add to do list, update readme

README.md

@@ -12,6 +12,19 @@ home: [nodemcu.com](http://www.nodemcu.com)<br />
 bbs: [中文论坛Chinese bbs](http://bbs.nodemcu.com)<br />
 Tencent QQ group QQ群: 309957875<br />
 
+# Summary
+- Easy to access wireless router
+- Based on Lua 5.1.4 (without *io, math, debug, os* module.)
+- Event-Drive programming preferred.
+- Build-in file, timer, pwm, i2c, 1-wire, net, gpio, wifi, adc, uart and system api.
+- GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
+
+# To Do List (pull requests are very welcomed)
+- fix wifi smart connect
+- add spi module
+- add mqtt module
+- add coap module
+
 # Change log
 2015-01-06<br />
 update sdk to 0.9.5.<br />
@@ -29,13 +42,6 @@ add tmr.time() api to get rtc time and calibration.
 
 [more change log](https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en#change_log)<br />
 [更多变更日志](https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_cn#change_log)
-# Summary
-- Easy to access wireless router
-- Based on Lua 5.1.4
-- Event-Drive programming preferred.
-- Build-in file, timer, pwm, i2c, 1-wire, net, gpio, wifi, adc, uart and system api.
-- GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
-- GPIO Map Table:
 
 ##GPIO NEW TABLE ( Build 20141219 and later)