qMin(32, m_maxIntensity) gives 0 when firmware returns 0 for MaxIntensity
(aberrant value). maxIntensity()==0 then causes every setMaxChargingCurrent
call to be clamped to 0, falling into the <6 A path which pauses charging
silently — the user sees the action succeed but the charger stops.
qBound(6, val, 32) is correct in all cases:
- firmware reports 16 A (mono Trydan) → 16 (real installation limit kept)
- firmware reports 0 (aberrant) → 6 (safe floor, does not claim 32 A)
- firmware reports 65535 (aberrant) → 32 (IEC absolute ceiling)
The real installation limit still comes from MaxIntensity read on the device;
the bounds [6, 32] are only IEC guardrails, not hardcoded defaults.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Étape 1 complete: V2C Trydan nymea plugin (Modbus TCP, status Partial).
Plugin (IntegrationPluginV2c):
- discoverThings: delegates to V2cTcpDiscovery, maps results to
ThingDescriptors; createMethod "user" bypasses discovery.
- setupThing: registers a NetworkDeviceMonitor (IP tracking on DHCP
renewal), creates TrydanModbusTcpMaster, wires reachableChanged →
initialize() → state update on initializationFinished(), then starts
periodic polls on a 30s PluginTimer.
- updateThingStates: ChargeState 0/1/2 → pluggedIn/charging;
power = (PauseState==0 AND Lock==0) per evcc trydan.go Enabled().
- handleDynamicConflict: if Dynamic==1 (V2C internal PV optimizer),
write PauseDynamic=1 to suppress it. NEVER write Dynamic=0 (silences
ChargePower telemetry). Writes only on state transition to minimize
flash wear. cf. github.com/evcc-io/evcc/issues/28047.
- Action "power": writes PauseState then Lock (always in mirror), then
fire-and-forgets PauseDynamic if Dynamic==1. Action handlers filter
writeCompleted by register address to avoid reacting to concurrent
background writes.
- Action "maxChargingCurrent": clamps to [minIntensity, maxIntensity],
writes Intensity. Below 6A → pause instead of invalid setpoint.
JSON (integrationpluginv2c.json):
- ThingClass "trydan" implementing evcharger + connectable + networkdevice.
- settingsTypes: suspendInternalOptimizer (bool, default true) — allows
the user to disable Dynamic conflict management if they want the V2C
PID to remain active alongside the HEMS.
- State "chargeEnergy" exposed as diagnostic only (NOT sessionEnergy) —
firmware reliability on this register is unvalidated; cf. evcc #28047.
Build (v2c.pro):
- MODBUS_CONNECTIONS intentionally empty: the modbus-tool code generator
assumes non-overlapping block reads; leaving it empty skips generation
while still linking nymea-modbus via the PKGCONFIG in modbus.pri.
VendorId 56c3e7bb… is new (no existing V2C vendor in the repo).
PluginId f0692725… is new (generated for this plugin).
PORTING_STATUS_modbus.md documents register sources, the 4 items that
require validation on real hardware, and the "no beta matrix" constraint.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Architecture choice: Modbus TCP has no network discovery mechanism, so
discovery piggybacks on nymea's NetworkDeviceDiscovery (ARP/mDNS scan)
and then probes each host via GET /RealTimeData (V2C Trydan HTTP REST API).
The presence of a "Paused" field in the JSON response is used as a Trydan
fingerprint — it matches the charger model and is absent on generic devices.
cf. evcc charger/trydan.go realTimeData struct.
Probes run concurrently (one QNetworkReply per host) but the sequence
terminates via two independent paths that could both fire:
1. The NetworkDeviceDiscoveryReply::finished callback arms a 3-second
QTimer::singleShot to give outstanding probes time to complete.
2. Each probe completion path checks (m_scanFinished && pendingProbes==0)
and calls finishDiscovery() early if all probes are already done.
A m_finished bool guard prevents double-emission of discoveryFinished()
if both paths fire in quick succession (e.g. all probes complete exactly
as the timer fires).
Manual-entry (createMethod "user") skips discovery entirely; setupThing()
is called directly with the user-supplied IP.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Architecture choice: separate the register map / business logic from the
physical transport. TrydanModbusMaster (abstract QObject) holds:
- the complete ReadRegister / WriteRegister enums with addresses
- float32 Big/Big decode helpers (memcpy pattern, matches pymodbus
BinaryPayloadDecoder byteorder=Endian.Big wordorder=Endian.Big)
- all last-polled cached values accessible via simple getters
TrydanModbusTcpMaster (concrete, Étape 1) wraps libnymea-modbus
ModbusTcpMaster. Each register read is a distinct FC3(addr, 2)
transaction via a recursive runReadSequence/doNextRead pattern —
never a block read, because the V2C firmware's register windows
overlap (0x0BC2 and 0x0BC3 each span 2 registers, so a range read
starting at 0x0BC2 for ≥3 registers returns garbage for the second
value). Writes use FC6 (single uint16, not float).
writeCompleted(quint16 address, bool success) carries the originating
register address so that concurrent background writes (e.g. PauseDynamic
from the conflict manager firing during an action) do not interfere with
action handlers waiting on a specific register's acknowledgement.
0x177E (Dynamic) is intentionally absent from WriteRegister: writing it
to 0 silences ChargePower telemetry even though the charger keeps running.
cf. evcc charger/trydan.go and github.com/evcc-io/evcc/issues/28047.
Étape 2 (RTU) will add TrydanModbusRtuMaster on the same interface;
no changes to plugin or register logic will be required.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- abbterra-registers.json : suppression des 4 registres WO
(chargingCurrentLimitCommand, socketLockCommand, startStopChargingSession,
communicationTimeoutCommand) incompatibles avec le generateur libnymea-modbus 1.15
- integrationpluginabbterra.cpp/.h : suppression de executeAction + applyTimeoutSetting
- integrationpluginabbterra.json : power + maxChargingCurrent passes en lecture seule
(writable/displayNameAction retires)
La borne sera reconnue et lira les mesures ; le pilotage sera rebranche
quand le generateur 1.16 sera disponible.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
