Captive portal fixes (#766)

* Enable MDNS logs comment

* Work around ESP8266 mDNS broken for AP

See also https://github.com/esp8266/Arduino/issues/6114

* Enable captive_portal in AP-only mode

Fixes https://github.com/esphome/issues/issues/671

* Make ESP32 connecting faster

See also https://github.com/espressif/arduino-esp32/pull/2989

* Format

esphome/components/logger/__init__.py

@@ -123,6 +123,8 @@ def to_code(config):
             'TLS_MEM',
             'UPDATER',
             'WIFI',
+            # Spams logs too much:
+            # 'MDNS_RESPONDER',
         }
         for comp in DEBUG_COMPONENTS:
             cg.add_build_flag("-DDEBUG_ESP_{}".format(comp))

esphome/components/wifi/wifi_component.cpp

@@ -49,10 +49,16 @@ void WiFiComponent::setup() {
     }
   } else if (this->has_ap()) {
     this->setup_ap_config_();
+#ifdef USE_CAPTIVE_PORTAL
+    if (captive_portal::global_captive_portal != nullptr)
+      captive_portal::global_captive_portal->start();
+#endif
   }
 
   this->wifi_apply_hostname_();
+#ifdef ARDUINO_ARCH_ESP32
   network_setup_mdns();
+#endif
 }
 
 void WiFiComponent::loop() {
@@ -103,6 +109,7 @@ void WiFiComponent::loop() {
         ESP_LOGI(TAG, "Starting fallback AP!");
         this->setup_ap_config_();
 #ifdef USE_CAPTIVE_PORTAL
+        if (captive_portal::global_captive_portal != nullptr)
           captive_portal::global_captive_portal->start();
 #endif
       }
@@ -157,6 +164,9 @@ void WiFiComponent::setup_ap_config_() {
 
   this->ap_setup_ = this->wifi_start_ap_(this->ap_);
   ESP_LOGCONFIG(TAG, "  IP Address: %s", this->wifi_soft_ap_ip().toString().c_str());
+#ifdef ARDUINO_ARCH_ESP8266
+  network_setup_mdns(this->wifi_soft_ap_ip(), 1);
+#endif
 
   if (!this->has_sta()) {
     this->state_ = WIFI_COMPONENT_STATE_AP;
@@ -416,6 +426,9 @@ void WiFiComponent::check_connecting_finished() {
       ESP_LOGD(TAG, "Disabling AP...");
       this->wifi_mode_({}, false);
     }
+#ifdef ARDUINO_ARCH_ESP8266
+    network_setup_mdns(this->wifi_sta_ip_(), 0);
+#endif
     this->state_ = WIFI_COMPONENT_STATE_STA_CONNECTED;
     this->num_retried_ = 0;
     return;

esphome/components/wifi/wifi_component_esp32.cpp

@@ -162,11 +162,17 @@ bool WiFiComponent::wifi_sta_connect_(WiFiAP ap) {
     conf.sta.channel = *ap.get_channel();
   }
 
-  esp_err_t err = esp_wifi_disconnect();
+  wifi_config_t current_conf;
+  esp_err_t err;
+  esp_wifi_get_config(WIFI_IF_STA, &current_conf);
+
+  if (memcmp(&current_conf, &conf, sizeof(wifi_config_t)) != 0) {
+    err = esp_wifi_disconnect();
     if (err != ESP_OK) {
       ESP_LOGV(TAG, "esp_wifi_disconnect failed! %d", err);
       return false;
     }
+  }
 
   err = esp_wifi_set_config(WIFI_IF_STA, &conf);
   if (err != ESP_OK) {

esphome/core/util.cpp

@@ -2,6 +2,7 @@
 #include "esphome/core/defines.h"
 #include "esphome/core/application.h"
 #include "esphome/core/version.h"
+#include "esphome/core/log.h"
 
 #ifdef USE_WIFI
 #include "esphome/components/wifi/wifi_component.h"
@@ -38,8 +39,23 @@ bool network_is_connected() {
   return false;
 }
 
+#ifdef ARDUINO_ARCH_ESP8266
+bool mdns_setup;
+#endif
+
+#ifdef ARDUINO_ARCH_ESP8266
+void network_setup_mdns(IPAddress address, int interface) {
+  // Latest arduino framework breaks mDNS for AP interface
+  // see https://github.com/esp8266/Arduino/issues/6114
+  if (interface == 1)
+    return;
+  MDNS.begin(App.get_name().c_str(), address);
+  mdns_setup = true;
+#endif
+#ifdef ARDUINO_ARCH_ESP32
   void network_setup_mdns() {
     MDNS.begin(App.get_name().c_str());
+#endif
 #ifdef USE_API
     if (api::global_api_server != nullptr) {
       MDNS.addService("esphomelib", "tcp", api::global_api_server->get_port());
@@ -58,6 +74,7 @@ void network_setup_mdns() {
   }
   void network_tick_mdns() {
 #ifdef ARDUINO_ARCH_ESP8266
+    if (mdns_setup)
       MDNS.update();
 #endif
   }

esphome/core/util.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <string>
+#include "IPAddress.h"
 
 namespace esphome {
 
@@ -10,7 +11,12 @@ bool network_is_connected();
 std::string network_get_address();
 
 /// Manually set up the network stack (outside of the App.setup() loop, for example in OTA safe mode)
+#ifdef ARDUINO_ARCH_ESP8266
+void network_setup_mdns(IPAddress address, int interface);
+#endif
+#ifdef ARDUINO_ARCH_ESP32
 void network_setup_mdns();
+#endif
 void network_tick_mdns();
 
 }  // namespace esphome