* Update README.md and DS18B20 documents.

README.md

@@ -3,7 +3,7 @@
 version 0.9.2 build 2014-12-09
 # Change log
 2014-12-09<br />
-increase alarmer num in tmr module to 7.
+increased the number of alarm in tmr module, now it has 7 alarm. <br />
 
 2014-12-08<br />
 add uart.setup(), uart.write() api.<br />
@@ -164,6 +164,32 @@ braudrate:9600
        print("Welcome to NodeMcu world.")
     end)
 ```
+
+####Use DS18B20 module extends your NODEMCU
+```lua
+    -- read temperature with DS18B20
+    t=require("ds18b20")
+    t.setup(9)
+    addrs=t.addrs()
+    -- Total DS18B20 numbers, assume it is 2
+    print(table.getn(addrs))
+    -- The first DS18B20
+    print(t.read(addrs[1],t.C))
+    print(t.read(addrs[1],t.F))
+    print(t.read(addrs[1],t.K))
+    -- The second DS18B20
+    print(t.read(addrs[2],t.C))
+    print(t.read(addrs[2],t.F))
+    print(t.read(addrs[2],t.K))
+    -- Just read
+    print(t.read())
+    -- Just read as centigrade
+    print(t.read(nil,t.C))
+    -- Don't forget to release it after use
+    t = nil
+    package.loaded["ds18b20"]=nil   
+```
+
 #Check this out
 Tencent QQ group: 309957875<br/>
 [nodemcu wiki](https://github.com/nodemcu/nodemcu-firmware/wiki)<br/>

modules/ds18b20.CN.md

@@ -29,7 +29,7 @@ nil
 ```lua
 ds18b20 = require("ds18b20")
 ds18b20.setup(9)
--- Don't forget release it after use
+-- Don't forget to release it after use
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
 
@@ -60,7 +60,7 @@ addrs = ds18b20.addrs()
 if (addrs ~= nil) then
   print("Total DS18B20 sensors: "..table.getn(addrs))
 end
--- Don't forget release it after use
+-- Don't forget to release it after use
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
 
@@ -107,7 +107,7 @@ print(t.readNumber())
 print(t.readNumber(nil,t.F))
 -- Read as values
 t1, t2 = t.readNumber()
--- Don't forget release it after use
+-- Don't forget to release it after use
 t = nil
 package.loaded["ds18b20"]=nil
 
@@ -149,7 +149,7 @@ print(t.read(addrs[2],t.K))
 print(t.read())
 -- Just read as centigrade
 print(t.read(nil,t.C))
--- Don't forget release it after use
+-- Don't forget to release it after use
 t = nil
 package.loaded["ds18b20"]=nil
 ```

modules/ds18b20.EN.md

@@ -29,7 +29,7 @@ nil
 ```lua
 ds18b20 = require("ds18b20")
 ds18b20.setup(9)
--- Don't forget release it after use
+-- Don't forget to release it after use
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
 ```
@@ -59,7 +59,7 @@ addrs = ds18b20.addrs()
 if (addrs ~= nil) then
   print("Total DS18B20 sensors: "..table.getn(addrs))
 end
--- Don't forget release it after use
+-- Don't forget to release it after use
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
 ```
@@ -105,7 +105,7 @@ print(t.readNumber())
 print(t.readNumber(nil,t.F))
 -- Read as values
 t1, t2 = t.readNumber()
--- Don't forget release it after use
+-- Don't forget to release it after use
 t = nil
 package.loaded["ds18b20"]=nil
 ```
@@ -146,7 +146,7 @@ print(t.read(addrs[2],t.K))
 print(t.read())
 -- Just read as centigrade
 print(t.read(nil,t.C))
--- Don't forget release it after use
+-- Don't forget to release it after use
 t = nil
 package.loaded["ds18b20"]=nil
 ```