> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/rev-hardware-client/home/rev-hardware-client-overview/changelog.md). # Changelog ### Version 1.7.6 * Add banner about RHC2 ### Version 1.7.5 * rerelease of 1.7.4 with correct binaries ### Version 1.7.4 * Correct label for voltage ramp rate * Fix overflow scrolling for some views that ### Version 1.7.3 * Display warning on Servo Hub device page when Servo Hub is in rs-485 mode. ### Version 1.7.2 * Add dropdown for configuring port disabled behavior to Servo Hub hardware page ### Version 1.7.1 #### General improvements * Fixes viewing and installing software when offline * Improves the reliability of loading data from CAN devices * Adds a "Forget REV USB Devices" button to the "Don't see your device?" page * This button will prompt for administrator privileges, tell Windows to forget REV USB devices, and restart the REV Hardware Client * You will have to disconnect and reconnect all REV USB devices for them to show up again * This may not affect all types of REV USB devices, such as Control Hubs and Driver Hubs. #### SPARK improvements * Fixes persisting parameters on SPARK motor controllers in follower mode ### Version 1.7.0 #### Breaking Changes * The standard REV Hardware Client installer no longer bundles device software files that are under 5MB * If you need an installer that has device software bundled into it, download one of the offline installers linked at [https://docs.revrobotics.com/rev-hardware-client](/rev-hardware-client/home/rev-hardware-client-overview.md) * Once a REV Hardware Client instance starts controlling a SPARK motor controller, no other REV Hardware Client instance connected to the same bus can control a SPARK motor controller until the first instance exits * The "Follow SPARK Using Preset" feature has been removed, in favor of simpler follower mode parameters in SPARK firmware version 25 and later * The "Burn Flash" button for SPARK motor controllers has been renamed to "Persist Parameters" to match the 2025 version of REVLib * The SPARK parameter `kSensorType` is no longer automatically-updated when the `kMotorType` parameter is changed * This only impacts SPARK firmware versions prior to 25.0.0, as the `kSensorType` parameter has been removed from later versions * The MAXSwerve Utility now requires SPARK firmware version 25.0.0 or later #### General Improvements * Fixes issue where the installer could cause the computer to reboot unexpectedly * Improves the reliability of displaying and using devices on a high-traffic CAN bus * Fixes a performance regression in the 2025 beta release that affected CAN communication * Stops the Telemetry tab from breaking after a device that was providing data is removed * Fixes issue where Android devices that have a type other than "device" or "recovery" would cause device scans to take a long time and not include any Android devices or Expansion Hubs * Only allows one instance of the REV Hardware Client to be open at a time * Fixes an issue where Pneumatic Hubs and Power Distribution Hubs would be disabled when a SPARK motor controller is commanded to run #### Servo Hub * Adds support for updating, configuring, and actuating servos on Servo Hub #### SPARK Improvements * Adds support for SPARK firmware version 25 * Improves UI for configuring closed-loop parameters (including MAXMotion parameters) on the Run and Telemetry tabs * Fixes issue updating SPARKs over the CAN bus * Improves organization of parameters on the Advanced Tab * Improves organization of faults and warnings on the Basic Tab * Some faults were renamed or combined * The statuses of the soft and hard limits are now displayed above the faults and warnings * Exposes individual faults on the Telemetry tab * Improves organization of SPARK signals on the Telemetry tab * Many under-the-hood improvements ### Version 1.6.5 / 1.6.6 Version 1.6.6 was released shortly after version 1.6.5 to fix a regression where the Telemetry graph would disappear if you switched away from the Telemetry tab while the graph was running #### Breaking changes * Windows 10 or later is now required #### General improvements * Listens for safety keys (space and enter) even when not focused * If the FRC Driver Station or another application with administrative privileges is focused, the REV Hardware Client will not see the keypress * Improves the Telemetry feature * Fixes tooltips * Fixes various chart interactions * Improves the visibility of data when more than 4 signals are active or a signal is being hovered over * Fixes the background color of image exports * Fixes an unhandled exception when resizing the window with the Telemetry tab open on a scaled display * Improves the reliability of displaying devices * Fixes an issue where all devices would be cleared out after an unexpected error occurred * Various small improvements to safety and the user experience #### SPARK improvements * Allows typing incomplete numbers into the setpoint text field * Dramatically improves behavior of the setpoint slider * Always disables the setpoint controls and displays a tooltip when the motor cannot be run * Improves the reliability of updating SPARK MAXes with firmware older than version 1.5.0 * Displays the input voltage * Renames the "Gate Driver Fault" to "Gate Driver Fault or 12V Missing" #### Pneumatic Hub improvements * Turns off all solenoids when a safety key (Space or Enter) is pressed #### Expansion Hub improvements * Fixes installing firmware onto directly-connected Expansion Hubs
