FirebaseStream and FirebasePush did not work together

[loka17]

Hi,
I tried to run firebase stream example (FirebaseStream_ESP8266) on device and it worked as I expected.
After that, I tried to add a new feature in which the device push feedback message to firebase cloud after getting data from stream. I used FirebasePush to implement this. (I also tried FirebasePush separately and it worked fine.)
Unfortunately, it ended up with an exception.

Exception (28):
epc1=0x40206efe epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

and FirebasePush error message look like this one.

POST /feedbacks.json: -3

Did I make something incorrectly ?
Any help will be appreciated.

My modified code is as follow.

//
// Copyright 2015 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

// FirebaseStream_ESP8266 is a sample that stream bitcoin price from a
// public Firebase and optionally display them on a OLED i2c screen.

#include <Firebase.h>
#include <ESP8266WiFi.h>
//#include <Adafruit_GFX.h>
//#include <Adafruit_SSD1306.h>
#include <ArduinoJson.h>

//#define OLED_RESET 3
//Adafruit_SSD1306 display(OLED_RESET);

Firebase fbase("<my firebase cloud>");
FirebaseStream stream;

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

  //display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 128x32)
  //display.display();

  // connect to wifi.
  WiFi.begin("SSID", "PASSWORD");
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println();
  Serial.print("connected: ");
  Serial.println(WiFi.localIP());
  stream = fbase.stream("/bitcoin/last");  
}


void loop() {
  if (stream.error()) {
    Serial.println("streaming error");
    Serial.println(stream.error().message());
  }

  if (stream.available()) {
     String event;
     auto type = stream.read(event);
     Serial.print("event: ");
     Serial.println(type);
     if (type == FirebaseStream::Event::PUT) {
       StaticJsonBuffer<200> buf;
       Serial.print("data: ");
       Serial.println(event);
       JsonObject& json = buf.parseObject((char*)event.c_str());
       String path = json["path"];
       float data = json["data"];       

       // TODO(proppy): parse JSON object.
       //display.clearDisplay();
       //display.setTextSize(2);
       //display.setTextColor(WHITE);
       //display.setCursor(0,0);
       //display.println(path.c_str()+1);
       //display.println(data);
       //display.display();

      //Added code: Send feedback to firebase cloud.
      FirebasePush fbPush = fbase.push("/feedbacks", "{\"received\":\"true\"}");
      if (fbPush.error()) {
            Serial.println("Firebase set failed");
            Serial.println(fbPush.error().message());  
            delay(100);
            return;
          }
          Serial.println(fbPush.name());
     }
  }   
}

[proppy]

Which version of the the arduino esp8266 core are you using?

See also #48

[loka17]

Thanks for your reply.
I was using arduino esp8266 version 2.2.0 (installed using board manager) when reported this issue.
Now I am trying install the core from github as be mentioned in #48. (I have never done it before.)
I followed the instruction in "Using git version" (clone repository into hardware/esp8266com/esp8266, download binary tool, restart Arduino).
The issue is still the same (exception still occurred). But I am not sure it run with the new core or the old one, because below /hardware directory there're two versions of esp8266 core.

my Arduino15/packages/esp8266/hardware directory is as below.

hardware
|- esp8266
|- esp8266com

If I installed the core incorrectly, please give me some instructions.
(btw, I am using Arduino IDE version 1.6.8)

[proppy]

You should have two esp8266 board category to select from the 'Tools / Board' menu.

To make sure you're using the right one, edit platform.txt under the both esp8266/esp8266 and esp8266com/esp8266 directory and change the name= property to be:

• name=ESP8266 Modules (stable) for esp8266
• name=ESP8266 Modules (master) for esp8266com

That way you could easily identify them from the 'Board' menu.

Hope that helps.

[loka17]

After changing the name= property in platform.txt files of both version, it turns out that from the "Tools/Board" menu only the stable version is shown.

That means the core which is cloned from github is not recognised by Arduino IDE.

I am pretty sure that I have done all steps described in "Using git version".
Is there any extra config needed ?

Thanks.

[proppy]

what is the content of the esp8266com directory?

[loka17]

The esp8266com directory tree is as below.

esp8266com
   |--esp8266
        |--boards.txt
        |--bootloaders
        |--cores
        |--doc
        |--ISSUE_TEMPLATE.md
        |--libraries
        |--LICENSE
        |--package
        |--platform.txt
        |--programmers.txt
        |--README.md
        |--tests
        |--tools
        |--variants

and tools directory after download binary tools contains these files and sub-directory.

tools
   |--build.py
   |--dist
   |--espota.py
   |--esptool
   |--get.py
   |--mkspiffs
   |--sdk
   |--xtensa-lx106-elf

[proppy]

Can you try to remove the stable directory from hardware temporarily?

[loka17]

Simply removing the stable directory did not work. ESP8266 board definition on Tools/Board has gone away.
However if I change folder's name of master directory from esp8266com/esp8266 into esp8266/2.2.0 (which is the same as stable one), it will be recognised in Tools/Board.

So I think that the directory name is configured somewhere.

Moreover, after removing stable directory and changing master directory's name so that it's recognised by Arduino, I ran the above code. The program still be crashed by Exception (28).

[proppy]

Let's merge the discussion with #48 since I believe this is the same issue.

[proppy]

I think this is fixed with arduino-esp8266 master (esp8266/Arduino@43fb139).

I was able to run successfully the following sketch:

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("/data");
}

int n = 0;
void loop() {
  Serial.println("loop");
  Firebase.setInt("data", n++);
  if (Firebase.failed()) {
    Serial.println(Firebase.error());
  }
  int data = Firebase.getInt("data");
  if (Firebase.failed()) {
    Serial.println(Firebase.error());
  }
  Serial.print("data: ");
  Serial.println(data);
  Serial.print("heap: ");
  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.getInt("data"));
  }
  Serial.println(ESP.getFreeHeap());
  delay(1000);
}

@loka17 can you try again?

[loka17]

I was also able to run successfully the above sketch with arduino-esp8266 master (esp8266/Arduino@43fb139).
I am going to try some more patterns to check if the issue still exists.

[proppy]

@loka17 Thanks! don't hesitate to report your findings here.

[BahmanK]

I'm using the same code and still getting Exception (28):
epc1=0x4020815a epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

Error.

I am positive that FirebaseStream.available break the code. Once I comment out that if, everything works fine.

What else should I do to debug the issue?

Thanks,