DS3231 (I2C 0x68):
- New velxio-ds3231 Web Component (4-pin module: GND/VCC/SDA/SCL) with
pinInfo per CLAUDE.md 6a; registered in elements-register + main.tsx.
- Catalog entry in scripts/component-overrides.json (_customComponents)
mirrored into components-metadata.json exactly as the generator emits it
(verified by cloning wokwi-elements and running generate:metadata: zero drift).
- The existing VirtualDS3231 device sim (DS1307-compatible time regs
0x00-0x06 + control 0x0E / status 0x0F / temperature 0x11-0x12 at 0.25 C
steps) is now user-reachable from the picker; the AVR/RP2040 attach path
gains live temperature updates via the SensorControlPanel (new ds3231
slider in sensorControlConfig).
GPS NEO-6M (UART talker, 9600 baud):
- New velxio-gps-neo6m Web Component (VCC/RX/TX/GND, pulsing PPS LED).
- New part sim GpsParts.ts: emits a valid GPGGA+GPRMC cycle per second
(correct XOR checksums, ddmm.mmmmm coords, UTC clock advancing 1 s/cycle)
with lat/lng/altitude/speed configurable via property dialog and live
via a new SensorControlPanel entry. Defaults: Madrid 40.4168 N 3.7038 W.
- Injection routes, chosen by classifying the wired board pin:
1) hardware UART RX -> new uniform sim.feedUart(uart, data) seam
(AVR USART0, RP2040 uart0/1 via rp2040js feedByte, ESP32 uart0/2 and
STM32 USART1/2 via their bridge shims); byte feed is paced in 8-byte
wall-clock chunks so 32-byte RX FIFOs never overflow;
2) any other digital pin on a cycle-accurate sim -> real 8N1 bit-banged
waveform via schedulePinChange, so SoftwareSerial decodes it;
3) feedUart rejection (e.g. Mega USART1-3, not modelled by avr8js)
degrades permanently to the bit-banged path.
- Interconnect already probed sim.feedUart; implementing it also upgrades
cross-board UART byte shortcuts for RP2040 uart1.
Tests: new gps-neo6m.test.ts (16 tests: NMEA builders, byte injection on
Uno RX0 / ESP32 RX2, Mega RX1 fallback, waveform decode back to $GPGGA,
live position updates, PPS pulse) + 3 new ds3231 AVR-path tests in
protocol-parts.test.ts. Full frontend suite: 2294 passed, 2 pre-existing
Galaksija Z80 timeouts that pass in isolation. npx tsc --noEmit clean.
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