### Version 1.6.4 #### General improvements * Fixes an error message appearing when the selected device is unplugged * Improves the reliability of device scans and removals * Includes changes to prevent duplicate devices from being displayed * Improves reliability of detecting new USB CAN devices * Adds support for public Software Channels #### SPARK improvements * Fixes issue where devices could run unexpectedly under certain situations * Fixes issue where the REV Hardware Client could fail to receive data from a directly-connected SPARK after updating it * Fixes issue where the REV Hardware Client would require the CAN bus to be error-free even when you were updating via USB * Disables the Run Motor button when the SPARK is under roboRIO control ### Version 1.6.3 #### Improvements * Fixes issue where SPARK firmware update retries over CAN fail to succeed * Fixes SPARK Flexes disappearing immediately after a firmware update over CAN * Fixes issue where Recovery Mode devices and SPARKs connected directly via USB fail to update when there is more than one such device. ### Version 1.6.2 #### Improvements * Prevents SPARK Flexes from being configured in Brushed mode when not connected to a SPARK Flex Dock or when their firmware version does not support the SPARK Flex Dock. * Makes adjustments for SPARK motor controller firmware version 24.0.0 * Improves reported NEO Vortex position accuracy when used with a SPARK Flex running firmware version 24.0.0 or later ### Version 1.6.1 #### Bug fixes * Fixes a crash on startup under certain circumstances ### Version 1.6.0 #### New features * Adds support for the SPARK Flex motor controller #### Improvements * Reduces the amount of data that needs to be downloaded for updates to the REV Hardware Client * Starts respecting the operating system proxy and certificate settings (improves compatibility with school and corporate networks) * Improves the warning displayed when the current FTC Robot Controller app was built using Android Studio * This warning is now always shown as a pop-up that must be confirmed if you try to replace the app. #### Bug fixes * Fixes the bundled software not being copied correctly if the REV Hardware Client was being installed for the first time * Fixes various issues related to canceling software downloads * Fixes loading certain SPARK MAX configurations * Increases default increment on SPARK MAX/Flex PIDF screen * Fixes FTC log viewer pan/zoom buttons not working until after pan/zoom with mouse * Fixes issue where uploading log files for REV support would sometimes fail ### Version 1.5.3 #### New features * Includes all software less than 1MB in size in the REV Hardware Client installer * Adds alternative installers for offline use that bundle all available software, or all software that applies to just FTC or just FRC #### Enhancements * Makes it so that downloading software and checking for updates now apply to all users on a computer * Improves performance when checking for updates with large software updates downloaded * Improves SPARK MAX fault names #### Bug fixes * Fixes issue where SPARK MAX limit switch polarities would be displayed incorrectly * Fixes issue where selecting a DFU device's type would not work * Fixes issue where non-CAN devices would not disappear when unplugged * Fixes issue where the recovery device type selection menu was not working * Improves error message when checking for REV Hardware Client updates while offline ### Version 1.5.2 #### SPARK MAX Improvements * Fixes safety issue when stopping a motor that was running in Position or Smart Motion mode * Fixes issue where the motor direction applied via the Run tab would be incorrect for an inverted SPARK MAX, making it appear that the inverted mode was broken * Fixes error when changing SPARK MAX parameters on the Advanced tab under certain conditions * Fixes issue where a SPARK MAX connected via USB would not disappear after being unplugged after a firmware update #### MAXSwerve Drive Utility Improvements * Sorts MAXSwerve drive configurations by when they were last accessed * Adds button for each selected SPARK MAX that makes the device blink momentarily * Makes SPARK MAXes blink momentarily when they are assigned a role in a MAXSwerve drive * Makes the turning SPARK MAX blink momentarily when a MAXSwerve module's calibration tool is opened * Fixes issue where the list of CAN IDs selectable in the MAXSwerve Drive Utility wouldn't be updated after changing a SPARK MAX's CAN ID **Improves the experience of updating to future REV Hardware Client versions** * It is now safe to navigate away from the About tab while the update is downloading ### Version 1.5.1 * Adds new MAXSwerve Drive Utility to the top-level Utilities tab * Current version is a beta, additional features are planned * Displays position of each MAXSwerve module's wheel * Allows all modules to be easily calibrated in one place * Detects configuration issues with the SPARK MAXes being used for MAXSwerve * Supports exporting and importing MAXSwerve drive configurations, so that the