New firmware/esp32p4-sensor-node/ ESP-IDF (C, FreeRTOS) project skeleton
per docs/superpowers/specs/2026-07-23-esp32-sensor-node-design.md's
Workstream I:
- Wi-Fi station-mode connect with exponential-backoff reconnect
(wifi_manager.c), credentials from a gitignored main/device_config.h
the seeker fills in (template: device_config.h.example).
- Telemetry HTTP client (telemetry_client.c) POSTing the spec's exact
contract shape to /api/device/telemetry with a Bearer token, via
esp_http_client + cJSON.
- BME280 I2C driver (bme280.c) with Bosch's public double-precision
compensation formulas, using ESP-IDF's newer driver/i2c_master.h API.
- LD2410 mmWave presence driver (ld2410.c) over UART, chosen over a
plain PIR for its distance/motion data richness — its frame-offset
parsing is flagged as the least-certain code in the firmware.
- sensor_driver_t registry (sensor_driver.h, sensor_registry.c) so new
sensors are a new driver file + one array line, no main-loop changes.
- README.md: build steps, manual-config walkthrough, wiring/pinouts,
and an explicit "what's verified vs. not" section plus a real
hardware caveat (ESP32-P4 has no integrated Wi-Fi radio).
UNVERIFIED AGAINST REAL HARDWARE per the spec's honesty-policy note —
no ESP-IDF toolchain or physical boards available in this environment.
Syntax-checked with gcc against hand-written ESP-IDF API stubs (not
committed) as a best-effort substitute for a real idf.py build.
Workstream J (RTL-SDR experimental module) is explicitly out of scope
here; firmware/esp32p4-sensor-node/components/ is left in place for it.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
