Firebase throws exceptions 9 and 28 on ESP8266?

[SirArlo]

Hi the following code keeps throwing exceptions and I do not know why? It connects perfectly to the WiFi and I am able to access my firebase data but every minute or so it crashes with an exception 9.

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

#define WIFI_SSID "SSID"
#define WIFI_PASSWORD "pass"
#define WIFI_LED LED_BUILTIN
#define HEADBOARD_LED D5
#define UNDER_BED_LED D7

#define FIREBASE_HOST "xxxxxxxxx.firebaseio.com"           //link of api
#define FIREBASE_AUTH "xxxxxxxxxxxxxxxxxxxxxxxxxx"           //database secret
#define HEADBOARD_LED_STATUS "/url/more/url"
#define UNDERBED_LED_STATUS "/url/more/url"
#define HEADBOARD_NIGHT_MODE_STATUS "/url/more/url"
#define UNDERBED_NIGHT_MODE_STATUS "/url/more/url"

const long utcOffsetInSeconds = 7200;
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

void connectToWiFi(){

  //set up the wifi connection
  Serial.print("Connecting: ");
  WiFi.disconnect();
  WiFi.setSleepMode(WIFI_NONE_SLEEP);
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID,WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.print(".");
   }
  Serial.println("Ready to rumble!");
  Serial.print("Wifi connected with IP address: ");
  Serial.println(WiFi.localIP());
  digitalWrite(WIFI_LED,LOW);
}

void connectToFireBase(){
   Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);             //connect to Database
}

void setup(){
  Serial.begin(9600);
  Serial.println("Booting");

  //Setup the pinmodes for the various in and outputs
  pinMode(WIFI_LED, OUTPUT);
  pinMode(HEADBOARD_LED, OUTPUT);
  pinMode(UNDER_BED_LED, OUTPUT);

  connectToWiFi();
  timeClient.begin();
  connectToFireBase();
}

void loop(){
  if( WiFi.status() != WL_CONNECTED ){
     connectToWiFi();
     return;
  }
  timeClient.update();
  handleNightModeUnderBed();
  handleNightModeHeadBoard();
}

String firebaseGet(String s){
    String x =Firebase.getString(s);
    yield();
    delay(100);
    return x;
    delay(100);
}

void manageHeadBoardLEDStatus(){
  String LEDStatus = firebaseGet(HEADBOARD_LED_STATUS);
    if (Firebase.failed()) {
      return;
    }
    if (LEDStatus == "ON"){
      digitalWrite(HEADBOARD_LED,HIGH); 
    }else{
      digitalWrite(HEADBOARD_LED,LOW); 
    }
}

void manageUnderBedLEDStatus(){
  String LEDStatus = firebaseGet(UNDERBED_LED_STATUS);
  if (Firebase.failed()) {
      return;
  }
    if (LEDStatus == "ON"){
      digitalWrite(UNDER_BED_LED,HIGH); 
    }else{
      digitalWrite(UNDER_BED_LED,LOW); 
    }

}

void handleNightModeHeadBoard(){
  String NightMode = firebaseGet(HEADBOARD_NIGHT_MODE_STATUS);
    if (Firebase.failed()) {
      return;
  }
    if (NightMode == "ON" && timeClient.getHours() >= 22){
      digitalWrite(HEADBOARD_LED,LOW); 
    }else{
      manageHeadBoardLEDStatus(); 
    }

}

void handleNightModeUnderBed(){
  String NightMode = firebaseGet(UNDERBED_NIGHT_MODE_STATUS);
  if (Firebase.failed()) {
      return;
  }
    if (NightMode == "ON" && timeClient.getHours() >= 22){
      digitalWrite(UNDER_BED_LED,LOW); 
    }else{
      manageUnderBedLEDStatus(); 
    }
}

Exception (9):
epc1=0x40206b4a epc2=0x00000000 epc3=0x00000000 excvaddr=0x65646f4d depc=0x00000000

>>>stack>>>

PC: 0x4020b4a4: HTTPClient::connected() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 472
EXCVADDR: 0x00000038

Decoding stack results
0x4020591c: HTTPClient::disconnect(bool) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 435
0x402067f4: HTTPClient::end() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 425
0x40206c20: HTTPClient::begin(String, unsigned short, String, String) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 379
0x40201f38: std::string::_Rep::_M_destroy(std::allocator  const&) at c:\users\arlo\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2\bits/basic_string.tcc line 452
0x402075b8: String::copy(char const*, unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 214
0x402037c3: FirebaseHttpClientEsp8266::begin(std::string const&, std::string const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseHttpClient_Esp8266.cpp line 51
0x4020157c: FirebaseRequest::sendRequest(std::string const&, std::string const&, char*, std::string const&, std::string const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\Firebase.cpp line 73
0x40201efc: std::basic_string  , std::allocator  >::basic_string(char const*, std::allocator  const&) at c:\users\arlo\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2\bits/basic_string.tcc line 218
0x402027ed: FirebaseArduino::getRequest(String const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseArduino.cpp line 101
0x40201d45: FirebaseObject::~FirebaseObject() at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src/FirebaseObject.h line 37
0x4020282e: FirebaseArduino::getString(String const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseArduino.cpp line 132
0x4020756f: String::reserve(unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 146
0x40208393: esp_yield() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 107
0x402089ae: __delay(unsigned long) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_wiring.cpp line 57
0x402075b8: String::copy(char const*, unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 214
0x40201157: firebaseGet(String) at D:\Jarvis\Bed_Control/Bed_Control.ino line 99
0x4020118b: manageHeadBoardLEDStatus() at D:\Jarvis\Bed_Control/Bed_Control.ino line 106
0x402047c8: ESP8266WiFiSTAClass::status() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266WiFi\src\ESP8266WiFiSTA.cpp line 634
0x4010017c: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 159
0x40201227: loop() at D:\Jarvis\Bed_Control/Bed_Control.ino line 94
0x402084c0: loop_wrapper() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 179```