utility can be used on multiple computers without having to re-select the options * Fixes infinite spinner after restoring SPARK MAX factory defaults * Increases the number of decimal places shown for the zero offset on the \`AbsoluteEncoder\` tab, making the result suitable for pasting into your robot program * After the Absolute Encoder zero offset has been set, the icon that indicates that a parameter has been modified and needs to be burned to flash is now displayed ### Version 1.5.0 **General Improvements** * Upgrades Chart.js to improve performance and appearance of the charts * Makes minor UI improvements **SPARK MAX Improvements** * Adds support for duty cycle absolute encoders, including a new `AbsoluteEncoder` tab * Adds MAXSwerve getting started and module calibration guides to the `AbsoluteEncoder` tab * Adds support for configuring position PID wrapping * Adds support for configuring hall sensor velocity calculation * Updates SPARK MAX kFeedbackSensorPID0 to use a dropdown instead of numeric values for clearer selection of types of sensors * Fixes issue where a SPARK MAX could not be configured to follow another SPARK MAX with an ID higher than 15 * Allows running SPARK MAXes connected via the CAN bus without having to also run the SPARK MAX connected directly via USB **Pneumatic Hub Improvements** * Exposes additional telemetry values from the Pneumatic Hub **Control Hub and Expansion Hub Improvements** * Fixes issue where updating Control/Expansion Hub firmware through a Control Hub more than once would fail ### Version 1.4.3 * Fixes reported solenoid current values from Pneumatic Hubs * Adds detailed hardware fault reporting for Pneumatic Hubs and Power Distribution Hubs * Fixes issue where entries in exported CSV files were in the incorrect order (newest to oldest) * Prevents the "Report an Issue" form from being dismissed accidentally ### Version 1.4.2 * Fixes updating SPARK MAXes over the CAN bus * Adds support for restoring Driver Hubs that get stuck on the REV logo * Adds support for TensorFlow Lite models, sounds, and external libraries to the Control Hub backup feature * Updates bundled version of ADB ### Version 1.4.1 * Fixed setting the CAN ID of a SPARK MAX ### Version 1.4.0 * Adds support for the Power Distribution Hub and the Pneumatic Hub * Renames "Hub Firmware" to "Expansion/Control Hub Firmware" * Renames "Fatal" log event type to "Assert" in the FTC Log Viewer * Hides Assert events by default * Allows longer filenames in the FTC log file selector * Fixes various bugs ### Version 1.3.0 **General Improvements** * Adds FTC log viewer utility * Can load log files directly from supported devices, or from anywhere on the user's computer * Allows users to easily filter, search, and sort events parsed from log files * Graphs the occurrence of important robot issues, and their corresponding timestamps * Supports match, robot controller, driver station, Wi-Fi, and updater logs * Shows release notes for client even when an update is not available * Scales telemetry graph ranges automatically when using default ranges * Fixes issue with devices showing up multiple times when changing CAN IDs * Shows update progress for all devices that are updating simultaneously * Updates users to the latest available client version when removing a software channel * Other minor bug fixes **Control Hub Improvements** * Improves stability of the connection to a Control Hub * Includes program and manage logs with Control Hub diagnostic data sent to REV **SPARK MAX Improvements** * Fixes issue with SPARK MAX analog telemetry * Improves SPARK MAX parameter fields * Fixes issue where a SPARK MAX in recovery mode could not be updated on some computers * Adds interface to run multiple SPARK MAX devices * Adds simplified support for configuring follower mode (currently limited to following another SPARK MAX) * Shows a dropdown for the `Alternate Encoder -> kDataPortConfig` parameter ### Version 1.2.0 **General Improvements** * Allow installing previous versions of software * Show client updates are available more subtly * Reconnect to ADB if it resets * Show manufacturer names for generic android devices * Fixes issues with Control Hub and Expansion Hub firmware falsely saying out of date * Other minor bug fixes **Control Hub Improvements** * Shows warning when the Control Hub internal communication is not responding * Shows warning when Control Hub webserver is not running * Full screen mode for Program and Manage Tab * Prompts to backup Control Hub data if backup on file is over a week old * Confirmation now required to restore backed up files * Fix issues with not all files being restored **SPARK MAX Improvements** * Fixed bug where Alternate Encoder telemetry data was displaying incorrectly * Allow for complete Factory Reset of all parameters on SPARK MAX * Disabled setting of parameters that have no effect in current configuration * Fixed bug where the Client would turn white on selecting SPARK MAX ### Version 1.1.0 * Adds support for SPARK MAX and other CAN devices * Allows for updating SPARK MAX devices, installing APIs, running motors, and viewing data from the SPARK MAX and its motor. * Shows all recognized devices on a CAN bus, and the data that is sent on the bus ### Version 1.0.0 * Original Release