Node / meshtastic / Meshtastic-Android / files / core / network / src / androidMain / kotlin / org / meshtastic / core / network / radio / SerialRadioTransport.kt

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T8b949e/*

* Copyright (c) 2025-2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.core.network.radio

Tff7b72import T7ee787co.touchlab.kermit.Logger

Tff7b72import T7ee787kotlinx.coroutines.CoroutineScope

Tff7b72import T7ee787org.meshtastic.core.common.util.handledLaunch

Tff7b72import T7ee787org.meshtastic.core.common.util.nowMillis

Tff7b72import T7ee787org.meshtastic.core.network.repository.SerialConnection

Tff7b72import T7ee787org.meshtastic.core.network.repository.SerialConnectionListener

Tff7b72import T7ee787org.meshtastic.core.network.repository.UsbRepository

Tff7b72import T7ee787org.meshtastic.core.network.transport.HeartbeatSender

Tff7b72import T7ee787org.meshtastic.core.repository.RadioTransportCallback

Tff7b72import T7ee787java.util.concurrent.atomic.AtomicReference

T8b949e/** An Android USB/serial [RadioTransport] implementation. */

Tff7b72class T56d364SerialRadioTransportTb4b4b4(

Te6edf3callbackTb4b4b4: Te6edf3RadioTransportCallbackTb4b4b4,

Te6edf3scopeTb4b4b4: Te6edf3CoroutineScopeTb4b4b4,

Tff7b72private Tff7b72val Te6edf3usbRepositoryTb4b4b4: Te6edf3UsbRepositoryTb4b4b4,

Tff7b72private Tff7b72val Te6edf3addressTb4b4b4: Tffa657StringTb4b4b4,

Tb4b4b4) Tb4b4b4: Te6edf3StreamTransportTb4b4b4(Te6edf3callbackTb4b4b4, Te6edf3scopeTb4b4b4) Tb4b4b4{

Tff7b72private Tff7b72var Te6edf3connRef Tff7b72= Te6edf3AtomicReferenceTff7b72<Te6edf3SerialConnection?Tff7b72>Tb4b4b4(Tb4b4b4)

Tff7b72private Tff7b72val Te6edf3heartbeatSender Tff7b72= Te6edf3HeartbeatSenderTb4b4b4(Te6edf3sendToRadio Tff7b72= Tff7b72::Te6edf3handleSendToRadioTb4b4b4, Te6edf3logTag Tff7b72= Ta5d6ff"Ta5d6ffSerial[Tffd700$Te6edf3addressTa5d6ff]Ta5d6ff"Tb4b4b4)

Tff7b72override Tff7b72fun Td2a8ffstartTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3connectTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffonDeviceDisconnectTb4b4b4(Te6edf3waitForStoppedTb4b4b4: Tffa657BooleanTb4b4b4, Te6edf3isPermanentTb4b4b4: Tffa657BooleanTb4b4b4) Tb4b4b4{

Te6edf3connRefTb4b4b4.Te6edf3getTb4b4b4(Tb4b4b4)Tff7b72?.Te6edf3closeTb4b4b4(Te6edf3waitForStoppedTb4b4b4)

Tff7b72superTb4b4b4.Te6edf3onDeviceDisconnectTb4b4b4(Te6edf3waitForStoppedTb4b4b4, Te6edf3isPermanentTb4b4b4)

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffconnectTb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3deviceMap Tff7b72= Te6edf3usbRepositoryTb4b4b4.Te6edf3serialDevicesTb4b4b4.Te6edf3value

Tff7b72val Te6edf3device Tff7b72= Te6edf3deviceMapTff7b72[Te6edf3addressTff7b72] Tff7b72?: Te6edf3deviceMapTb4b4b4.Te6edf3valuesTb4b4b4.Te6edf3firstOrNullTb4b4b4(Tb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3device Tff7b72=Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3e Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial device not found at addressTa5d6ff" Tb4b4b4}

Tb4b4b4} Tff7b72else Tb4b4b4{

Tff7b72val Te6edf3connectStart Tff7b72= Te6edf3nowMillis

Te6edf3LoggerTb4b4b4.Te6edf3i Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Opening serial device: Tffd700$Te6edf3deviceTa5d6ff" Tb4b4b4}

Tff7b72var Te6edf3packetsReceived Tff7b72= T79c0ff0

Tff7b72var Te6edf3bytesReceived Tff7b72= T79c0ff0L

Tff7b72var Te6edf3connectionStartTime Tff7b72= T79c0ff0L

Tff7b72val Te6edf3onConnectTb4b4b4: Tb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657Unit Tff7b72= Tb4b4b4{

Te6edf3connectionStartTime Tff7b72= Te6edf3nowMillis

Tff7b72val Te6edf3connectionTime Tff7b72= Te6edf3connectionStartTime Tff7b72- Te6edf3connectStart

Te6edf3LoggerTb4b4b4.Te6edf3i Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial device connected in Tffd700${Te6edf3connectionTimeTffd700}Ta5d6ffmsTa5d6ff" Tb4b4b4}

Tff7b72superTb4b4b4.Te6edf3connectTb4b4b4(Tb4b4b4)

