# DeskLock

A living-room visual/audio endpoint for **Tatlock**, the homelab butler. DeskLock gives
Tatlock a face and a voice on a Waveshare round touch display: you talk to it, it listens,
thinks, and answers — the first line of contact with the butler backend running on
tower-of-joy.

## Hardware

**Waveshare ESP32-P4-WIFI6-Touch-LCD-3.4C**

| Component | Details |
|-----------|---------|
| SoC | ESP32-P4NRW32 — dual-core RISC-V @ 400 MHz + LP core |
| Memory | 32 MB PSRAM (in-package), 32 MB NOR flash |
| Display | 3.4" round IPS, 800×800, MIPI-DSI 2-lane, capacitive touch |
| Radio | ESP32-C6-MINI-1 (Wi-Fi 6 + BLE 5) over SDIO via ESP-Hosted |
| Audio in | Dual onboard microphones + ES7210 echo-cancellation ADC |
| Audio out | ES8311 codec, PH2.0 2-pin speaker connector (8Ω 2W recommended) |
| Flashing | USB-C (hold BOOT during reset for download mode) |

The device is currently connected over USB-C directly to tower-of-joy, so build/flash
happens on this server.

## Architecture

```
┌─────────────────────┐        WebSocket (PCM audio + JSON events)
│  DeskLock device    │◄──────────────────────────────────────────┐
│  (ESP32-P4)         │                                           │
│                     │        ┌──────────────────────────────────┴──┐
│  • LVGL face        │        │  DeskLock Gateway (container)        │
│  • Touch input      │        │  on tower-of-joy                     │
│  • Mic capture+AEC  │        │                                      │
│  • TTS playback     │        │  • STT: faster-whisper (GPU)         │
└─────────────────────┘        │  • TTS: Piper                        │
                               │  • Chat: Tatlock /v1/chat/completions│
                               └──────────────────┬───────────────────┘
                                                  │ HTTP (LAN, :8000)
                                       ┌──────────┴──────────┐
                                       │  Tatlock (butler)   │
                                       │  tatlock.schweitz.  │
                                       │  internal           │
                                       └─────────────────────┘
```

Tatlock stays a text-only brain. The **gateway** is Tatlock's ears and mouth: it converts
speech to text on the way in and text to speech on the way out, keeping the device firmware
thin (audio transport + face rendering only).

See [docs/architecture.md](docs/architecture.md) for the full design.

## Repository layout

- `firmware/` — ESP-IDF (C, LVGL 9) application for the ESP32-P4
- `gateway/` — Python FastAPI voice gateway, deployed as a container on tower-of-joy
- `docs/` — architecture and design notes

## Roadmap

1. **Bring-up** — ESP-IDF toolchain, build/flash, BSP display + Wi-Fi working
2. **Face** — LVGL face with idle/listening/thinking/speaking states, clock while idle
3. **Voice (touch-to-talk)** — tap to talk → gateway → Tatlock → spoken reply
4. **Wake word** — esp-sr WakeNet on-device, echo cancellation, barge-in
5. **Polish** — Tatlock-initiated notifications, presence, OTA updates

## References

- [Waveshare wiki: ESP32-P4-WIFI6-Touch-LCD-3.4C](https://www.waveshare.com/wiki/ESP32-P4-WIFI6-Touch-LCD-3.4C)
- [Official examples repo (waveshareteam/ESP32-P4-WIFI6-Touch-LCD-XC)](https://github.com/waveshareteam/ESP32-P4-WIFI6-Touch-LCD-XC)
- [BSP component: waveshare/esp32_p4_wifi6_touch_lcd_xc](https://components.espressif.com/components/waveshare/esp32_p4_wifi6_touch_lcd_xc)
- Tatlock backend: `/mnt/media/Projects/tatlock` — https://tatlock.schweitz.net