feat(boards): add ESP32-32E-4 (4" ST7796) board support

boards/esp32-32e-4/DisplayDriverTFT.cpp

@@ -0,0 +1,178 @@
+#include "DisplayDriverTFT.h"
+
+void DisplayDriverTFT::begin() {
+    // Backlight
+    pinMode(PIN_LCD_BL, OUTPUT);
+    digitalWrite(PIN_LCD_BL, LOW);
+
+    _tft.init();
+    _tft.setRotation(DISPLAY_ROTATION);
+    _tft.fillScreen(TFT_BLACK);
+
+    Serial.printf("[GFX] Display OK: %dx%d\n", DISPLAY_WIDTH, DISPLAY_HEIGHT);
+
+    drawBoot();
+
+    digitalWrite(PIN_LCD_BL, HIGH);
+    Serial.println("[GFX] Backlight ON");
+}
+
+void DisplayDriverTFT::setBacklight(bool on) { digitalWrite(PIN_LCD_BL, on ? HIGH : LOW); }
+
+// ── Rendering ───────────────────────────────────────────────
+
+void DisplayDriverTFT::render(const ScreenState& st) {
+    if(st.screen != _lastScreen) {
+        _needsRedraw = true;
+        _lastScreen = st.screen;
+    }
+
+    switch(st.screen) {
+    case ScreenID::BOOT:
+        if(_needsRedraw) {
+            drawBoot();
+            _needsRedraw = false;
+        }
+        break;
+    case ScreenID::ALERT:
+        drawAlert(st);
+        break;
+
+    case ScreenID::DASHBOARD:
+        if(_needsRedraw) {
+            drawDashboard(st);
+            _needsRedraw = false;
+        }
+        break;
+    case ScreenID::OFF:
+        if(_needsRedraw) {
+            _tft.fillScreen(TFT_BLACK);
+            _needsRedraw = false;
+        }
+        break;
+    }
+}
+
+void DisplayDriverTFT::drawBoot() {
+    _tft.fillScreen(TFT_BLACK);
+    _tft.setTextColor(TFT_WHITE, TFT_BLACK);
+    _tft.setTextSize(2);
+    _tft.setCursor(10, 10);
+    _tft.printf("KLUBHAUS v%s", FW_VERSION);
+    _tft.setTextSize(1);
+    _tft.setCursor(10, 40);
+    _tft.print(BOARD_NAME);
+    _tft.setCursor(10, 60);
+    _tft.print("Booting...");
+}
+
+void DisplayDriverTFT::drawAlert(const ScreenState& st) {
+    uint32_t elapsed = millis() - st.alertStartMs;
+    uint8_t pulse = 180 + (uint8_t)(75.0f * sinf(elapsed / 300.0f));
+    uint16_t bg = _tft.color565(pulse, 0, 0);
+
+    _tft.fillScreen(bg);
+    _tft.setTextColor(TFT_WHITE, bg);
+
+    _tft.setTextSize(3);
+    _tft.setCursor(10, 20);
+    _tft.print(st.alertTitle.length() > 0 ? st.alertTitle : "ALERT");
+
+    _tft.setTextSize(2);
+    _tft.setCursor(10, 80);
+    _tft.print(st.alertBody);
+
+    _tft.setTextSize(1);
+    _tft.setCursor(10, DISPLAY_HEIGHT - 20);
+    _tft.print("Hold to silence...");
+}
+
+void DisplayDriverTFT::drawDashboard(const ScreenState& st) {
+    _tft.fillScreen(TFT_BLACK);
+    _tft.setTextColor(TFT_WHITE, TFT_BLACK);
+
+    _tft.setTextSize(1);
+    _tft.setCursor(5, 5);
+    _tft.printf("KLUBHAUS — %s", deviceStateStr(st.deviceState));
+
+    int y = 30;
+    _tft.setCursor(5, y);
+    y += 18;
+    _tft.printf("WiFi: %s  %ddBm", st.wifiSsid.c_str(), st.wifiRssi);
+
+    _tft.setCursor(5, y);
+    y += 18;
+    _tft.printf("IP: %s", st.ipAddr.c_str());
+
+    _tft.setCursor(5, y);
+    y += 18;
+    _tft.printf("Up: %lus  Heap: %d", st.uptimeMs / 1000, ESP.getFreeHeap());
+
+    _tft.setCursor(5, y);
+    y += 18;
+    _tft.printf("Last poll: %lus ago", st.lastPollMs > 0 ? (millis() - st.lastPollMs) / 1000 : 0);
+}
+
+// ── Touch ───────────────────────────────────────────────────
+
+TouchEvent DisplayDriverTFT::readTouch() {
+    TouchEvent evt;
+    uint16_t tx, ty;
+    if(_tft.getTouch(&tx, &ty)) {
+        evt.pressed = true;
+        evt.x = tx;
+        evt.y = ty;
+    }
+    return evt;
+}
+
+int DisplayDriverTFT::dashboardTouch(int x, int y) {
+    // 2x2 grid, accounting for 30px header
+    if(y < 30)
+        return -1;
+
+    int col = (x * 2) / DISPLAY_WIDTH; // 0 or 1
+    int row = ((y - 30) * 2) / (DISPLAY_HEIGHT - 30); // 0 or 1
+
+    if(col < 0 || col > 1 || row < 0 || row > 1)
+        return -1;
+
+    return row * 2 + col; // 0, 1, 2, or 3
+}
+
+HoldState DisplayDriverTFT::updateHold(unsigned long holdMs) {
+    HoldState h;
+    TouchEvent t = readTouch();
+
+    if(t.pressed) {
+        if(!_holdActive) {
+            _holdActive = true;
+            _holdStartMs = millis();
+            h.started = true;
+        }
+        uint32_t held = millis() - _holdStartMs;
+        h.active = true;
+        h.progress = constrain((float)held / (float)holdMs, 0.0f, 1.0f);
+        h.completed = (held >= holdMs);
+
+        // Simple progress bar at bottom of screen
+        int barW = (int)(DISPLAY_WIDTH * h.progress);
+        _tft.fillRect(0, DISPLAY_HEIGHT - 8, barW, 8, TFT_WHITE);
+        _tft.fillRect(barW, DISPLAY_HEIGHT - 8, DISPLAY_WIDTH - barW, 8, TFT_DARKGREY);
+    } else {
+        if(_holdActive) {
+            // Clear the progress bar when released
+            _tft.fillRect(0, DISPLAY_HEIGHT - 8, DISPLAY_WIDTH, 8, TFT_DARKGREY);
+        }
+        _holdActive = false;
+    }
+    return h;
+}
+
+void DisplayDriverTFT::updateHint(int x, int y, bool active) {
+    float period = active ? 500.0f : 2000.0f;
+    float t = fmodf(millis(), period) / period;
+    uint8_t v = static_cast<uint8_t>(30.0f + 30.0f * sinf(t * 2.0f * PI));
+    uint16_t col = _tft.color565(v, v, v);
+    _tft.drawRect(x - 40, y - 20, 80, 40, col);
+}

