READ FIRST!

New firmware release and upgrade procedurePreview

Release Notes – Version 7.0.2 & 7.1.1

Release Date: Jan 23, 2026

You can download firmware here: 7.1.1Preview

System 7.0.2

• Updated bundled Application to version 7.1.1

• Updated Buildroot for security and robustnest improvements.

• Added Noto Sans fonts (latin, Symbols, Symbols2 and Arabic UI).

• Added splash screens during boot and shutdown.

• System logs now available also after reboots.

• Synchronize RTC with the system clock every 12 min, even when NTP is not active.

• Enabled auto-connect for mobile connections when in roaming.

Hardware and Platform Support

• Added support for Duo Powerboard v1.3.1

• Added network interfaces required for ISO 15118 EV communication.

Networking

• Fixed network settings not being applied on eth1 interface on Brain systems.

• Fixed LTE modem reset issues.

• Restored traditional network interface naming on PC builds to improve compatibility with network configuration tools.

Fixes and Improvements

• Improved Ethernet switch driver

• Debug logging to aid LTE modem diagnostics

• Other minor fixes and improvements

Application 7.1.1

Charger Operations

• Improved MID meter detection logic based on charger model.

• Added support for charging with MaxEnergyOnInvalidId when using an invalid ID tag.

• Removed support for legacy Renault ZOE models:

  • Minimum current now always assumed to be 6 A.

  • Initial maximum current set to 16 A.

• When an EV does not reach 10 A during the initial phase, the EV max current is now set to the highest measured value, instead of being fixed at 10 A.

• Implemented dynamic reload of MID configuration via setMIDCounterAddress web API.

• Applied Ethernet configuration on both ports on Brain.

• Added automatic generation of default settings for newer charger models after upgrade or data-partition reset.

• Implemented automatic reconnection of MID energy meters after they return online.

• Improved cluster utilization reporting when OCPP is disconnected by using the fallback current as EV max.

• Fixed session restoration after power loss not sending periodic updates to Power Management.

• Corrected manual system-clock synchronization with the RTC.

• Fixed current rounding when calculating from power values in charging profiles.

• Implemented detection of “Protection Tripped” errors triggered by communication issues with energy meters on INCH Duo models.

• Fixed charging-limit discovery not starting if an EV was already connected at system boot.

• Replace the old set of connector states with the new EVSE states: Available, PreparingUnauthorized, PreparingDisconnected, PreparingWaitingForEv, Charging, SuspendedByEv, SuspendedByEvse, Finishing, Reserved, Unavailable, Faulted.

• Increased log retention by lowering flash deletion threshold.

• Omitted the 3 seconds delay for switching to the Finished state at the end of charging.

• Trip RCD if the current reaches 35 A.

• Added Support for Schuko connectors on for Inch Duo.

• Added support for advertise on DNS-SD via DeviceInfo Service.

• Limited GUI logo and commercial image uploads to 1 MiB.

• Disabling Interactive Charging if not connected to Power Management.

• Added support for Iskra WM3M4, WM3M4C and Carlo Gavazzi EM580 energy meters.

• Improved Phase Detection During Charging.

• Added another attempt of measuring the maximum EV current 30 min after the start of charging session.

• Switch to unavailable state if door is open on INCH DUO.

Fixes

• Fixed ChangeAvailability incorrectly returning “Scheduled” when connector was in “Preparing” state.

• Fixed long delays in the main loop caused by Power Management communication when a MID meter is offline.

• Fixed cases where EV max current could be set below 6 A.

• Fixed charging profile 0 recalculation after Daylight Saving Time (DST) changes.

• Fixed StopTransactionOnInvalidId logic being inverted.

Payment

• Added support for cloud-based payment terminal (e.g. Payter Apollo)

• Added CZK, DKK, NOK, PLN and SEK currencies.

• Removed HRK currency.

OCPP

• Always accept TransactionId provided by CSMS.

• Fixed duplicate StopTransaction messages.

• Rejected RemoteStartTransaction requests when a transaction is already active.

• Added humidity measurand (returns a fixed value of 54.289 pending sensor implementation).

• Ensured Energy.Active.Import measurand name is always included.

