HELP: firebase.pushJSON with JSONObject created by ArduinoJSON

[sarkrui]

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name: Help and how to firebase.pushJSON with non-hardcoded JSON data?

---

const int BUFFER_SIZE = JSON_OBJECT_SIZE(3); StaticJsonBuffer<BUFFER_SIZE> jsonBuffer; JsonObject& logData = jsonBuffer.createObject(); logData["dBValue"] = 45.0; logData["time"] = "2019-05-15T15:00:25"; logData["buttonState"] = 0; Firebase.pushJSON(firebaseData, data_log + device_id, logData);

With the above codes, I had such an error.

no matching function for call to 'FirebaseESP32::pushJSON(FirebaseData&, StringSumHelper&, ArduinoJson::JsonObject&)'

I have tried using ArduinoJSON v5/v6, but JSONObject isn't supported by firebase.pushJSON. I wonder how other dudes include variables in the jsonData. From the example, the data is hardcoded though. String jsonData = "{\"parent_001\":\"parent 001 text\", \"parent 002\":{\"child_of_002\":123.456}}";

[mobizt]

You need to print (v5) or serialize (v6) ArduinoJson object (classs) as Arduino string object or C or C++ string. And pass that string to Firebase function.

[sarkrui]

Thanks @mobizt ! It works!

Using ArduinoJson V6

  //generated by arduinojson.org/v6/assistant/
  const size_t capacity = JSON_OBJECT_SIZE(3);
  DynamicJsonDocument objectData(capacity);

  objectData["dBValue"] = 45.0;
  objectData["time"] = "2019-05-15T15:00:25";
  objectData["buttonState"] = 0;

  String logData;
  serializeJson(objectData, logData);
  Firebase.pushJSON(firebaseData, data_log + device_id, logData);

[sarkrui]

I did manage to pass int float variables into a JSONObject, however, only ints and floats were synchronized, why is that?

  //generated by arduinojson.org/v6/assistant/
  const size_t capacity = JSON_OBJECT_SIZE(3);
  DynamicJsonDocument objectData(capacity);

  objectData["dBValue"] = dBValue;  //global variable, float 
  objectData["buttonState"] = buttonState; //global variable, int
  objectData["time"] = formattedDate; //global variable String

  String logData;
  serializeJson(objectData, logData);
  Firebase.pushJSON(firebaseData, data_log + device_id, logData);

Firebase Output:

[mobizt]

What do you mean synchronized?

[mobizt]

Print or serialize your created ArduinoJson object to string and check it on serial print, if something wrong with ArduinoJson please open issue at ArduinoJson Github.

[sarkrui]

Thanks @mobizt ! I switched to ArduinoJSONV5 and problem solved. not synchronized, I meant only int and float were passed, whereas String wasn't.

void baselinePushV5() {

  const size_t capacity = JSON_OBJECT_SIZE(3);
  DynamicJsonBuffer jsonBuffer(capacity);

  JsonObject& root = jsonBuffer.createObject();
  root["dBValue"] = 56;
  root["buttonState"] = 2;
  root["timeStamp"] = formattedDate;
  root.printTo(serialjson);
  Serial.println(serialjson);
  delay(1000);
}

Serial Outputs

{"dBValue":56,"buttonState":2,"timeStamp":"2019-05-21T12:10:53"}

Failed to pass String (variable) to JSONObject https://github.com/bblanchon/ArduinoJson/issues/1002

[Proxcentaur]

Thanks @mobizt ! I switched to ArduinoJSONV5 and problem solved. not synchronized, I meant only int and float were passed, whereas String wasn't.

void baselinePushV5() {

  const size_t capacity = JSON_OBJECT_SIZE(3);
  DynamicJsonBuffer jsonBuffer(capacity);

  JsonObject& root = jsonBuffer.createObject();
  root["dBValue"] = 56;
  root["buttonState"] = 2;
  root["timeStamp"] = formattedDate;
  root.printTo(serialjson);
  Serial.println(serialjson);
  delay(1000);
}

Serial Outputs

{"dBValue":56,"buttonState":2,"timeStamp":"2019-05-21T12:10:53"}

Failed to pass String (variable) to JSONObject bblanchon/ArduinoJson#1002

How did you pass the root data into Firebase.pushJSON? I did the same thing but still can't pass those data.

[mobizt]

You can't use ArduinoJson with this library to handle JSON.

The library has built-in JSON parser and builder called FirebaseJson and you should use it instead.

See the example for the usages.

[sarkrui]

@Proxcentaur Check this out, usage of FirebaseJSON.

[mobizt]

@Proxcentaur Did you read this?

[Proxcentaur]

Thank you so much, I have read this.

Best regards, Septia Dini R Instrumentation Technology Department of Electrical and Informatics Engineering Universitas Gadjah Mada

Pada tanggal Kam, 14 Mei 2020 pukul 00.37 mobizt notifications@github.com menulis:

@Proxcentaur https://github.com/Proxcentaur Did you read this https://github.com/mobizt/Firebase-ESP8266/issues/2#issuecomment-628094708 ?

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