceError(code: UInt8)	The device returned an error code
.parseError(String)	Failed to parse data from the device
.notConnected	The transport is not connected
.commandFailed(CommandCode, reason: String)	A command failed on the device
.invalidResponse(expected: String, got: String)	Received an unexpected response from the device
.contactNotFound(publicKeyPrefix: Data)	Could not find the specified contact
.dataTooLarge(maxSize: Int, actualSize: Int)	The data exceeds the device's maximum allowed size
.signingFailed(reason: String)	Cryptographic signing failed
.invalidInput(String)	Provided input is invalid
.unknown(String)	An unknown error occurred
.bluetoothUnavailable	Bluetooth is unavailable on this device
.bluetoothUnauthorized	App is not authorized to use Bluetooth
.bluetoothPoweredOff	Bluetooth is powered off
.connectionLost(underlying: Error?)	The connection was lost
.sessionNotStarted	The session has not been started

SelfInfo (public, struct)

File: MeshCore/Sources/MeshCore/Models/DeviceInfo.swift

Information about the local device, received after session start.

Property	Type	Description
advertisementType	UInt8	The type of advertisement used by the device
txPower	UInt8	The current transmit power level
maxTxPower	UInt8	The maximum supported transmit power level
publicKey	Data	The node's 32-byte public key
latitude	Double	The current latitude coordinate
longitude	Double	The current longitude coordinate
multiAcks	UInt8	Whether multiple acknowledgments are enabled
advertisementLocationPolicy	UInt8	The policy for location sharing in advertisements
telemetryModeEnvironment	UInt8	The environment telemetry reporting mode
telemetryModeLocation	UInt8	The location telemetry reporting mode
telemetryModeBase	UInt8	The base telemetry reporting mode
manualAddContacts	Bool	Whether contacts must be added manually
radioFrequency	Double	The radio center frequency in MHz
radioBandwidth	Double	The radio bandwidth in kHz
radioSpreadingFactor	UInt8	The radio spreading factor
radioCodingRate	UInt8	The radio coding rate
name	String	The user-defined name for this device

DeviceCapabilities (public, struct)

File: MeshCore/Sources/MeshCore/Models/DeviceInfo.swift

Hardware and firmware capabilities of the device.

Property	Type	Description
firmwareVersion	UInt8	Firmware version number
maxContacts	Int	Maximum contact storage
maxChannels	Int	Maximum channels supported
blePin	UInt32	BLE PIN code
firmwareBuild	String	Firmware build string
model	String	Hardware model identifier
version	String	Version string

BatteryInfo (public, struct)

File: MeshCore/Sources/MeshCore/Models/DeviceInfo.swift

Battery status information from the device.

Property	Type	Description
level	Int	Battery level in millivolts
usedStorageKB	Int?	Used storage in kilobytes
totalStorageKB	Int?	Total storage in kilobytes

MessageSentInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Information returned after successfully sending a message.

Property	Type	Description
type	UInt8	The type of the sent message
expectedAck	Data	Expected acknowledgment code for this message
suggestedTimeoutMs	UInt32	Suggested timeout in milliseconds for waiting for ACK

ChannelInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Configuration information for a broadcast channel.

Property	Type	Description
index	UInt8	Channel index (0-15)
name	String	Human-readable channel name
secret	Data	Secret key data for channel encryption

CoreStats (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Core device statistics from the local device.

Property	Type	Description
batteryMV	UInt16	Battery level in millivolts
uptimeSeconds	UInt32	Device uptime in seconds
errors	UInt16	Total error count
queueLength	UInt8	Current transmit queue length

RadioStats (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Radio statistics from the local device.

Property	Type	Description
noiseFloor	Int16	Noise floor in dBm
lastRSSI	Int8	Last received signal strength in dBm
lastSNR	Double	Last signal-to-noise ratio in dB
txAirtimeSeconds	UInt32	Total transmit airtime in seconds
rxAirtimeSeconds	UInt32	Total receive airtime in seconds

PacketStats (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Packet statistics from the local device.

