Updated on February 20, 2026
The Symbios platform is a living ecosystem. With regular firmware updates, you can keep your system operating at maximum efficiency and unlock a constantly evolving slate of enhancements: new diving screens, improved functionality, extended Symbios integrations, and more.
You can find the firmware update instructions, the latest firmware files, and archived versions here.
Summary of Recent Updates
FW V2.34.12 - Live Firmware
Release Date: February 19, 2026
Various bug fixes and improvements
- Diluent subitem numbering in “SELECT GAS” menu fixed
- Obsolete depth/time removed on the HUD buddy screen
- HUD depth and time of previous dive color changed to grey
- Housing pressure sensor range checks added during initialization
- pO₂ difference warning popup added (appears if pO₂ difference > 0.3 bar and clears if < 0.15 bar) in CCR mode
- HUD logbook bug fix for dives >99 minutes
- Stopwatch resets automatically if time exceeds 999:59
- GPS enable menu item added in system menu (support for upcoming GPS buoy release)
- “SAVE GPS” popup added on surface if GPS data available
- Long press button B during popup saves waypoint labeled “START”
- Long press both buttons dismisses popup
- BATTERY FULL indicator added to USB screen if state of charge >96%
- New Tactical functions (Tactical Handset only):
- Display auto switch-off time adjustable via menu
- Green + red color scheme added
- Tactical display off function moved to double-press button
- Display off behavior adapted
- Tactical colors refined
- Manual display off for tactical devices added
- Tactical compass color schemes (red / green), external compass scale colors inverted
- Tactical menu moved to root and restructured
Across both the Symbios Handset and HUD, we’ve strengthened system validation and data clarity. Initialization now includes housing pressure sensor range checks, and CCR divers receive a clear pO₂ variance warning when sensor differences exceed defined thresholds. Several interface refinements improve gas selection clarity and remove outdated information from buddy screens.
Logbook and timing behavior have also been corrected, including resolution of the >99-minute HUD display issue and automatic reset of the stopwatch when exceeding its upper limit.
This update further prepares the Symbios ecosystem for expanded GPS capability. With GPS enabled, surface detection triggers a “SAVE GPS” prompt, allowing divers to quickly mark a “START” waypoint or dismiss the popup as needed.
This release also expands Tactical functionality for authorized military-use configurations. These new Tactical features are exclusive to designated Tactical Handset units and are not available on standard units. The interface has been streamlined, menu access improved, and display behavior refined for operational flexibility.
Finally, charging feedback has been improved with a clear BATTERY FULL indicator once the state of charge exceeds 96 percent.
FW V2.33.11
The Symbios team has unlocked functional enhancements such as:
- New screen options
- Expanded “Training” mode functionality
- Color-enhanced warning popups
- Extensions in the links for Symbios-enabled products
- Enhanced buddy screen functionality
- Expansion for gas management
- Improvements in the dive log import functionality
- Refinement in pushing gas profiles to ensure overwriting of Handset selected gas
- Selection of last deco stop
- Dive and deco pO2 differentiation to trigger pO2 high popup warning
We’ve also added remaining gas time, equivalent gas consumption, and buddy gas as custom field options in OC and sidemount mode, allowing users to track personal gas consumption or the tank pressure of dive buddies while using the Symbios POD. This custom field (which is enabled by the user) enhances several optional screens including those dedicated for decompression stops, buddy information, gradient factor/tissue loading, wireless data sources, dive profile, and GPS navigation.
Users can now end a “training” dive simulation and resume normal computer functionality. This feature augments the five training profiles installed in Symbios computers, allowing users to run simulated decompression and ascent profiles while practicing efficient ascents and decompression stops—for example, adding +10 min at 40 m/130 ft and +10 min at 60 m/200 ft to an actual dive profile.
