Node / meshtastic / Meshtastic-Android / files / feature / firmware / src / commonMain / kotlin / org / meshtastic / feature / firmware / ota / BleScanSupport.kt

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T8b949e/*

* Copyright (c) 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.feature.firmware.ota

Tff7b72import T7ee787co.touchlab.kermit.Logger

Tff7b72import T7ee787kotlinx.coroutines.delay

Tff7b72import T7ee787kotlinx.coroutines.flow.firstOrNull

Tff7b72import T7ee787kotlinx.coroutines.flow.onEach

Tff7b72import T7ee787org.meshtastic.core.ble.BleDevice

Tff7b72import T7ee787org.meshtastic.core.ble.BleScanner

Tff7b72import T7ee787kotlin.time.Duration

Tff7b72import T7ee787kotlin.time.Duration.Companion.seconds

Tff7b72internal Tff7b72const Tff7b72val Te6edf3DEFAULT_SCAN_RETRY_COUNT Tff7b72= T79c0ff3

Tff7b72internal Tff7b72val Te6edf3DEFAULT_SCAN_RETRY_DELAYTb4b4b4: Te6edf3Duration Tff7b72= T79c0ff2.Te6edf3seconds

Tff7b72internal Tff7b72val Te6edf3DEFAULT_SCAN_TIMEOUTTb4b4b4: Te6edf3Duration Tff7b72= T79c0ff1T79c0ff0.Te6edf3seconds

Tff7b72private Tff7b72const Tff7b72val Te6edf3MAC_PARTS_COUNT Tff7b72= T79c0ff6

Tff7b72private Tff7b72const Tff7b72val Te6edf3HEX_RADIX Tff7b72= T79c0ff1T79c0ff6

Tff7b72private Tff7b72const Tff7b72val Te6edf3BYTE_MASK Tff7b72= T79c0ff0Te6edf3xFF

T8b949e/**

* Increment the last byte of a BLE MAC address by one.

*

* Both ESP32 (OTA) and nRF52 (DFU) devices advertise with the original MAC + 1 after rebooting into their respective

* firmware-update modes.

*/

Tf0883e@SuppressTb4b4b4(Ta5d6ff"Ta5d6ffReturnCountTa5d6ff"Tb4b4b4)

Tff7b72internal Tff7b72fun Td2a8ffcalculateMacPlusOneTb4b4b4(Te6edf3macAddressTb4b4b4: Tffa657StringTb4b4b4)Tb4b4b4: Tffa657String Tb4b4b4{

Tff7b72val Te6edf3parts Tff7b72= Te6edf3macAddressTb4b4b4.Te6edf3splitTb4b4b4(Ta5d6ff"Ta5d6ff:Ta5d6ff"Tb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3partsTb4b4b4.Te6edf3size Tff7b72!Tff7b72= Te6edf3MAC_PARTS_COUNTTb4b4b4) Tff7b72return Te6edf3macAddress

Tff7b72val Te6edf3lastByte Tff7b72= Te6edf3partsTff7b72[Te6edf3MAC_PARTS_COUNT Tff7b72- T79c0ff1Tff7b72]Tb4b4b4.Te6edf3toIntOrNullTb4b4b4(Te6edf3HEX_RADIXTb4b4b4) Tff7b72?: Tff7b72return Te6edf3macAddress

Tff7b72val Te6edf3incremented Tff7b72= Tb4b4b4(Tb4b4b4(Te6edf3lastByte Tff7b72+ T79c0ff1Tb4b4b4) Te6edf3and Te6edf3BYTE_MASKTb4b4b4)Tb4b4b4.Te6edf3toStringTb4b4b4(Te6edf3HEX_RADIXTb4b4b4)Tb4b4b4.Te6edf3uppercaseTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3padStartTb4b4b4(T79c0ff2Tb4b4b4, Ta5d6ff'0'Tb4b4b4)

Tff7b72return Ta5d6ff"Tffd700${Te6edf3partsTb4b4b4.Te6edf3takeTb4b4b4(Te6edf3MAC_PARTS_COUNT Tff7b72- T79c0ff1Tb4b4b4)Tb4b4b4.Te6edf3joinToStringTb4b4b4(Ta5d6ff"Tb4b4b4:Ta5d6ff"Tb4b4b4)Tffd700}Ta5d6ff:Tffd700$Te6edf3incrementedTa5d6ff"

Tb4b4b4}

T8b949e/**

* Scan for a BLE device matching [predicate] with retry logic.

