From 349bc68180cbc1d06dee6d2f02ab94e0f5c3f665 Mon Sep 17 00:00:00 2001
From: Pavel Brychta <pavel.brychta@post.cz>
Date: Tue, 7 Apr 2020 07:30:51 +0200
Subject: [PATCH] Oprava padu ESP32 pri pokusu o iskani adresy pres DHCP (odkaz
 na popis chyby do githubu je v kodu)

---
 src/WiFiConfig.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/WiFiConfig.cpp b/src/WiFiConfig.cpp
index 953d592..9b8797f 100644
--- a/src/WiFiConfig.cpp
+++ b/src/WiFiConfig.cpp
@@ -700,6 +700,7 @@ wificonfigresult_t WiFiConfig::_setupAP(wificonfig_cb cb)
     WiFi.disconnect(); // pro jistotu se odpojime
 //    WiFi.mode(WIFI_AP);
 
+#if defined(ARDUINO_ARCH_ESP8266)
     WiFi.softAPConfig(apIP, apIP, netMsk);
     if (ssid.endsWith(F("?"))) {
         char lmac[16];
@@ -710,7 +711,17 @@ wificonfigresult_t WiFiConfig::_setupAP(wificonfig_cb cb)
     WiFi.softAP(ssid.c_str(), NULL, SETUP_CHANNEL);
     WiFi.mode(WIFI_AP);
     delay(500); // dulezite - jinak se nevraci spravna IP adresa !!! (udajne od verze 2.3.0 uz neni nutne)
+#else
+    // osetreni padu ESP32 - https://github.com/espressif/arduino-esp32/issues/2025
+    if (ssid.endsWith(F("?"))) {
+        char lmac[16];
 
+        sprintf_P(lmac, PSTR("%06X"), ESP_getChipId());
+        ssid.replace(F("?"), String(lmac));
+    }
+    WiFi.softAP(ssid.c_str(), NULL, SETUP_CHANNEL);
+    WiFi.softAPConfig(apIP, apIP, netMsk);
+#endif
     dnsServer->setErrorReplyCode(DNSReplyCode::NoError);
     dnsServer->start(DNS_PORT, "*", WiFi.softAPIP()); // spustime tzv. Captive portal - vsechny DNS dotazy jsou smerovany na nasi ip adresu
     if (cb)