We’ve expanded the GPS module to allow for detection of previous GPS waypoints, extending beta testers’ ability to log “home” and multiple waypoints. In the near future, users will be able to launch a GPS buoy to the surface, allowing the buoy to capture and record a GPS signal. When the diver reels the buoy back to their current position, the Symbios ecosystem will capture and present that current position in relation to recent waypoints and “home” location.
We’ve extended the Symbios enabled battery detection beyond DPVs to include functionality for Symbios-enabled lights allowing wireless transmission of remaining run time (RRT) and state of charge (SOC). This functionality is in active beta testing for release in 2025.
Finally, we’ve enhanced functionality for third-party CCR pairings and added appropriate hooks to support a forthcoming gas analyzer.
Release Notes for firmware changes since the public launch of Symbios Computers
FW V2.33.11
- Gas enabled during a dive is added to divelog
- Remove disabled gases or those without simulated pressure during dive simulation
FW V2.33.10
- Exception added to ensure that at least 1 custom field is always available
- Trimix analyzer POD added to wireless interface for future integration
- Refine gas table correction algorithm to ensure proper transfer of profiles
- SGC (surface gas consumption) renamed to SCR (surface consumption rate)
FW V2.33.09
- Gas table validation added to the BLE interface to support smooth profile transfer
- Gas editing now consistent with the app so that gases are only edited, not deleted
- Default gases changed as follows:
- Open Circuit
- Gas 1: AIR (enabled)
- Gas 2: NX50 (disabled)
- Gas 3: NX99 (disabled)
- Gas 4: TX21/35 (disabled)
- Gas 5: TX18/45 (disabled)
- Diluent
- Gas 6: AIR (enabled)
- Gas 7: TX21/35 (disabled)
- Gas 8: TX18/45 (disabled)
- Open Circuit
FW V2.33.08
- Symbios CCR CO2 sensor data added to custom field when data is received
FW V2.33.07
- GPS coordinates added to GPS screen
- GPS screen shows received time of last GPS position
FW V2.33.06
- Buddy gas added to custom field
- Date/time added to custom field
- Diluent pO2 shifted to the second position in the custom field
- Safety pressure in the RGT algorithm changed to 50 bar/700 psi
FW V2.33.05
- Bluetooth driver adaptations
- Ascent gas consumption removed from RGT algorithm
FW V2.33.04
- Symbios CCR mode O2 warning popup message adjusted
FW V2.33.03
- Bluetooth driver adaptations to resolve “ghost gas” presentation
- Bluetooth interface adaptations to resolve dive logging problems
WARNING: After firmware update, settings will be reset!
FW V2.33.02
- Temperature compensation removed form SGC value
- Tank pressure logging change to 0.1 bar / 1.5 psi resolution
FW V2.33.01
- Temperature compensation and averaging added to SGC algorithm
FW V2.33.00
- Dive timeout subtracted not included in dive time
FW V2.32.09
- Dive mode menu adjusted on Handset Light
FW V2.32.08
- SGC algorithm improved, buffer size extended
- Deactivated Symbios pO2 sensors not deactivated on the buddy screen
- Bluetooth hardware error logging added to blackbox
- GF graph: GF data restored after simulation
FW V2.32.07
- Leading tissue added into logs for GF now and GF surface
- Maximum pO2 for bottom gas setting added to BT interface
- Training deco data color changed to yellow
FW V2.32.06
- Remaining gas time added as a custom field option in OC and sidemount mode, allowing users to track gas consumption (must be enabled by the user)
- Functionality added to stop “training” mode, allowing users to terminate a training simulation and return to normal computer functionality
FW V2.32.05
- Surface equivalent gas consumption added as a custom field option in OC and sidemount mode (must be enabled by the user)
FW V2.32.04
- Flight time set to 24 hours with a deco violation if the calculated no flight time is less than 24 hours
- Depth and dive time color set to gray when on surface
FW V2.32.03
- Refinements to training menu algorithm for simulated ascent and decompression profiles
