legacy: restore persistence

Author: d-a-v

libraries/ESP8266WiFi/src/ESP8266WiFiGeneric.h

@@ -120,7 +120,7 @@ class ESP8266WiFiGenericClass {
 
  void setOutputPower(float dBm);
 
- void persistent(bool persistent);
+ static void persistent(bool persistent);
 
  bool mode(WiFiMode_t, WiFiState* state = nullptr);
  WiFiMode_t getMode();

cores/esp8266/enable_wifi_at_boot_time.cpp renamed to libraries/ESP8266WiFi/src/enable_wifi_at_boot_time.cpp

@@ -4,6 +4,8 @@
 
 #include "coredecls.h"
 
+#include <ESP8266WiFi.h>
+
 extern "C" void enableWiFiAtBootTime()
 {
  /*
@@ -16,5 +18,11 @@ extern "C" void enableWiFiAtBootTime()
 extern "C" void __disableWiFiAtBootTime()
 {
  // overrides the default __disableWiFiAtBootTime:
- // Does nothing: WiFi is enabled by default in nonos-sdk
+ // Does (almost) nothing: WiFi is enabled by default in nonos-sdk
+
+ // ... but restores legacy WiFi credentials persistence to true at boot time
+ // (can be still overriden by user before setting up WiFi, like before)
+
+ // (note: c++ ctors not called yet at this point)
+ ESP8266WiFiClass::persistent(true);
 }