boards/esp32-32e-4/DisplayDriverTFT.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "board_config.h"
+
+#include <KlubhausCore.h>
+#include <TFT_eSPI.h>
+
+class DisplayDriverTFT : public IDisplayDriver {
+public:
+    void begin() override;
+    void setBacklight(bool on) override;
+    void render(const ScreenState& state) override;
+    TouchEvent readTouch() override;
+    int dashboardTouch(int x, int y) override;
+    HoldState updateHold(unsigned long holdMs) override;
+    void updateHint(int x, int y, bool active) override;
+    int width() override { return DISPLAY_WIDTH; }
+    int height() override { return DISPLAY_HEIGHT; }
+
+private:
+    void drawBoot();
+    void drawAlert(const ScreenState& st);
+    void drawDashboard(const ScreenState& st);
+
+    TFT_eSPI _tft;
+
+    bool _holdActive = false;
+    uint32_t _holdStartMs = 0;
+    ScreenID _lastScreen = ScreenID::BOOT;
+    bool _needsRedraw = true;
+};

boards/esp32-32e-4/board_config.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#define BOARD_NAME "WS_32E_4"
+
+// ══════════════════════════════════════════════════════════
+//  Hosyond ESP32-32E 4" (320x480) with ST7796 + XPT2046
+//  Pin mapping from lcdwiki.com/4.0inch_ESP32-32E_Display
+// ══════════════════════════════════════════════════════════
+
+#define DISPLAY_WIDTH 320
+#define DISPLAY_HEIGHT 480
+#define DISPLAY_ROTATION 1 // landscape
+
+// Backlight GPIO (HIGH = on)
+#define PIN_LCD_BL 27
+
+// Touch — XPT2046 configured in tft_user_setup.h
+// Touch CS: GPIO33, Touch IRQ: GPIO36