- GPS module improvement, allowing for detection of previous GPS waypoints
FW V2.32.02
- Four additional training profiles added to the ascent and decompression training simulator
- Added ability to set the last deco stop between 3 m/10 ft and 6 m/20 ft
- CC/bailout shortcut is added if a third-party CCR is paired
FW V2.32.01
- BT service commands added
- Water contact status added to pO2 low warning conditions
- Symbios-enabled light remaining run time limited to 1,999 min
FW V2.32.00
- Symbios-enabled light state of charge and remaining run time added to custom field options
- Pairing added for Symbios-enabled gas analyzer
- Functionality enhancements for efficiency of file management
- Functionality enhanced for multiple popup message with colors added
FW V2.31.09
- CCR diagnostics extended to Greenflash pO2 sensor, diluent/O2 tank sensor, and sentinel/controller ADC
- PO2 thresholds for deco and bottom gases renamed for clarity
FW V2.31.08
- GPS screen added to enhance support for GPS functionality (visible only when GPS device is paired)
FW V2.31.07
- CCR diagnosis screen added in system menu (only if Symbios CCR is paired)
- The gas enabled info added to divelog recording status
- “No Fly” time added to the custom field when on the surface and if greater than zero
FW V2.31.06
- Data available on the wireless RB screen extended to encompass more parameters
FW V2.31.05
- Various functionality enhancements to firmware
- Refinement of unique Buddy Screen facilitating easy reading of dive buddy data (must be enabled by the user)
FW V2.31.04
- Warning popup messages adapted and refined for clarity
- PO2 warning in settings menu extended to enable the gas with highest MOD to trigger the pO2 high warning popup
- Scrubber counter counts until -199 min to allow time tracking beyond proposed limits
- Training menu added:
- Available when NDT greater than 1 min and depth less than 30 m/100 ft
- +10 min at 40 m/130 ft and +10 min at 60 m/200 ft can be added to tissue saturations, enabling the user to simulate decompression and practice ascents
- CCR deco and CNS calculation enhancements
FW V2.31.03
- Buddy screen added (must be enabled by the user)
FW V2.31.02
- CCR-POD FO2 value during pO2 calibration saved in settings structure
- GPS data from paired devices logged in the .csv dive log for tracking and presentation
- GPS dive start waypoint automatically saved at start of the dive (if GPS signal is available)
FW V2.31.01
- CCR tissue saturation calculated based on the smallest received pO2 value
- Wireless IDs now visualized in 4 digits and can be edited
FW V2.31.00
- TTS +5 min added as a custom field option settable by the user
FW V2.30.16
- CCR linearity check failed error message added to facilitate two-point calibration
- Sidemount SWITCH GAS popup message conditions adjusted
- Vibrator warning deactivated when wet contacts are dry
FW V2.30.15
- Wireless pairing enabled during BT communication to facilitate easy pairing with CCR head
FW V2.30.14
- Error code added to CCR hardware error popup message to diagnose hardware problems
- BT firmware file name changed to BTPV12.BIN, resp, BTV12.BIN
FW V2.30.13
- BT interface extended to support additional functionality
FW V2.30.12
- Improvement developed for receiving pairing IDs via BT interface
- Dive time changed to mm:ss format in deco/tissue screen
- Custom field title captions refined for clarity
FW V2.30.11
- Italian language added
- Spanish language added
- PO2 maximum range adjusted to 0.5 bar to 1.7 bar
- Warning system algorithm improved
- 0.5 m tolerance added to best gas algorithm (i.e., each gas switch now 0.5 m earlier)
FW V2.30.10
- Feature enhancements for simulating Symbios CCR data, O2 tank pressure, and display of diluent regardless of active OC gas
FW V2.30.09
- Button behavior for HUD set to match Handset logic
- Standby menu entry created and disabled in dive mode
- Display brightness adaptation set to allow real-time evaluation of levels