• Implemented MaxEnergyOnInvalidId behavior.

• Implemented OCPP 1.6 Security Extensions (certificate management, security event notifications and signed firmware update).

• Implemented OCPP and California Pricing Requirements (OCPP 1.6 pricing & cost extensions).

• Added support for sending advertisement and vendor logo images via DataTransfer Messages. Correct image sizes needs to be used.

• Added notifications about Load Guard going offline or coming back online.

• Added support for client certificates in OCPP 1.6/S connections.

• Fixed:

  • Settings not being saved after changes via OCPP.

  • Fix commercials set via DataTransfer being disabled for all days.

  • Redundant StatusNotification messages after reconnect.

  • Interleaved RemoteStart and Authorize message order.

  • Missing TransactionId field in MeterValues messages.

Modbus

• Introduced response delays to mitigate potential Denial-of-Service (DoS) scenarios.

• Two Modbus registers have been added to store the last used RFID card code. More information can be found on the Modbus registers page on our Etrel Knowledge Centre.

Settings

• Prevented Authorization.Type changes from being applied during runtime.

• Re-added:

  • MeterValuesAlignedData

  • MeterValuesSampledData

• Removed deprecated parameters:

  • CentralSystem.Client.MeterValues.AlignedData

  • CentralSystem.Client.MeterValues.SampledData

  • CentralSystem.Client.WebSocketPingInterval

• Fixed MID meter detection logic when upgrading configuration.

• Modbus is now disabled by default when generating new settings.

• Added Authorization.MobileAppQrFirst option to display the QR-code tab first on the Login App screen.

• Added settings for Authorization:

  • OcppAuthorizationCacheLifeTime

  • OcppAuthorizationCachePolicy

  • MasterPassGroupId

  • WriteRfidToModbus

• Added settings for Auxiliary

  • DisableDoorOpenUnavailable

  • InchMidLedOn

• Added settings Central System Communication Client

  • IsAuthorizationKeyPlaintext

  • RetryBackOffRandomRange

  • RetryBackOffRepeatTimes

  • OfflineThreshold

  • NumRetriesTransactionEvent

  • QueueAllMessages

  • MonitoringLevel

  • MaxItemsPerMessageGetVariables

  • MaxItemsPerMessageSetVariables

  • Transaction

  • Removed HeartbeatInterval; OCPP HeartbeatInterval setting now accesses the actual heartbeat interval

• Added settings Central System Communication Meter values

  • Updated measurand names to align with OCPP standards.

  • MeterValuesSignatureContexts

  • StopTransactionSignatureContexts

  • StopTransactionSignatureFormat

  • AlignedDataSendDuringIdle

• Evse

  • OvercurrentTripRcdEnabled

• Evse MeterType

  • Replace IskraModbusRtu with specific Iskra models: IskraWm1M6, IskraWm3M6, IskraWm3M4, IskraWm3M4C.

• Network

  • New default Google time server if NTP is not configured.

GUI

• Replaced Base64 encoder/decoder with a faster, better-maintained library.

• Fixed Service menu not working on Payment_LocalOrRemote screen.

• Background images now auto-scale to fit screen resolution.

• Removed redundant no-NO locale (merged with nb-NO).

• Improved naming for languages with multiple variants (German, Portuguese).

• Adjusted layout and formatting on the Service screen.

• Added Support button on Duo login screen when no other bottom buttons are shown.

• Added Icelandic translation.

• Fixed intermittent visibility of the Pricing / Pay Here button.

• Added charger and connector labels to Payment connector selection screen.

• Removed target current display and slider from charging status screen

• Resize of the QR code on the pricing screen on INCH Duo

• Add instructions screen for the cloud-based payment terminal on INCH Duo

• Update overcurrent error message.

• Change delete button behaviour on PIN entry screen to delete the whole input.

• Added new language: Welsh (Cymraeg)

• Service menu

  • Added option to enable/disable Wi-Fi.

  • Added load guard status.

• Trimmed label text and added ellipsis if the text is too long.

• Fixed Pricing / Support button not visible on Bank Card payment screen.

• Fixed EVSE 1 icon on Connect the vehicle screen.

• Fixed Leakage detected message text.