Tb4b4b4}

Te6edf3usbRepository

Tb4b4b4.Te6edf3createSerialConnectionTb4b4b4(

Te6edf3deviceTb4b4b4,

Tff7b72object Tb4b4b4: T56d364SerialConnectionListener Tb4b4b4{

Tff7b72override Tff7b72fun Td2a8ffonMissingPermissionTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3e Tb4b4b4{

Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial connection failed - missing USB permissions for device: Tffd700$Te6edf3deviceTa5d6ff"

Tb4b4b4}

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffonConnectedTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3onConnectTb4b4b4.Te6edf3invokeTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffonDataReceivedTb4b4b4(Te6edf3bytesTb4b4b4: Te6edf3ByteArrayTb4b4b4) Tb4b4b4{

Te6edf3packetsReceivedTff7b72+Tff7b72+

Te6edf3bytesReceived Tff7b72+Tff7b72= Te6edf3bytesTb4b4b4.Te6edf3size

Te6edf3LoggerTb4b4b4.Te6edf3d Tb4b4b4{

Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial received packet #Tffd700$Te6edf3packetsReceivedTa5d6ff - Ta5d6ff" Tff7b72+

Ta5d6ff"Tffd700${Te6edf3bytesTb4b4b4.Te6edf3sizeTffd700}Ta5d6ff byte(s) (Total RX: Tffd700$Te6edf3bytesReceivedTa5d6ff bytes)Ta5d6ff"

Tb4b4b4}

Te6edf3bytesTb4b4b4.Te6edf3forEachTb4b4b4(Tff7b72::Te6edf3readCharTb4b4b4)

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffonDisconnectedTb4b4b4(Te6edf3thrownTb4b4b4: Te6edf3Exception?Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3uptime Tff7b72=

Tff7b72if Tb4b4b4(Te6edf3connectionStartTime Tff7b72> T79c0ff0Tb4b4b4) Tb4b4b4{

Te6edf3nowMillis Tff7b72- Te6edf3connectionStartTime

Tb4b4b4} Tff7b72else Tb4b4b4{

T79c0ff0

Tb4b4b4}

Te6edf3thrownTff7b72?.Te6edf3let Tb4b4b4{ Te6edf3e Tff7b72-Tff7b72>

T8b949e// USB errors are common when unplugging; log as warning to avoid Crashlytics noise

Te6edf3LoggerTb4b4b4.Te6edf3wTb4b4b4(Te6edf3eTb4b4b4) Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial error after Tffd700${Te6edf3uptimeTffd700}Ta5d6ffms: Tffd700${Te6edf3eTb4b4b4.Te6edf3messageTffd700}Ta5d6ff" Tb4b4b4}

Tb4b4b4}

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{

Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial device disconnected - Ta5d6ff" Tff7b72+

Ta5d6ff"Ta5d6ffDevice: Tffd700$Te6edf3deviceTa5d6ff, Ta5d6ff" Tff7b72+

Ta5d6ff"Ta5d6ffUptime: Tffd700${Te6edf3uptimeTffd700}Ta5d6ffms, Ta5d6ff" Tff7b72+

Ta5d6ff"Ta5d6ffPackets RX: Tffd700$Te6edf3packetsReceivedTa5d6ff (Tffd700$Te6edf3bytesReceivedTa5d6ff bytes)Ta5d6ff"

Tb4b4b4}

Te6edf3onDeviceDisconnectTb4b4b4(Tff7b72falseTb4b4b4)

Tb4b4b4}

Tb4b4b4}Tb4b4b4,

Tb4b4b4)

Tb4b4b4.Te6edf3also Tb4b4b4{ Te6edf3conn Tff7b72-Tff7b72>

Te6edf3connRefTb4b4b4.Te6edf3setTb4b4b4(Te6edf3connTb4b4b4)

Te6edf3connTb4b4b4.Te6edf3connectTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffkeepAliveTb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// Delegate to HeartbeatSender which sends a ToRadio heartbeat to prove the serial

T8b949e// link is alive and keep the local node's lastHeard timestamp current.

Te6edf3scopeTb4b4b4.Te6edf3handledLaunch Tb4b4b4{ Te6edf3heartbeatSenderTb4b4b4.Te6edf3sendHeartbeatTb4b4b4(Tb4b4b4) Tb4b4b4}

Tb4b4b4}

Tff7b72override Tff7b72fun Td2a8ffsendBytesTb4b4b4(Te6edf3pTb4b4b4: Te6edf3ByteArrayTb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3conn Tff7b72= Te6edf3connRefTb4b4b4.Te6edf3getTb4b4b4(Tb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3conn Tff7b72!Tff7b72= Tff7b72nullTb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3d Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial sending Tffd700${Te6edf3pTb4b4b4.Te6edf3sizeTffd700}Ta5d6ff bytesTa5d6ff" Tb4b4b4}

Te6edf3connTb4b4b4.Te6edf3sendBytesTb4b4b4(Te6edf3pTb4b4b4)

Tb4b4b4} Tff7b72else Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Ta5d6ff[Tffd700$Te6edf3addressTa5d6ff] Serial connection not available, cannot send Tffd700${Te6edf3pTb4b4b4.Te6edf3sizeTffd700}Ta5d6ff bytesTa5d6ff" Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}