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2026-08-18 13:34:21 +08:00
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@ -1,37 +1,52 @@
// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2025, Benoit BLANCHON
// Copyright © 2014-2026, Benoit BLANCHON
// MIT License
//
// This example shows how to deserialize a JSON document with ArduinoJson.
//
// https://arduinojson.org/v7/example/parser/
// https://arduinojson.org/v6/example/parser/
#include <ArduinoJson.h>
void setup() {
// Initialize serial port
Serial.begin(9600);
while (!Serial)
continue;
while (!Serial) continue;
// Allocate the JSON document
JsonDocument doc;
//
// Inside the brackets, 200 is the capacity of the memory pool in bytes.
// Don't forget to change this value to match your JSON document.
// Use https://arduinojson.org/v6/assistant to compute the capacity.
StaticJsonDocument<200> doc;
// StaticJsonDocument<N> allocates memory on the stack, it can be
// replaced by DynamicJsonDocument which allocates in the heap.
//
// DynamicJsonDocument doc(200);
// JSON input string.
const char* json =
//
// Using a char[], as shown here, enables the "zero-copy" mode. This mode uses
// the minimal amount of memory because the JsonDocument stores pointers to
// the input buffer.
// If you use another type of input, ArduinoJson must copy the strings from
// the input to the JsonDocument, so you need to increase the capacity of the
// JsonDocument.
char json[] =
"{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
// Deserialize the JSON document
DeserializationError error = deserializeJson(doc, json);
// Test if parsing succeeds
// Test if parsing succeeds.
if (error) {
Serial.print(F("deserializeJson() failed: "));
Serial.println(error.f_str());
return;
}
// Fetch the values
// Fetch values.
//
// Most of the time, you can rely on the implicit casts.
// In other case, you can do doc["time"].as<long>();
@ -40,7 +55,7 @@ void setup() {
double latitude = doc["data"][0];
double longitude = doc["data"][1];
// Print the values
// Print values.
Serial.println(sensor);
Serial.println(time);
Serial.println(latitude, 6);