Power Management

• Fixed unstable Wi-Fi connections to Load Guard devices.

• Improved message timeouts.

• Improved detection of offline slaves and their exclusion from cluster control.

• Ensured target updates are always sent to slaves to prevent desynchronization after message loss.

• Version 3 of the Power Management protocol remains compatible with previous versions; however, we recommend updating all chargers to the latest firmware to ensure optimal performance and stability.

• Added support for Eastron EDM630, Siemens 7KM2200 and PhoenixContact EEM-MA371 meters that can be used for DLM.

• Updated following GUI screens:

  • Duo login RFID screen

  • Duo payment cloud instructions screen

  • Duo support page screen

• Fixed:

  • Socket clean-up after slave disconnection to avoid exceeding file-descriptor limits.

  • Load-prediction calculations for three-phase vehicles when no single-phase vehicles are present.

Web Interface 2.8.18

Enhancements

• The Master charger code can now be edited on chargers with P6xx hardware.

  • In this case, the Satellite code is automatically synchronized with the Master code.

• Added support for the Authorization.MobileAppQrFirst setting.

• Text change: “User logout with RFID” to “User logout with ID”.

• Removed duplicate Norwegian (no-NO) translation.

• Removed stray label IsAuthorizationKeyPlaintext.

• Support for downloading the device certificate to be signed and uploaded back to the charger.

• Added option to delete all personal data form databases.

• Added a new popup screen for choosing languages.

• Added information about Wi-Fi module firmware version and MAC address in the Wi-Fi connectivity status window.

• Added information about LTE modem model and firmware version in the Mobile connection status windows.

• Added slave IP addresses in Power Management status window.

Fixes

• Fixed incorrect authorization status display in the Authorization table.

• Minor improvements and text corrections.

• Fixed filters in Reporting menu.

• Corrected the phase-rotation display in the web interface to ensure accurate information is shown for each charger model.

Connectors Controller

INCH (v6.14)

• Disabled CP relay function during wake-up procedure.

• Adjusted timing parameters for wake-up sequence.

• Introduced feedback averaging and a status-history queue for improved signal stability.

• Added contactor-welding detection during “available” state check.

• Added enforced wait for Bender test completion before next test cycle.

• Code clean-up.

INCH Duo (v0.77)

• Introduced feedback averaging and status-history queue.

• Disabled CP filter on Connector 0.

• Disabled Bender tests when already in a fault state.

• Added support for Duo Powerboard hw 1.3.1 .

• New features on hw 1.3.1:

  • Ems210 temperature-sensor support.

  • External EEPROM support.

  • Single-contactor feedback (RCD feedback disabled).

• Disabled runtime log output (limited to 32 kB bootloader buffer).

• SOM always on (requires bootloader update).

• Added CLI support when logging is enabled.

• Code clean-up.

Fixes

• RCD trip is no longer persistent; unavailable commands during fault are properly handled.

• Added enforced wait for Bender test completion before allowing a new test.

Firmware 5.4.1 download:

You can download firmware here: 5.4.1Preview

Application 5.4.1 

Charger Operations 

• Discovery Phase: Prolonged the discovery phase at the start of a session from 20 to 40 seconds, ensuring it did not stop at 10 A. 

• Current Measurement: Prevented re-measuring the maximum EV current when charging was paused. 

• Load Guard Connection: Received updates on Load Guard connection status from Power Management, which were logged and reported as events. 

• OCPP Reboot Reason: Unified internal enumerations for charging stop reasons to correctly report OCPP reboot reasons. 

• OCPP BootNotification: Prevented the charger from responding to OCPP messages if the BootNotification was rejected. 

• Authorization: Checked the identification expiration time during authorization. 

• Log Management: Forced logs to flush to disk on power loss to avoid missing entries. 

• PlugAndCharge: Fixed cases where the PlugAndCharge tag ID was sent incorrectly. 

• Power Management Reconnection: Fixed reconnection failures to Power Management in some cases. 

Payter Integration 

• Fixed rounding issues for values sent to Payter. 

• Removed support for the HRK currency. 

Modbus 

• Added virtual state 11 to the connectors controller status register (0, 100) to represent a "reserved" status. 

