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Benoit Blanchon
2014-01-23 12:59:28 +01:00
parent f5a1e1d5e0
commit 53466a2fb2
1 changed files with 5 additions and 13 deletions
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README.md
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@@ -1,6 +1,5 @@
A malloc-free JSON parser for Arduino An efficient JSON parser for Arduino
===================================== ====================================
This library is an thin C++ wrapper around the *jsmn* tokenizer: http://zserge.com/jsmn.html This library is an thin C++ wrapper around the *jsmn* tokenizer: http://zserge.com/jsmn.html
@@ -10,7 +9,7 @@ It has been written with Arduino in mind, but it isn't linked to Arduino librari
Features Features
------- --------
* Based on the well-proven [jsmn](http://zserge.com/jsmn.html) tokenizer * Based on the well-proven [jsmn](http://zserge.com/jsmn.html) tokenizer
* Supports nested objects * Supports nested objects
@@ -43,7 +42,6 @@ Example
How to use ? How to use ?
------------- -------------
@@ -74,7 +72,7 @@ To extract data from the JSON string, you need to create a `JsonParser`, and spe
> Each token takes 8 bytes, so `sizeof(JsonParser<32>)` is 256 bytes which is quite big in an Arduino with only 2KB of RAM. > Each token takes 8 bytes, so `sizeof(JsonParser<32>)` is 256 bytes which is quite big in an Arduino with only 2KB of RAM.
> Don't forget that you also have to store the JSON string in RAM and it's probably big. > Don't forget that you also have to store the JSON string in RAM and it's probably big.
> 32 tokens may seem small but it's very descent for an 8-bit processor, you wouldn't get better results with other JSON libraries. > 32 tokens may seem small, but it's very decent for an 8-bit processor, you wouldn't get better results with other JSON libraries.
### 4. Extract data ### 4. Extract data
@@ -150,7 +148,6 @@ or simply:
double a = root.getArray(0).getDouble(0); double a = root.getArray(0).getDouble(0);
Common pitfalls Common pitfalls
--------------- ---------------
@@ -204,8 +201,6 @@ When you pass a `char*` to `JsonParser::parseArray()` or `JsonParser::parseHashT
This is because we want functions like `JsonArray::getString()` to return a null-terminating string without any memory allocation. This is because we want functions like `JsonArray::getString()` to return a null-terminating string without any memory allocation.
Memory usage Memory usage
------------ ------------
@@ -233,9 +228,6 @@ This table is for an 8-bit Arduino, types would be bigger on a 32-bit processor.
</table> </table>
Code size Code size
--------- ---------
@@ -414,4 +406,4 @@ As you'll see the code size if between 1680 and 3528 bytes, depending on the fea
<td>TOTAL</td> <td>TOTAL</td>
<td>710</td> <td>710</td>
</tr> </tr>
</table> </table>