READ FIRST!
New firmware release and upgrade procedure
Firmware 4.0:
Release notes:
System 4.0.2
Fix wrong ownership of generated device certificates.
Application 4.0.2
Charger Operations
Improve modem (re)connection logic to fix some edge cases.
System 4.0
Update buildroot to 2021.02.4.
Update .NET to 5.0.9.
Add support for configuration migration after OS upgrade from 1.x firmware.
Generate self-signed TLS certificates for the device on boot if missing.
Prevent system downgrades.
System upgrade keeps the installed app if it is newer than the build-in one.
Replace ETREL boot logo with BOOTING text + icon.
Add support for UC20 modem.
Remove LLMNR responder.
Do not encrypt /data partition on newly installed systems.
Fix AFE scaling factors when reading measurements.
Application 4.0
Charger Operations
Fix EVSE state transitions for charger with cable.
Prevent installation on incompatible system.
Take absolute value of power factor to prevent other cars being erroneously detected as ZOE and thus limiting minimum current to 15 A.
More accurate reporting of firmware update errors via OCPP and web UI.
Charger remains available during firmware update installation.
Fix switching availability status in some situations.
Hide firmware download URLs form event list as they might contain FTP credentials.
Fix wrong event (AFE meter failure) being reported on MID meter failure.
Fix AFE scaling factors.
Fix configuration sometimes reverting to factory defaults after an upgrade.
Prevent restarting DHCP negotiation on eth0 when applying network settings.
Fix session synchronisation with Power Management.
Fix firmware update to correctly report invalid image version.
Fix IEC bender fault never being reset.
Fix energy limit persisting across sessions.
OCPP
Fix OCPP StopTransaction being sent before response to Reset message.
Fix issue when charger might sometimes give up reconnecting to the central system via WS connection.
Prevent sending an OCPP/J authorisation header when authorisation key is set to an empty string.
Always serialise time with 3 decimals to OCPP messages.
Fix energy limit DataTransfer message being repeatedly sent.
Fix connector ID for clock-aligned MeterValue messages.
Modbus
Implement ModbusTCP over TLS.
Add register 46/146 (float32, in kWh) with planned energy consumption.
Add register 48/148 (uint64, in mWh) with the current energy meter value.
Change connector status enumeration to match OCPP states rather than internal connectors controller states.
...