FirebaseStream could not detect changes from cloud and Firebase set() and get() got fail result.

[loka17]

I tried the following sketch, it worked fine at the beginning.

#include <FirebaseArduino.h>
#include <ESP8266WiFi.h>

#define FIREBASE_HOST ""
#define NODE_LINK ""
#define FIREBASE_AUTH ""
#define WIFI_SSID ""
#define WIFI_PASSWORD ""

FirebaseArduino FirebaseStream;

void setup() {
  Serial.begin(9600);

  // connect to wifi.
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println();
  Serial.print("connected: ");
  Serial.println(WiFi.localIP());

  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
  FirebaseStream.begin(FIREBASE_HOST, FIREBASE_AUTH);
  FirebaseStream.stream(NODE_LINK);
}

int n = 0;
int m = 0;
void loop() {
  Serial.println("loop");
  Firebase.setInt("/testing/testing2/loopTimes", n++);
  if (Firebase.failed()) {
    Serial.println(Firebase.error());
  }
  int data = Firebase.getInt("/testing/testing2/loopTimes");
  if (Firebase.failed()) {
    Serial.println(Firebase.error());
  }
  Serial.print("data: ");
  Serial.println(data);
  Serial.print("heap: ");
  if (FirebaseStream.failed()) {
    Serial.println("ERROR: streaming error");
    Serial.println(FirebaseStream.error());
  }
  if (FirebaseStream.available()) {
    FirebaseObject event = FirebaseStream.readEvent();
    Serial.print("event: ");
    Serial.println(event.getString("event"));
    Serial.print("path: ");
    Serial.println(event.getString("path"));
    Serial.print("data: ");
    Serial.println(event.getString("data"));

    Firebase.setInt("/testing/testing1/pushTimes", m++);
    if (Firebase.failed()) {
      Serial.println(Firebase.error());
    }
  } else {
    Serial.println("stream is not available");
  }
  Serial.println(ESP.getFreeHeap());
  delay(4000);
}

However after a period of time (in my case, after a night) it did not work as expected. I listed two points that I thinks the issues.

1. I changed data on cloud, but the code did not pass FirebaseStream.available() check.
2. Firebase get and set have always received unsuccessful results due to "connection refused" error. Though I could access to cloud using PC.
   The output in Debug level "HTTP Client + SSL" is as below.

[HTTP-Client][begin] host: < FIREBASE_HOST > port: 443 url: /testing/testing1/loopTimes.json httpsFingerprint: 7A 54 06 9B DC 7A 25 B3 86 8D 66 53 48 2C 0B 96 42 C7 B3 0A
[HTTP-Client] failed connect to < FIREBASE_HOST >:443
[HTTP-Client][returnError] error(-1): connection refused
[HTTP-Client][returnError] error(-4): not connected
PUT /testing/testing1/loopTimes.json: -1
[HTTP-Client][begin] host: < FIREBASE_HOST > port: 443 url: /testing/testing1/loopTimes.json httpsFingerprint: 7A 54 06 9B DC 7A 25 B3 86 8D 66 53 48 2C 0B 96 42 C7 B3 0A
[HTTP-Client] failed connect to < FIREBASE_HOST >:443
[HTTP-Client][returnError] error(-1): connection refused
[HTTP-Client][returnError] error(-4): not connected
GET /testing/testing1/loopTimes.json: -1

I am using

• arduino - esp8266 master master (esp8266/Arduino@43fb139).
• Arduino IDE 1.6.8

Does anyone experience the same issues.
Any help would be appreciated.

[ed7coyne]

Did you try checking the WiFi.status() when you are getting failures? (Similar to what you do in setup())

Maybe you re losing wifi for some reason.

[loka17]

@ed7coyne : thanks for your reply.
After adding wifi checking into loop() (I added checking statement Wifi.status(), in false branch reset the device); Firebase's get and set work correctly now, but FirebaseStream does not.
After a long time of running, FirebaseStream.available() always returns false even after the database was changed. I think if this is a network connection problem then the statement FirebaseStream.failed() should return true, but in my case it returns false.

[ed7coyne]

The stream depends currently on a open TCP connection. Once you lose wifi it will close and not reconnect itself.

It seems a little heavy handed but it may be easiest to just reset the device when you notice the wifi is dropped. That way you will do the same setup() initialization again. Otherwise you can also reopen the stream yourself when you reset the wifi.

However FirebaseStream.failed() should be returning true when the stream fails. That sounds like a bug we will need to address. I opened #177 to track it.

[tabvn]

Same issue at me #185 can not call set during stream

[proppy]

Merging with #48 and #177