add bed cooler project.

src/core/device.cpp

@@ -0,0 +1,68 @@
+#include "app.h"
+
+#include <ESPmDNS.h>
+#include <LittleFS.h>
+
+void applyLed() {
+  uint8_t pct = constrain(ledBrightness, 0, 100);
+  uint8_t duty = map(pct, 0, 100, 0, 255);
+  if (ledInverted) duty = 255 - duty;
+  analogWrite(LED_BUILTIN, duty);
+}
+
+void factoryReset() {
+  prefs.clear();
+  LittleFS.remove(LOG_FILE_PATH);
+  appendLog(LOG_SECURITY_AUDIT, "factory reset requested");
+}
+
+void checkFactoryResetPin() {
+  pinMode(FACTORY_RESET_PIN, INPUT_PULLUP);
+  if (digitalRead(FACTORY_RESET_PIN) != FACTORY_RESET_ACTIVE_LEVEL) return;
+  uint32_t start = millis();
+  while (millis() - start < FACTORY_RESET_HOLD_MS) {
+    delay(100);
+    if (digitalRead(FACTORY_RESET_PIN) != FACTORY_RESET_ACTIVE_LEVEL) {
+      return;
+    }
+  }
+  factoryReset();
+  ESP.restart();
+}
+
+bool connectWifi() {
+  String ssid = prefString("wifiSsid", "");
+  String pass = prefString("wifiPass", "");
+  if (!ssid.length()) return false;
+  String name = deviceName();
+  WiFi.mode(WIFI_STA);
+  WiFi.setHostname(name.c_str());
+  if (!networkDhcp) {
+    IPAddress ip;
+    IPAddress gateway;
+    IPAddress subnet;
+    IPAddress dns1;
+    IPAddress dns2;
+    bool ok = ip.fromString(networkIp) && gateway.fromString(networkGateway) && subnet.fromString(networkSubnet);
+    if (ok) {
+      if (!networkDns1.length() || !dns1.fromString(networkDns1)) dns1 = gateway;
+      if (!networkDns2.length() || !dns2.fromString(networkDns2)) dns2 = IPAddress(0, 0, 0, 0);
+      if (!WiFi.config(ip, gateway, subnet, dns1, dns2)) appendLog(LOG_WARN, "static IP configuration failed; continuing with DHCP");
+    } else {
+      appendLog(LOG_WARN, "static IP configuration is incomplete or invalid; continuing with DHCP");
+    }
+  }
+  WiFi.begin(ssid.c_str(), pass.c_str());
+  appendLog(LOG_INFO, "connecting to WiFi " + ssid);
+  uint32_t start = millis();
+  while (WiFi.status() != WL_CONNECTED && millis() - start < 20000) {
+    delay(250);
+  }
+  if (WiFi.status() == WL_CONNECTED) {
+    MDNS.begin(name.c_str());
+    appendLog(LOG_INFO, "WiFi connected " + WiFi.localIP().toString());
+    return true;
+  }
+  appendLog(LOG_WARN, "WiFi connection failed; entering setup AP");
+  return false;
+}