nodemcu/nodemcu-firmware 2.1.0-master_20170521

on GitHub

• Upgrade to SDK 2.1.0
• Full support for >4MB flash chips
• New modules: ADS1115, Si7021, HDC1080, TCS34725, XPT2046 touch controller
• Streaming JSON module SJSON replaces CJSON
• wifi.suspend(), node.sleep() and improved node.dsleep() help reduce power consumption
• TIME_WAIT socket fixes

Take a look at the 2.1 milestone for the full list of all issues included in this release.