Tasmota/lib/ArduinoJson/examples/ProgmemExample/ProgmemExample.ino

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// Copyright Benoit Blanchon 2014-2017
// MIT License
//
// Arduino JSON library
// https://github.com/bblanchon/ArduinoJson
// If you like this project, please add a star!
#include <ArduinoJson.h>
// About
// -----
// This example shows the different ways you can use PROGMEM with ArduinoJson.
// Please don't see this as an invitation to use PROGMEM.
// On the contrary, you should always use char[] when possible, it's much more
// efficient in term of code size, speed and memory usage.
void setup() {
#ifdef PROGMEM
DynamicJsonBuffer jsonBuffer;
// You can use a Flash String as your JSON input.
// WARNING: the content of the Flash String will be duplicated in the
// JsonBuffer.
JsonObject& root =
jsonBuffer.parseObject(F("{\"sensor\":\"gps\",\"time\":1351824120,"
"\"data\":[48.756080,2.302038]}"));
// You can use a Flash String to get an element of a JsonObject
// No duplication is done.
long time = root[F("time")];
// You can use a Flash String to set an element of a JsonObject
// WARNING: the content of the Flash String will be duplicated in the
// JsonBuffer.
root[F("time")] = time;
// You can set a Flash String to a JsonObject or JsonArray:
// WARNING: the content of the Flash String will be duplicated in the
// JsonBuffer.
root["sensor"] = F("gps");
// You can compare the content of a JsonVariant to a Flash String
if (root["sensor"] == F("gps")) {
// ...
}
#else
#warning PROGMEM is not supported on this platform
#endif
}
void loop() {
// not used in this example
}