Property	Type	Description
received	UInt32	Total packets received
sent	UInt32	Total packets sent
floodTx	UInt32	Total flood packets transmitted
directTx	UInt32	Total direct packets transmitted
floodRx	UInt32	Total flood packets received
directRx	UInt32	Total direct packets received

StatusResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Status response from a remote node via binary protocol.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of responding node
battery	Int	Battery level in millivolts
txQueueLength	Int	Current transmit queue length
noiseFloor	Int	Noise floor in dBm
lastRSSI	Int	Last RSSI in dBm
packetsReceived	UInt32	Total packets received
packetsSent	UInt32	Total packets sent
airtime	UInt32	Total TX airtime in seconds
uptime	UInt32	Node uptime in seconds
sentFlood	UInt32	Flood packets sent
sentDirect	UInt32	Direct packets sent
receivedFlood	UInt32	Flood packets received
receivedDirect	UInt32	Direct packets received
fullEvents	Int	Total full events recorded
lastSNR	Double	Last SNR in dB
directDuplicates	Int	Direct duplicates received
floodDuplicates	Int	Flood duplicates received
rxAirtime	UInt32	Total RX airtime in seconds

TelemetryResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Telemetry response from a remote node via binary protocol.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of responding node
tag	Data?	Optional correlation tag
rawData	Data	Raw telemetry data payload
dataPoints	[LPPDataPoint]	Parsed Cayenne LPP data points (computed property)

MMAResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Min-Max-Average response from a remote node.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of responding node
tag	Data	Correlation tag
data	[MMAEntry]	List of MMA entries

MMAEntry (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Single entry in MMA response data.

Property	Type	Description
channel	UInt8	Sensor channel
type	String	Data type
min	Double	Minimum value
max	Double	Maximum value
avg	Double	Average value

ACLResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Access Control List response from a remote node.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of responding node
tag	Data	Correlation tag
entries	[ACLEntry]	List of ACL entries

ACLEntry (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Single entry in ACL response data.

Property	Type	Description
keyPrefix	Data	Public key prefix affected by this ACL entry
permissions	UInt8	Permissions granted

NeighboursResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Neighbour list response from a remote node.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of responding node
tag	Data	Correlation tag
totalCount	Int	Total number of neighbours known to the node
neighbours	[Neighbour]	List of neighbours in this response

Neighbour (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Information about a neighbouring node.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of neighbour
secondsAgo	Int	Seconds since last seen
snr	Double	Signal-to-noise ratio of last communication

ConnectionState (public, enum)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Represents the current connection state of a MeshCore session.

Case	Payload	Description
.disconnected	-	Session is disconnected
.connecting	-	Session is attempting to connect
.connected	-	Session is successfully connected
.reconnecting	attempt: Int	Session is attempting to reconnect after failure
.failed	MeshTransportError	Connection failed with error

MeshTransportError (public, enum)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Errors that can occur at the transport layer.

Case	Payload	Description
.notConnected	-	Transport is not connected
.connectionFailed	String	Connection attempt failed with reason
.sendFailed	String	Sending data failed with reason
.deviceNotFound	-	Target device could not be found
.serviceNotFound	-	Required service not found on device
.characteristicNotFound	-	Required characteristic not found on device

TraceInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Trace route information received from the mesh network.

Property	Type	Description
tag	UInt32	Request correlation tag
authCode	UInt32	Authentication code for the trace request
flags	UInt8	Configuration flags for the trace
pathLength	UInt8	Length of the recorded path
path	[TraceNode]	List of nodes in the trace path

TraceNode (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

A node in a trace path.

Property	Type	Description
hash	UInt8?	Hash of the node's public key
snr	Double	Signal-to-noise ratio at this hop

PathInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Path discovery information.

Property	Type	Description
publicKeyPrefix	Data	Public key prefix of the destination node
outPath	Data	Outbound path data
inPath	Data	Inbound path data

LoginInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Login success information.

Property	Type	Description
permissions	UInt8	Permissions granted after login
isAdmin	Bool	Whether the user has administrator privileges
publicKeyPrefix	Data	Public key prefix of the node where login occurred

RawDataInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Raw data received from the device.