boards/esp32-32e-4/esp32-32e-4.ino

@@ -0,0 +1,71 @@
+//
+// Klubhaus Doorbell — ESP32-32E-4" target
+//
+
+#include "DisplayDriverTFT.h"
+#include "board_config.h"
+#include "secrets.h"
+
+#include <KlubhausCore.h>
+
+DisplayDriverTFT tftDriver;
+DisplayManager display(&tftDriver);
+DoorbellLogic logic(&display);
+
+void setup() {
+    Serial.begin(115200);
+    delay(500);
+
+    logic.begin(FW_VERSION, BOARD_NAME, wifiNetworks, wifiNetworkCount);
+    logic.finishBoot();
+}
+
+void loop() {
+    // ── State machine tick ──
+    logic.update();
+
+    // ── Render current screen ──
+    display.render(logic.getScreenState());
+
+    // ── Touch handling ──
+    const ScreenState& st = logic.getScreenState();
+    static int holdStartX = -1;
+    static int holdStartY = -1;
+
+    if(st.deviceState == DeviceState::ALERTING) {
+        HoldState h = display.updateHold(HOLD_TO_SILENCE_MS);
+        if(h.completed) {
+            logic.silenceAlert();
+            holdStartX = -1;
+            holdStartY = -1;
+        }
+        if(h.started) {
+            TouchEvent t = display.readTouch();
+            holdStartX = t.x;
+            holdStartY = t.y;
+        }
+        if(holdStartX >= 0) {
+            display.updateHint(holdStartX, holdStartY, h.active);
+        }
+    } else {
+        holdStartX = -1;
+        holdStartY = -1;
+    }
+
+    if(st.screen == ScreenID::DASHBOARD) {
+        TouchEvent evt = display.readTouch();
+        if(evt.pressed) {
+            int tile = display.dashboardTouch(evt.x, evt.y);
+            if(tile >= 0)
+                Serial.printf("[DASH] Tile %d tapped\n", tile);
+        }
+    }
+
+    // ── Serial console ──
+    if(Serial.available()) {
+        String cmd = Serial.readStringUntil('\n');
+        cmd.trim();
+        if(cmd.length() > 0)
+            logic.onSerialCommand(cmd);
+    }
+}

boards/esp32-32e-4/secrets.h.example

@@ -0,0 +1,11 @@
+#pragma once
+#include <KlubhausCore.h>
+
+// Copy this file to secrets.h and fill in your credentials.
+// secrets.h is gitignored.
+
+static const WiFiCred wifiNetworks[] = {
+    { "Your_SSID_1", "password1" },
+    { "Your_SSID_2", "password2" },
+};
+static const int wifiNetworkCount = sizeof(wifiNetworks) / sizeof(wifiNetworks[0]);

boards/esp32-32e-4/tft_user_setup.h

@@ -0,0 +1,43 @@
+// ══════════════════════════════════════════════════════════
+//  TFT_eSPI User_Setup for ESP32-32E-4" (Hosyond 320x480)
+//  This file is copied over vendor/esp32-32e-4/TFT_eSPI/User_Setup.h
+//  by the install-libs-32e-4 task.
+// ══════════════════════════════════════════════════════════
+
+#define USER_SETUP_ID 201
+
+// ── Driver ──
+#define ST7796_DRIVER
+
+// ── Resolution ──
+#define TFT_WIDTH 320
+#define TFT_HEIGHT 480
+
+// ── SPI Pins (from lcdwiki.com/4.0inch_ESP32-32E_Display) ──
+#define TFT_MOSI 13
+#define TFT_SCLK 14
+#define TFT_CS 15
+#define TFT_DC 2
+#define TFT_RST -1 // tied to EN, handled by board
+
+// ── Backlight ──
+#define TFT_BL 27
+#define TFT_BACKLIGHT_ON HIGH
+
+// ── Touch (XPT2046 resistive) ──
+#define TOUCH_CS 33
+
+// ── SPI speed ──
+#define SPI_FREQUENCY 40000000
+#define SPI_READ_FREQUENCY 20000000
+#define SPI_TOUCH_FREQUENCY 2500000
+
+// ── Misc ──
+#define LOAD_GLCD
+#define LOAD_FONT2
+#define LOAD_FONT4
+#define LOAD_FONT6
+#define LOAD_FONT7
+#define LOAD_FONT8
+#define LOAD_GFXFF
+#define SMOOTH_FONT