RTDB Stream

[Sylvesta]

Hi,

Need a bit of guidance on the library please. I currently have a few GPIO's that I can toggle via Firebase working no problem.

Code blocks are just snippets, I have built the rest using the examples.

const int output2 = 13;
const int output3 = 14;

void streamCallback(FirebaseStream data){
  Serial.printf("stream path, %s\nevent path, %s\ndata type, %s\nevent type, %s\n\n",
                data.streamPath().c_str(),
                data.dataPath().c_str(),
                data.dataType().c_str(),
                data.eventType().c_str());
  printResult(data); //see addons/RTDBHelper.h
  Serial.println();

  // Get the path that triggered the function
  String streamPath = String(data.dataPath());

  // if the data returned is an integer, there was a change on the GPIO state on the following path /{gpio_number}
  if (data.dataTypeEnum() == fb_esp_rtdb_data_type_integer){
    String gpio = streamPath.substring(1);
    int state = data.intData();
    Serial.print("GPIO: ");
    Serial.println(gpio);
    Serial.print("STATE: ");
    Serial.println(state);
    digitalWrite(gpio.toInt(), state);

if (data.dataTypeEnum() == fb_esp_rtdb_data_type_json){
    FirebaseJson json = data.to<FirebaseJson>();

    // To iterate all values in Json object
    size_t count = json.iteratorBegin();
    Serial.println("\n---------");
    for (size_t i = 0; i < count; i++){
        FirebaseJson::IteratorValue value = json.valueAt(i);
        int gpio = value.key.toInt();
        int state = value.value.toInt();
        Serial.print("STATE: ");
        Serial.println(state);
        Serial.print("GPIO:");
        Serial.println(gpio);
        digitalWrite(gpio, state);
        Serial.printf("Name: %s, Value: %s, Type: %s\n", value.key.c_str(), value.value.c_str(), value.type == FirebaseJson::JSON_OBJECT ? "object" : "array");
    }
    Serial.println();
    json.iteratorEnd();
  }

I would like to know what would be the best way to use boolean and strings to update a variable, this is what I have tried

int btemptest;

if (data.dataTypeEnum() == fb_esp_rtdb_data_type_boolean){
    String input = streamPath.substring(1);
    int state = data.boolData();
    Serial.println(state);
    input = (state);
  }

I see the traffic coming into the ESP32 but it does not update the variable for some reason, any ideas on what I am missing or should rather do?

I can also use an int for the same effect but not sure how to separate the GPIO and other functions I am trying to make.

[mobizt]

This is because the type of data changed at that node is not Boolean.

During test, you should use printResult to print what is actually received.

Firebase-ESP-Client/examples/RTDB/DataChangesListener/Callback/Callback.ino

Line 67 in 60b3d7a

printResult(data); // see addons/RTDBHelper.h