From e39db81ca33db92f04012503cbc3270c2585c7dd Mon Sep 17 00:00:00 2001
From: Alex <alex@root1.de>
Date: Sun, 12 Jun 2016 12:49:26 +0200
Subject: [PATCH] Added a hook to user_init in core_esp8266_main.c to be able
 to do very early things, like disabling wifi

see: https://github.com/esp8266/Arduino/issues/2111#issuecomment-224251391
---
 cores/esp8266/core_esp8266_main.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cores/esp8266/core_esp8266_main.cpp b/cores/esp8266/core_esp8266_main.cpp
index 0c1eb02bfe..d04c2e71ee 100644
--- a/cores/esp8266/core_esp8266_main.cpp
+++ b/cores/esp8266/core_esp8266_main.cpp
@@ -134,6 +134,7 @@ void init_done() {
     esp_schedule();
 }
 
+extern void early_init();
 
 extern "C" void user_init(void) {
     struct rst_info *rtc_info_ptr = system_get_rst_info();
@@ -152,4 +153,7 @@ extern "C" void user_init(void) {
         LOOP_QUEUE_SIZE);
 
     system_init_done_cb(&init_done);
+    
+    // early init stuff from user sketch
+    early_init();
 }