• Removed the EVSE status register (52, 152). 

• Fixed the update of the CC status register (0, 100) when disconnecting a cable. 

Settings 

• Implemented the logic behind StopTransactionOnInvalidId and made it writable. 

• Added CentralSystem.Client.StopTransactionOnInvalidId as an alias for StopTransactionOnInvalidId. 

• Removed CentralSystem.Client.HeartbeatInterval. 

• Updated HeartbeatInterval to report the currently active heartbeat interval instead of acting as an alias for CentralSystem.Client.HeartbeatInterval. 

Power Management 

• Siemens 7KM2200 Support: Added support for Siemens 7KM2200 as a Load Guard. 

• Compatibility Fixes: Protocol issues from version 5.4 were resolved in version 5.4.1; however, this fix has caused version 5.4.1 to be incompatible with version 5.4

• Resume Mechanism: Reworked the charger resume mechanism to address issues with Power Management reconnecting multiple chargers simultaneously. 

GUI 

• Login Options: Adjusted icons and labels on the Login screen to provide more space for text beneath the icons. 

• Connector Lock Screen: Added a new screen to indicate when the connector remained locked after charging while the cable was still inserted. 

Web 2.8.8 

• Cluster Data: Displayed cluster data on the Brain's dashboard. 

• Console Warnings: Fixed most warnings displayed in the browser's developer tools console. 

• HRK Currency Removal: Removed the HRK currency from the system. 

• Dashboard Changes: Removed building energy consumption data from the dashboard. 

• Menu Language Fix: Fixed the duplication of languages in the left-hand menu. 

• Max Current Display: Corrected the dashboard to display the session's max current as the sum of all phases. 

Connectors Controller 

INCH (v6.9) 

• Cable Lock/Unlock: Fixed cable lock/unlock issues for older hardware (stations older than 19420xxx). 

• Cable Detection: Reworked the cable detection mechanism. 

• DC Leakage Test: Ignored DC leakage test commands when no leakage device was present. 

• EVSE Paused State: Transitioned to the Paused by EVSE state when the current dropped below 6 A. 

• Signal Analysis: Fixed "CP out of range" errors with improved signal analysis. 

• PWM Generation: Generated PWM signals in the Preparing state. 

• Watchdog Logic: Rewrote the watchdog logic for SOM restarts. 

• PWM Disturbances: Increased ADC range tolerance for PWM disturbances, mitigating DiodeInCarMalfunction/Negative12VNotDetected errors. 

• Plug Unlocking: Fixed plug unlocking in the Available state. 

• Connector State Transitions: Adjusted state transitions after charging ended, moving from Charging Ended to Preparing and then to Available when disconnected from the EV but still connected to the charger. 

INCH DUO (v0.61) 

• Cable Unlock: Fixed false positive cable unlock issues. 

• Feedback Delay: Reduced feedback delay from 3000 ms to 500 ms. 

• DC Leakage Test: Ignored DC leakage test commands when no leakage device was present. 

• EVSE Paused State: Transitioned to the Paused by EVSE state if the current fell below 6 A. 

• Plug Locking/Unlocking: Improved plug lock/unlock reliability by adding retries upon failure. 

• Connector Unlocking: Prevented automatic unlocking of connectors in the Charging Ended state. 

• ADC Level Adjustment: Adjusted ADC levels for better accuracy. 

• Connector Welded Errors: Fixed false positive ConnectorWelded errors. 

System 5.0.9 

• Bundled and updated the app to version 5.4.1. 

System 5.0.8

• Update the bundled app to 5.3.

• Lower the LCD refresh rate to 27MHz.

• Updated OpenSSH library to latest version.

Bootloader

• INCH

  • Prevent switching to the other system if the SOM 3x consecutively loses power before the boot of the system is completed.

Application 5.4

Date: 21.12.2023

Application 5.4

• Meassure EV maximum charging current again after 30 minutes (issues with cold/hot battery)

• Increase initial EV limits measuring to 60 seconds.

• Smaller charging profile fixes for edge cases

• Added meter value configuration keys without phase suffix to enable simultaneous reporting for all phases

• Enabled verbose logs by default