diff --git a/BigBoxOfArduino.md b/BigBoxOfArduino.md
index 9b4c772..fe1306d 100644
--- a/BigBoxOfArduino.md
+++ b/BigBoxOfArduino.md
@@ -2,3 +2,4 @@
 This box contains a bunch of arduino and friends related things.
 
  - [esp8266 reference](http://esp8266.github.io/Arduino/versions/2.2.0/doc/reference.html) - An extraordinarily hard page to find. This is the reference page for the esp8266 API - which is separate to the Arduino SHIELD api.
+    - [esp8266 WiFi reference](http://esp8266.github.io/Arduino/versions/2.2.0/doc/libraries.html#wifi-esp8266wifi-library)