v4.2.0 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 4.2.0 LTS is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on September 26th, 2023

Note: This is a Release and may be used for production. This is the third Release in the Device OS release 4.x line (LTS) with critical bugfixes and backports from 5.x release line

To learn more about LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

4.2.0

ENHANCEMENTS

• [Cellular] Enables UPSV=1 low power mode for R510 when idle for >=9.2s #2674
• [services] add long long support to printf/scanf #2694 #2696
• [wiring] Add 64-bit String conversions #2693 #2657
• [wiring] json: 64-bit support #2695 #2657

BUGFIXES

• Fixes clean target for applications with large number of files + P2 PSRAM size calculation issues #2661
• [gen3] hal: fixes the issue that UARTE RX may lose data #2698
• [quectel] Fixes ncp-client not waiting for modem ready on cold boot #2700

INTERNAL

• [bootloader] remove nanopb dependency #2607
• test] resolve sleep20 test failures. #2669
• [nrf] Add Factory Reset Tests #2662
• Update the key used for validating the ServerMoved signature #2688
• [ci] fix macos builds #2683

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v4.2.0/particle_device-os@4.2.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.5.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2)

Device OS 5.5.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2).

Released on August 31, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.5.0

FEATURES

• Asset OTA #2668
• [M SoM] Platform support #2681
• [rtl872x] Experimental WPA3 support #2673
• [WiFi] Hidden SSID support #2673
• [rtl872x] GPIO drive strength configuration support #2680

ENHANCEMENTS

• [WiFi] WiFI interface power state notifications #2669
• [rtl872x] Improve SPI1 (P2 / Tracker M) and SPI (M SoM) behavior at 50MHz by changing RXD sample delay #2677
• [rtl872x] Improve USB Serial TX performance #2672
• [Cellular] Enables UPSV=1 low power mode for R510 when idle for >=9.2s #2674
• [rtl872x] Fix logic level overshoot on SPI, I2C, PWM pins #2680
• [rtl872x] Revert the QSPI flash speed to 80MHz #2684
• Update the key used for validating the ServerMoved signature #2688
• [rtl872x] remove the delay in UART flush() #2686

BUGFIXES

• [rtl872x] Fix incorrect I2C read timeout #2671
• [rtl872x] Do not initialize RTC after waking up from HIBERNATE sleep #2667
• [rtl872x] Disable pull resistors when pin is configure as OUTPUT #2666
• [rtl872x] Disable SWDIO/SWDCLK pins when going into sleep #2666
• [rtl872x] Disable brown-out detector #2679
• [rtl872x] Avoid glitch on I2C pins when reconfiguring I2C peripheral #2682
• [msom] Fix ethernet cs, reset, interrupt GPIO pins for M2 eval #2690

INTERNAL

• [WiFi] Resolve wiring/sleep20 test failures #2669
• [nrf52840] Add factory reset test (ota/factory_reset) #2662

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.5.0/particle_device-os@5.5.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.5.0-rc.1 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2)

Device OS 5.5.0-rc.1 Release Candidate is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/M SoM/P2).

Released on August 16th, 2023

Note: This is a Release Candidate and is not intended for production yet.

This is a Release Candidate on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.5.0-rc.1

FEATURES

• Asset OTA #2668
• [M SoM] Platform support #2681
• [rtl872x] Experimental WPA3 support #2673
• [WiFi] Hidden SSID support #2673
• [rtl872x] GPIO drive strength configuration support #2680

ENHANCEMENTS

• [WiFi] WiFI interface power state notifications #2669
• [rtl872x] Improve SPI1 (P2 / Tracker M) and SPI (M SoM) behavior at 50MHz by changing RXD sample delay #2677
• [rtl872x] Improve USB Serial TX performance #2672
• [Cellular] Enables UPSV=1 low power mode for R510 when idle for >=9.2s #2674
• [rtl872x] Fix logic level overshoot on SPI, I2C, PWM pins #2680
• [rtl872x] Revert the QSPI flash speed to 80MHz #2684

BUGFIXES

• [rtl872x] Fix incorrect I2C read timeout #2671
• [rtl872x] Do not initialize RTC after waking up from HIBERNATE sleep #2667
• [rtl872x] Disable pull resistors when pin is configure as OUTPUT #2666
• [rtl872x] Disable SWDIO/SWDCLK pins when going into sleep #2666
• [rtl872x] Disable brown-out detector #2679
• [rtl872x] Avoid glitch on I2C pins when reconfiguring I2C peripheral #2682

INTERNAL

• [WiFi] Resolve wiring/sleep20 test failures #2669
• [nrf52840] Add factory reset test (ota/factory_reset) #2662

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.5.0-rc.1/particle_device-os@5.5.0-rc.1.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.4.1 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.4.1 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on July 20, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.4.1

