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| author | krolyxon <me@krolyxon.com> | 2026-06-08 23:10:46 +0530 |
|---|---|---|
| committer | krolyxon <me@krolyxon.com> | 2026-06-08 23:10:46 +0530 |
| commit | 3120783000d0025b183b0397acaa8b769499eb38 (patch) | |
| tree | 1c4f93be213f1b1d48f59e554562d847b4e7c25e /.pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample | |
Initial gh-pages firmware hosting
Diffstat (limited to '.pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample')
| -rw-r--r-- | .pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample/StringExample.ino | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/.pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample/StringExample.ino b/.pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample/StringExample.ino new file mode 100644 index 0000000..330aea6 --- /dev/null +++ b/.pio/libdeps/esp32-s3-n16r8/ArduinoJson/examples/StringExample/StringExample.ino @@ -0,0 +1,76 @@ +// ArduinoJson - https://arduinojson.org +// Copyright © 2014-2026, Benoit BLANCHON +// MIT License +// +// This example shows the different ways you can use String with ArduinoJson. +// +// Use String objects sparingly, because ArduinoJson duplicates them in the +// JsonDocument. Prefer plain old char[], as they are more efficient in term of +// code size, speed, and memory usage. +// +// https://arduinojson.org/v7/example/string/ + +#include <ArduinoJson.h> + +void setup() { + JsonDocument doc; + + // You can use a String as your JSON input. + // WARNING: the string in the input will be duplicated in the JsonDocument. + String input = + "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}"; + deserializeJson(doc, input); + + // You can use a String as a key to get a member from JsonDocument + // No duplication is done. + long time = doc[String("time")]; + + // You can use a String as a key to set a member of a JsonDocument + // WARNING: the content of the String will be duplicated in the JsonDocument. + doc[String("time")] = time; + + // You can get the content of a JsonVariant as a String + // No duplication is done, at least not in the JsonDocument. + String sensor = doc["sensor"]; + + // Unfortunately, the following doesn't work (issue #118): + // sensor = doc["sensor"]; // <- error "ambiguous overload for 'operator='" + // As a workaround, you need to replace by: + sensor = doc["sensor"].as<String>(); + + // You can set a String as the content of a JsonVariant + // WARNING: the content of the String will be duplicated in the JsonDocument. + doc["sensor"] = sensor; + + // It works with serialized() too: + doc["sensor"] = serialized(sensor); + + // You can also concatenate strings + // WARNING: the content of the String will be duplicated in the JsonDocument. + doc[String("sen") + "sor"] = String("gp") + "s"; + + // You can compare the content of a JsonObject with a String + if (doc["sensor"] == sensor) { + // ... + } + + // Lastly, you can print the resulting JSON to a String + String output; + serializeJson(doc, output); +} + +void loop() { + // not used in this example +} + +// See also +// -------- +// +// https://arduinojson.org/ contains the documentation for all the functions +// used above. It also includes an FAQ that will help you solve any problem. +// +// The book "Mastering ArduinoJson" contains a quick C++ course that explains +// how your microcontroller stores strings in memory. On several occasions, it +// shows how you can avoid String in your program. +// Learn more at https://arduinojson.org/book/ +// Use the coupon code TWENTY for a 20% discount ❤❤❤❤❤ |