*

* Shared by both [BleOtaTransport] and

* [SecureDfuTransport][org.meshtastic.feature.firmware.ota.dfu.SecureDfuTransport].

*/

Tff7b72internal Tff7b72suspend Tff7b72fun Td2a8ffscanForBleDeviceTb4b4b4(

Te6edf3scannerTb4b4b4: Te6edf3BleScannerTb4b4b4,

Te6edf3tagTb4b4b4: Tffa657StringTb4b4b4,

Te6edf3serviceUuidTb4b4b4: Te6edf3kotlinTb4b4b4.Te6edf3uuidTb4b4b4.Te6edf3UuidTb4b4b4,

Te6edf3retryCountTb4b4b4: Tffa657Int Tff7b72= Te6edf3DEFAULT_SCAN_RETRY_COUNTTb4b4b4,

Te6edf3retryDelayTb4b4b4: Te6edf3Duration Tff7b72= Te6edf3DEFAULT_SCAN_RETRY_DELAYTb4b4b4,

Te6edf3scanTimeoutTb4b4b4: Te6edf3Duration Tff7b72= Te6edf3DEFAULT_SCAN_TIMEOUTTb4b4b4,

Te6edf3predicateTb4b4b4: Tb4b4b4(Te6edf3BleDeviceTb4b4b4) Tff7b72-Tff7b72> Tffa657BooleanTb4b4b4,

Tb4b4b4)Tb4b4b4: Te6edf3BleDevice? Tb4b4b4{

Te6edf3repeatTb4b4b4(Te6edf3retryCountTb4b4b4) Tb4b4b4{ Te6edf3attempt Tff7b72-Tff7b72>

Te6edf3LoggerTb4b4b4.Te6edf3d Tb4b4b4{ Ta5d6ff"Tffd700$Te6edf3tagTa5d6ff: Scan attempt Tffd700${Te6edf3attempt Tff7b72+ T79c0ff1Tffd700}Ta5d6ff/Tffd700$Te6edf3retryCountTa5d6ff" Tb4b4b4}

Tff7b72val Te6edf3foundDevices Tff7b72= Te6edf3mutableSetOfTff7b72<Tffa657StringTff7b72>Tb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3device Tff7b72=

Te6edf3scanner

Tb4b4b4.Te6edf3scanTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3scanTimeoutTb4b4b4, Te6edf3serviceUuid Tff7b72= Te6edf3serviceUuidTb4b4b4)

Tb4b4b4.Te6edf3onEach Tb4b4b4{ Te6edf3d Tff7b72-Tff7b72>

Tff7b72if Tb4b4b4(Te6edf3foundDevicesTb4b4b4.Te6edf3addTb4b4b4(Te6edf3dTb4b4b4.Te6edf3addressTb4b4b4)Tb4b4b4) Tb4b4b4{

Te6edf3LoggerTb4b4b4.Te6edf3d Tb4b4b4{ Ta5d6ff"Tffd700$Te6edf3tagTa5d6ff: Scan found device: Tffd700${Te6edf3dTb4b4b4.Te6edf3addressTffd700}Ta5d6ff (name=Tffd700${Te6edf3dTb4b4b4.Te6edf3nameTffd700}Ta5d6ff)Ta5d6ff" Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4.Te6edf3firstOrNullTb4b4b4(Te6edf3predicateTb4b4b4)

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

Te6edf3LoggerTb4b4b4.Te6edf3i Tb4b4b4{ Ta5d6ff"Tffd700$Te6edf3tagTa5d6ff: Found target device at Tffd700${Te6edf3deviceTb4b4b4.Te6edf3addressTffd700}Ta5d6ff" Tb4b4b4}

Tff7b72return Te6edf3device

Tb4b4b4}

Te6edf3LoggerTb4b4b4.Te6edf3w Tb4b4b4{ Ta5d6ff"Tffd700$Te6edf3tagTa5d6ff: Target not in Tffd700${Te6edf3foundDevicesTb4b4b4.Te6edf3sizeTffd700}Ta5d6ff devices foundTa5d6ff" Tb4b4b4}

Tff7b72if Tb4b4b4(Te6edf3attempt Tff7b72< Te6edf3retryCount Tff7b72- T79c0ff1Tb4b4b4) Te6edf3delayTb4b4b4(Te6edf3retryDelayTb4b4b4)

Tb4b4b4}

Tff7b72return Tff7b72null

Tb4b4b4}