ENHANCEMENTS

• [rtl872x] dynamically enable Wi-Fi stack on demand #2664

BUGFIXES

• [rtl872x] linker: stop relying on .dynalib + .psram_text being contiguous and properly and similarly aligned within LMA and VMA, just copy them separately #2665
• [rtl872x] fix BLE race condition #2664

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.4.1/particle_device-os@5.4.1.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.4.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.4.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on June 16, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.4.0

ENHANCEMENTS

• [rtl872x] USB HID Mouse/Keyboard support #2659

BUGFIXES

• Fix/nanopb string max size #2657
• Fixes clean target for applications with large number of files + P2 PSRAM size calculation issues #2661

INTERNAL

• [rtl872x] Allow KM4 SDK Bootloader images to boot #2656
• [rtl872x] Combined MFG firmware #2658

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.4.0/particle_device-os@5.4.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v4.1.0 (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X)

Device OS 4.1.0 LTS is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/E SoM X).

Released on May 31st, 2023

Note: This is a Release and may be used for production. This is the third Release in the Device OS release 4.x line (LTS) with critical bugfixes and backports from 5.x release line

To learn more about LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

4.1.0

FEATURES

• Hardware watchdog #2595 #2626
• Server key rotation #2570

BUGFIXES

• Wi-Fi/cellular network manager bugfixes #2621
• [nRF52] UART sleep/wakeup #2652
• [nRF52] watchdog timeout is not accurate #2635
• [nRF52] BLE plus RTC sleep causes hardfault #2615
• Fix inconsistent BLE state issue #2629
• [wiring][gen3] Allow gen3 to select internal ADC reference source #2619
• System setup and BLE threading improvements #2587
• [quectel] Account for "eMTC" type while obtaining signal values #2589
• Fix i2c hal deadlock #2572
• [r510] enable PS (packet switched) Only mode for R510 modems (Boron/BSoM/ESoMX) #2640 See TAN012

INTERNAL

• [test] turn off NCP before testing wiring/watchdog #2627
• [test] Remove manual wakeup. Hibernate + watchdog on platforms that support it #2620
• [test] add more watchdog test cases #2617
• [test] mailbox support and support for resets within tests #2611
• [test] Move no_fixture_i2c to correct dir and symlink to integration/wiring #2558
• [test] Fix listening mode tests #2534
• [test] Ensure thread07 test executes as intended #2622
• Protobuf defs refactor / fixes submessage encoding after nanopb 0.4.5 upgrade #2578
• Update nanopb to 0.4.5 #2563

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v4.1.0/particle_device-os@4.1.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.3.2 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.3.2 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on May 18, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.3.2

ENHANCEMENTS

• [rtl872x] SPI and GPIO HAL changes to support Neopixel #2654
• [rtl872x] Implement WiFi.selectAntenna #2651

BUGFIXES

• [nRF52] UART sleep/wakeup #2652
• [rtl872x] Fix Wifi stack issues #2649
• [rtl872x] BLE scanning panic #2650

INTERNAL

• [rtl872x] Fix burnin GPIO and SPI Flash tests for photon 2 #2653

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.3.2/particle_device-os@5.3.2.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.3.1 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.3.1 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on April 13, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.3.1

ENHANCEMENTS

• [rtl872x] Adds Wiring API System.backupRamSync() to manually backup retained variables #2633

BUGFIXES

• [rtl872x] Fix problems waking from sleep mode #2647
• Fixes inconsistent BLE state issues #2629
• [rtl872x] Fixes pmic shared interrupt and usb detection #2630
• [rtl872x] Fixes D7 configuration when exiting hibernate mode #2631
• [rtl872x][bootloader] Fixes USB serial port not being connectable on AMD based Windows #2625#2638
• [rtl872x] Fixes retained variables not being saved, now periodically saved every 10s #2633#2642#2644
• [rtl872x] Fixes assertion failure waiting for connection events from the stack when BLE.connect() called #2636
• [nRF52] Fixes watchdog timer reload value accuracy #2635
• [rtl872x] hal: Fixes BLE notifying multiple times #2637
• [r510] Enables PS (packet switched) only mode for R510 modems (Boron/BSoM/ESoMX) #2639#2645
• [rtl872x] hal: Fixes I2C failing to read/write from/to slave device #2634
• [p2] fixes SPI speed settings, and improves SPI DMA timing for larger transfers #2641
• [rtl872x] hal: uart may deadlock on initialization #2643
• [rtl872x] Dont enable usart RX/TX pullups#2646

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.3.1/particle_device-os@5.3.1.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.3.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.3.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on February 21, 2023

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.3.0

FEATURES

• Static IP configuration support #2621
• Hardware watchdog #2595#2617#2620
• Ethernet GPIO config #2616
• [wiring][gen3] Allow gen3 to select internal ADC reference source #2619

