Transferred cjson module documentation.

docs/en/modules/cjson.md

@@ -0,0 +1,50 @@
+# cjson Module
+
+The JSON support module. Allows encoding and decoding to/from JSON.
+
+Please note that nested tables can require a lot of memory to encode. To catch out-of-memory errors, use `pcall()`.
+
+## cjson.encode()
+
+Encode a Lua table to a JSON string.
+
+####Syntax
+`cjson.encode(table)`
+
+####Parameters
+  - `table`: data to encode
+
+While it also is possible to encode plain strings and numbers rather than a table, it is not particularly useful to do so.
+
+####Returns
+string:in json format
+
+####Example
+```lua
+ok, json = pcall(cjson.encode, {key="value"})
+if ok then
+  print(json)
+else
+  print("failed to encode!")
+end
+```
+___
+## cjson.decode()
+
+Decode a JSON string to a Lua table.
+
+####Syntax
+`cjson.decode(str)`
+
+####Parameters
+  - `str`: The JSON string to decode
+
+####Returns
+table:Lua representation of the JSON data
+
+####Example
+```lua
+t = cjson.decode('{"key":"value"}')
+for k,v in pairs(t) do print(k,v) end
+```
+___

mkdocs.yml

@@ -31,6 +31,7 @@ pages:
     - Modules:
         - 'adc': 'en/modules/adc.md'
         - 'bit': 'en/modules/bit.md'
+        - 'cjson': 'en/modules/cjson.md'
         - 'crypto': 'en/modules/crypto.md'
         - 'gpio': 'en/modules/gpio.md'
         - 'node': 'en/modules/node.md'