- New warning popup messages added to support user identification:
- Symbios CCR solenoid failure
- Symbios CCR ambient pressure sensor failure
- Symbios CCR hardware failure (SD-card/battery fuel gauge/housing pressure sensor)
- Added CCR O2 tank pressure low (< 25 bar) in addition to 50 bar
- Dive computer battery state of charge low set to display when less than 15%
- Warning system enhanced to prioritize messages and refine “ignore” functionality
- Warning indicator highlighted with color to support identification on pressure bar graphs
- HUD main screen label refined scrubber counter custom field
- Wireless data received icons added to HUD Symbios CCR screen to allow visibility of dual wireless transmissions
- Refined support for switching to manual bailout in Symbios CCR mode
- Average pO2 added to custom field in HUD and Handset dive screen
- Ascent speed added to bottom timer mode
- Battery state of charge value added to HUD auxiliary screen
- Symbios CCR battery state of charge value added to auxiliary screen (Handset and HUD)
FW V2.30.08
- BT broadcast changed to serial number
- BT name removed from system info menu
- Depth flashing in red added while in OC/CC bailout mode on dive screen when pO2 exceeds the maximum (OC pO2 bar value configured in settings menu)
- PO2 high message box shown in OC and CC bailout mode on the dive screen when pO2 exceeds maximum (OC pO2 bar + 0.1 bar)
- In CCR FSP mode, O2 only shown on the right side on the dive screen if paired
- In CCR FSP mode, the setpoint is the default custom field value
- Sleep menu entry added to root menu to switch off the dive computer
- Deco screen shows ceiling depth in the lower right corner instead of GF sur
FW V2.30.07
- Logistic data written to blackbox when blackbox file created
- Wireless data received indicator added to the Symbios CCR screen
FW V2.30.06
- BT interface extended to support CCR fixed setpoint high
- BT interface extended to support CCR fixed setpoint low
- BT interface extended to support language files update bits
- GPS screen improvements added
- Deco screen enabled by default
FW V2.30.05
- Refinement in presentation of fonts
FW V2.30.04
- Refined handling of pairing data when entering CCR mode
- Refined presentation of Symbios CCR SOC
- Greenflash/Symbios CCR SOC message timeout changed from 30 seconds to 45 seconds
- When Symbios CCR is paired, sentinel pO2 data added to .csv divelog
FW V2.30.03
- Dive simulation speed factor added to CNS/OTU algorithm
- Dive simulation stopped when app terminated
FW V2.30.02
- Refinement in BT dive simulation
FW V2.30.01
- Depth graph updated when entering depth graph screen
- Depth graph cleared after dive simulation
- CCR pairing data removed when changing dive mode
- CCR diluent grayed out in case of Symbios CCR high pressure sensor error
- CCR O2 grayed out in case of Symbios CCR high pressure sensor error
FW V2.30.00
- Depth chart added as optional screen (must be enabled by the user)
- Deco ceiling depth added as a custom field option
FW V2.29.08
- BLE boundary check added in dive simulation
FW V2.29.07
- BLE interface adapted and refined
- Unique gradient factor screen added (must be enabled by the user)
- Dive timeout reset removed when a button is pressed on the surface and still in dive mode
- Refined custom field battery SOC presentation
FW V2.29.06
- HUD CNS visualization refined in custom field
- Diluent visualization refined in custom field
FW V2.29.04/05
- Firmware update is no longer case sensitive
- Menu default style changed to 'modern'
FW V2.29.03
- Gas switch popup box presentation refined
FW V2.29.02
- Encrypted firmware file management refined
FW V2.29.01
- CCR FSP setpoint color coding refined
- Splashscreen START.DAT renamed to START.BMP
- Dive .csv logging function optimized
- Refinement to display orientation when communicated via BT
FW V2.29.00
- BLE file receive timeout adjusted
- BLE file transfer timeout adjusted
- Naming in the menu changed to simplify identification and ease of use
- New firmware update file naming enabled