Property	Type	Description
snr	Double	Signal-to-noise ratio of the received packet
rssi	Int	Received signal strength indicator in dBm
payload	Data	Raw payload data

LogDataInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Log data received from the device.

Property	Type	Description
snr	Double?	Optional signal-to-noise ratio
rssi	Int?	Optional received signal strength indicator
payload	Data	Raw log payload data

ParsedRxLogData (public, struct)

File: MeshCore/Sources/MeshCore/Protocol/RxLogTypes.swift

Parsed RF packet data from rxLogData events.

Property	Type	Description
snr	Double?	SNR in dB (0.25 dB resolution)
rssi	Int?	RSSI in dBm
rawPayload	Data	Original unparsed payload bytes
routeType	RouteType	Routing method (flood, direct, tc_flood, tc_direct)
payloadType	PayloadType	Message type (header bits 2-5; values 12-15 map to .unknown)
payloadVersion	UInt8	Protocol version (0-3)
transportCode	Data?	4-byte transport code if route type requires it
pathLength	UInt8	Number of path nodes
pathNodes	[UInt8]	Path node identifiers (1 byte each) as emitted by firmware
packetPayload	Data	Payload after header/path extraction
packetHash	String	First 8 bytes of SHA-256 of packetPayload, as 16-char hex
senderPubkeyPrefix	Data?	6-byte sender pubkey for direct text messages

ControlDataInfo (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Control protocol data received from the device.

Property	Type	Description
snr	Double	Signal-to-noise ratio of the received packet
rssi	Int	Received signal strength indicator in dBm
pathLength	UInt8	Path length the control packet travelled
payloadType	UInt8	Type of control protocol payload
payload	Data	Raw payload data

DiscoverResponse (public, struct)

File: MeshCore/Sources/MeshCore/Events/MeshEvent.swift

Node discovery response.

Property	Type	Description
nodeType	UInt8	Type of the discovered node
snrIn	Double	Inbound signal-to-noise ratio
snr	Double	Signal-to-noise ratio
rssi	Int	Received signal strength indicator in dBm
pathLength	UInt8	Path length to the discovered node
tag	Data	Request correlation tag
publicKey	Data	Full public key of the discovered node

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Utilities

PacketBuilder (public, enum)

File: MeshCore/Sources/MeshCore/Protocol/PacketBuilder.swift

Stateless enum for constructing binary protocol packets.

PacketParser (public, enum)

File: MeshCore/Sources/MeshCore/Protocol/PacketParser.swift

Stateless enum for parsing binary protocol packets into MeshEvents.

LPPDecoder (public, enum)

File: MeshCore/Sources/MeshCore/LPP/LPPDecoder.swift

Decodes Cayenne Low Power Payload (LPP) telemetry data.

Method	Description
decode(_:) -> [LPPDataPoint]	Decodes raw LPP bytes into data points

LPPDataPoint (public, struct)

File: MeshCore/Sources/MeshCore/LPP/LPPDecoder.swift

Represents a single decoded LPP data point.

Property	Type	Description
channel	UInt8	Channel identifier (application-specific)
type	LPPSensorType	The sensor type
value	LPPValue	The decoded value

LPPSensorType (public, enum)

File: MeshCore/Sources/MeshCore/LPP/LPPDecoder.swift

Cayenne LPP sensor types. Includes temperature, humidity, barometer, voltage, gps, and many more.

LPPValue (public, enum)

File: MeshCore/Sources/MeshCore/LPP/LPPDecoder.swift

Decoded LPP sensor values.

Case	Payload	Description
.digital	Bool	Boolean value (digital I/O, presence, switch)
.integer	Int	Integer value (illuminance, percentage, direction)
.float	Double	Floating-point value
.vector3	x, y, z: Double	3D vector (accelerometer, gyrometer)
.gps	latitude, longitude, altitude: Double	GPS coordinates
.rgb	red, green, blue: UInt8	RGB colour
.timestamp	Date	Unix timestamp

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See Also

• Architecture Overview
• BLE Transport Guide
• WiFi Transport Guide
• Messaging Guide