ENHANCEMENTS

• [rtl872x] Support IO wakeup sources through IO expander.#2604#2608#2614

BUGFIXES

• [rtl872x] enable factory reset feature #2612
• [rtl872x] Dcache fixes for exflash HAL #2623
• [rtl872x] fix overflow error in HAL_Delay_Microseconds #2606
• [nRF52] BLE plus RTC sleep causes hardfault #2615
• [rtl872x] hal: fix heap allocation issue in interrupt hal and postpone the mode button initialization. #2624
• [rtl872x] bootloader: fix destination address flash page alignment in case of compressed modules #2628

INTERNAL

• [photon2] Update FQC test with photon 2 pinout #2610
• [test] mailbox support and support for resets within tests #2611
• [bootloader] remove nanopb dependency#2607
• Server key rotation #2570
• Fix GCC platform build #2613#2618
• Ensure thread07 test executes as intended #2622
• [rtl872x] Fix watchdog tests; system/application thread stack size increase #2626
• [test] turn off NCP before testing wiring/watchdog #2627

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.3.0/particle_device-os@5.3.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

v5.2.0 (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2)

Device OS 5.2.0 Release is available in the Web IDE, Particle CLI and Workbench for (Argon/Boron/B SoM/B5 SoM/Tracker/Tracker M/E SoM X/P2).

Released on December 19, 2022

Note: This is a Release and may be used for production.

This is a release on non-LTS feature development branch (5.x). To learn more about our new LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.

Gen 3 256KB application binary support

Device OS v3.1.x and further releases bring support for 256KB application binaries to all Gen 3 platforms (at that time: Argon, Boron, B SoM, B5 SoM, Tracker). A few important aspects of this change:

1. Compatibility with 128KB applications built with < Device OS 3.1 versions is maintained. Devices can still run them even if other parts have been upgraded to Device OS 3.1+.
2. Upgrade process OTA (including product-based upgrades) is transparent.
3. When upgrading locally (using DFU or Serial), make sure to update the bootloader first, as it has some logic managing compatibility between 128KB and 256KB application types. See this page on steps how to perform the update.
4. If using standalone Particle CLI installation, make sure it's updated to >= 2.12.0 version, which includes support for 256KB applications.

---

5.2.0

FEATURES

• Initial support for BG95-M6 modem #2555

ENHANCEMENTS

• [TrackerM] Collect cellular properties with system info #2602
• [rtl872x] fixes System.ticks() #2600
• System setup and BLE threading improvements #2587
• [rtl872x] [freertos] [experimental] multi-step priority disinheritance #2581
• [rtl872x] sleep improvements #2586
• [rtl872x] fixes pinResetFast clearing too many pins and improves speed #2582
• [rtl872x] prebootloader: enable BOR with lowest available thresholds #2569

BUGFIXES

• [rtl872x] Fix USART/DMA deadlock #2603
• [rtl872x] Free memory from rtl sdk in SystemISRTaskQueue #2599
• [rtl872x] exflash: revert dcache invalidate calls after writes/erasures #2598
• [rtl872x] Fixes a deadlock when requiring to enable RSIP #2596
• [gen3] Use OTP Feature flag to change ADC reference source #2597
• [rtl872x] hal: remove an assert in read()/peek() and instead adjust read/peek size #2594
• [boron]Use the internal ADC reference on BRN404X #2588
• [p2] Fixes the conflict between Flash API and XIP #2561
• [Quectel] Account for "eMTC" type while obtaining signal values #2589
• [Boron / B SoM] R410 PPP crash in network phase workaround #2571
• [Cellular] R410 initialization SIM failure workaround #2573
• [gen3] [p2] Fix i2c hal deadlock #2572
• [TrackerM] Prevent connection over wifi when configured in SCAN_ONLY mode #2567
• [p2] WiFi bugfixes #2562
• [tracker/trackerm] Fix acquireWireBuffer for platforms where system initializes I2C before user app 2551
• [rtl872x] BLE Central connection failure when peer disconnects #2552

INTERNAL

• [test] Use compatible pins for PWM tests on TrackerM #2592
• [test] bump fastpin max limit to 10% #2591
• [test] Add thresholds for trackerM for slo tests #2590
• [test] Modify pins for trackerM spix tests #2585
• [trackerm] TrackerM EVT v0.0.3 pinmap update #2580
• Allow setting the ICCID of a virtual device #2583
• Protobuf defs refactor / fixes submessage encoding after nanopb 0.4.5 upgrade #2578
• Update nanopb to 0.4.5 #2563
• Fix no_fixture_i2c for esomx,boron,bsom platforms #2559
• [CI] fixes #2564
• Move no_fixture_i2c to correct dir and symlink to integration/wiring #2558
• [trackerm] TrackerM EVT v0.0.2 pinmap update #2550
• Increase timeouts for internal CI builds on windows #2545

---

System Binaries (all devices)

https://github.com/particle-iot/device-os/releases/download/v5.2.0/particle_device-os@5.2.0.zip

---

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.