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11 · Changelog

1.3.0 — Fleet + v1.3 protocol

Brought the Arduino library into line with the rbAmp v1.3 wire contract and the cross-platform reference model (STM32 HAL / ESP-IDF / Python). HW-validated on a heterogeneous fleet (UI1 + I2 + I3) through the public API with raw-register ground-truth (38/38 full-coverage suite + extended app-WDT soak).

Added

  • RbAmpFleet — multi-module manager: bus scan() (with collision detection), batched pollAll(), fleet-wide totalPower() / totalEnergyWh() / pollErrors(), General-Call sync (enableGcAll() / gcLatch() / checkSync()), assignAddress(), checkConflict(), and provision() for bringing a factory-fresh module onto the bus.
  • Identity / capability: readVariant(), readCapability(), readProductId(), readUid().
  • Event channel: readEventFlags(), clearEventFlags(), hasError(), clearError(), readLastError().
  • Per-channel CT configuration: configureChannels() (batched, one flash save) and readCTModelCh() (applied-model mirror read).
  • On-device fleet primitives: enableGc(), setGroupId(), readGroupId(), readGcTick(), readFleetConfig(), readLabel(), writeLabel(), saveUserConfig(), static broadcastLatchGroup().
  • 08_FleetSync example (scan → GC sync → aggregation).
  • RbAmpSnapshot.implausible per-field mask: a field that fails the physical-sanity filter is set to NaN and flagged, while the rest of the snapshot stays usable (the full read fails only on a transport failure).

Changed

  • Energy is integrated against the master wall-clock, never against the chip's diagnostic latch_ms (the chip timer undercounts by ~25-30%). On a stale period anchor, integration is held — the next valid window is not undercounted.
  • CT model codes follow the v1.3 per-class accepted set — Sct013 accepts {005, 010, 030, 050, 020}; SCT-013-100 and -060 are recognised SKUs but uncharacterised, and are rejected client-side. REG_CT_MODEL is pure staging: bind via the per-channel command, multi-channel binds are order-independent, and never clobber channel 0.
  • Address change is a production-OK two-phase magic commit; develop mode is not required.
  • Variant detection reads REG_HW_VARIANT; the constructor topology hint is now a fallback for pre-v1.3 firmware. The default hint is Single (safe — no spurious readings from absent channels).
  • I²C writes now share the same NACK-retry discipline as reads (a config write that silently drops on a contended bus is otherwise invisible).
  • setSensorClass() rejects out-of-enum classes client-side (firmware silently accepts a bad class, so the client guard is the only safeguard).

Notes

  • AVR: double is 32-bit (== float) on the classic AVR toolchain, so the Wh accumulator loses precision during long-soak logging — reset it periodically or use a 32/64-bit-double core (ESP32, SAMD, STM32, RP2040).
  • Marginal bus / ESP32: the Arduino-ESP32 Wire wraps a driver that can hang on a held bus below the library level. Use proper external ~4.7 kΩ pull-ups, avoid the debugger/NRST in production, and arm an app-level task-watchdog on the polling task as a recovery path.

1.0.0 — Initial release

Single-device RT metering (RMS U / I / P / PF / frequency), period energy (Wh) integration, CT-model + sensor-class configuration, and I²C-address change.

1.3.0 Fleet + v1.3 protocol 1.0.0 Initial release