forked from bblanchon/ArduinoJson
Added script to compile samples on wandbox.org
This commit is contained in:
71
scripts/wandbox/MsgPackParserExample.cpp
Normal file
71
scripts/wandbox/MsgPackParserExample.cpp
Normal file
@ -0,0 +1,71 @@
|
||||
// ArduinoJson - arduinojson.org
|
||||
// Copyright Benoit Blanchon 2014-2018
|
||||
// MIT License
|
||||
//
|
||||
// This example shows how to generate a JSON document with ArduinoJson.
|
||||
|
||||
#include <iostream>
|
||||
#include "ArduinoJson.h"
|
||||
|
||||
int main() {
|
||||
// Allocate the JSON document
|
||||
//
|
||||
// Inside the brackets, 300 is the size of the memory pool in bytes.
|
||||
// Don't forget to change this value to match your JSON document.
|
||||
// Use arduinojson.org/assistant to compute the capacity.
|
||||
StaticJsonDocument<300> doc;
|
||||
|
||||
// StaticJsonObject allocates memory on the stack, it can be
|
||||
// replaced by DynamicJsonObject which allocates in the heap.
|
||||
//
|
||||
// DynamicJsonObject doc(200);
|
||||
|
||||
// MessagePack input string.
|
||||
//
|
||||
// It's better to use a char[] as shown here.
|
||||
// If you use a const char* or a String, ArduinoJson will
|
||||
// have to make a copy of the input in the JsonBuffer.
|
||||
uint8_t input[] = {131, 166, 115, 101, 110, 115, 111, 114, 163, 103, 112, 115,
|
||||
164, 116, 105, 109, 101, 206, 80, 147, 50, 248, 164, 100,
|
||||
97, 116, 97, 146, 203, 64, 72, 96, 199, 58, 188, 148,
|
||||
112, 203, 64, 2, 106, 146, 230, 33, 49, 169};
|
||||
// This MessagePack document contains:
|
||||
// {
|
||||
// "sensor": "gps",
|
||||
// "time": 1351824120,
|
||||
// "data": [48.75608, 2.302038]
|
||||
// }
|
||||
|
||||
// doc of the object tree.
|
||||
//
|
||||
// It's a reference to the JsonObject, the actual bytes are inside the
|
||||
// JsonBuffer with all the other nodes of the object tree.
|
||||
// Memory is freed when jsonBuffer goes out of scope.
|
||||
DeserializationError error = deserializeMsgPack(doc, input);
|
||||
|
||||
// Test if parsing succeeds.
|
||||
if (error) {
|
||||
std::cerr << "deserializeMsgPack() failed: " << error.c_str() << std::endl;
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Get the root object in the document
|
||||
JsonObject root = doc.as<JsonObject>();
|
||||
|
||||
// Fetch values.
|
||||
//
|
||||
// Most of the time, you can rely on the implicit casts.
|
||||
// In other case, you can do doc["time"].as<long>();
|
||||
const char* sensor = root["sensor"];
|
||||
long time = root["time"];
|
||||
double latitude = root["data"][0];
|
||||
double longitude = root["data"][1];
|
||||
|
||||
// Print values.
|
||||
std::cout << sensor << std::endl;
|
||||
std::cout << time << std::endl;
|
||||
std::cout << latitude << std::endl;
|
||||
std::cout << longitude << std::endl;
|
||||
|
||||
return 0;
|
||||
}
|
Reference in New Issue
Block a user