Exception (28): epc1=0x4020b7ac epc2=0x00000000 epc3=0x00000000 excvaddr=0x00004684 depc=0x00000000

stack>>>

PC: 0x4020b4a4: HTTPClient::connected() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 472 EXCVADDR: 0x00000038

Decoding stack results 0x4020591c: HTTPClient::disconnect(bool) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 435 0x402067f4: HTTPClient::end() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 425 0x40206c20: HTTPClient::begin(String, unsigned short, String, String) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 379 0x40201f38: std::string::_Rep::_M_destroy(std::allocator const&) at c:\users\arlo\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2\bits/basic_string.tcc line 452 0x402075b8: String::copy(char const, unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 214 0x402037c3: FirebaseHttpClientEsp8266::begin(std::string const&, std::string const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseHttpClient_Esp8266.cpp line 51 0x4020157c: FirebaseRequest::sendRequest(std::string const&, std::string const&, char, std::string const&, std::string const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\Firebase.cpp line 73 0x40201efc: std::basic_string , std::allocator >::basic_string(char const, std::allocator const&) at c:\users\arlo\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2\bits/basic_string.tcc line 218 0x402027ed: FirebaseArduino::getRequest(String const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseArduino.cpp line 101 0x40201d45: FirebaseObject::~FirebaseObject() at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src/FirebaseObject.h line 37 0x4020282e: FirebaseArduino::getString(String const&) at C:\Users\Arlo\Documents\Arduino\libraries\firebase-arduino-master\src\FirebaseArduino.cpp line 132 0x4020756f: String::reserve(unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 146 0x40208393: esp_yield() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 107 0x402089ae: __delay(unsigned long) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_wiring.cpp line 57 0x402075b8: String::copy(char const, unsigned int) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\WString.cpp line 214 0x40201157: firebaseGet(String) at D:\Jarvis\Bed_Control/Bed_Control.ino line 99 0x4020118b: manageHeadBoardLEDStatus() at D:\Jarvis\Bed_Control/Bed_Control.ino line 106 0x402047c8: ESP8266WiFiSTAClass::status() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\libraries\ESP8266WiFi\src\ESP8266WiFiSTA.cpp line 634 0x4010017c: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 159 0x40201227: loop() at D:\Jarvis\Bed_Control/Bed_Control.ino line 94 0x402084c0: loop_wrapper() at C:\Users\Arlo\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.1\cores\esp8266\core_esp8266_main.cpp line 179```

It keeps happening and it is only when I use the arduino Firebase library. If I don't touch firebase the code works just fine.

[proyectosAndroid12]

Did you fix it? I have the same problem

[99bit]

@proyectosAndroid12 i Found that if you're using old Node Mcu You Should have to downgrade the Esp Board Driver , i tried to downgrade to 2.3.0 and it worked perfectly fine no more exception

I thought that it is because of old driver in old Mcu

[fabianrosales]

Thank you very much!...since my code has several libraries, I was going around trough so many topics trying to figure out what was the problem....you should listen all theories about to solve this problem....delays, power supply, capacitors, etc, etc, etc.

[ivansheva]

@proyectosAndroid12 i Found that if you're using old Node Mcu You Should have to downgrade the Esp Board Driver , i tried to downgrade to 2.3.0 and it worked perfectly fine no more exception

I thought that it is because of old driver in old Mcu

Thank you very much !, i try to downgrade ESP Board Driver from 2.6.1 to 2.3.0 worked for me, no error exception 9 again, nice !

[NguyenVTruong]

Thanks you very much!

[gnanasreekar]

❤❤❤❤❤❤❤❤❤❤❤❤

[jashvithlani]

@proyectosAndroid12 i Found that if you're using old Node Mcu You Should have to downgrade the Esp Board Driver , i tried to downgrade to 2.3.0 and it worked perfectly fine no more exception

I thought that it is because of old driver in old Mcu

you are greatttt man thank you so much i was fucked up since 3 hours trying to solve this. Thank you sooooooooooo much

[junaidiqbal10]

I tried to downgrade my board to 2.3 but code is not uploading. Error compling for board nodemcu

[RukshanJS]

I tried to downgrade my board to 2.3 but code is not uploading. Error compling for board nodemcu

I also got the same issue after downgrading to 2.3, but I got it working after selecting the board NodeMCU 0.9 (instead of NodeMCU 1.0) in the Arduino IDE.

[Ashishdatley]

Thank you so much for help for this exception lol i was going to buy new nodemcu but you guys save me lol hehe

[thilina15]

@proyectosAndroid12 i Found that if you're using old Node Mcu You Should have to downgrade the Esp Board Driver , i tried to downgrade to 2.3.0 and it worked perfectly fine no more exception

I thought that it is because of old driver in old Mcu

OMFG thanks dude. it worked for me.. thank you very much

[Nadir98s]

https://arduinojson.org/v6/error/jsonbuffer-is-a-class-from-arduinojson-5/ Downgrade arduinoJson library to 5.13.5

[pratheeshskammath]

Thank you so much, I got the same problem after downgrading code works without any problem.

[Sakib6813]

I tried to downgrade my board to 2.3 but code is not uploading. Error compling for board nodemcu

I also got the same issue after downgrading to 2.3, but I got it working after selecting the board NodeMCU 0.9 (instead of NodeMCU 1.0) in the Arduino IDE.

I selected that but I still have the same problem of error compiling

[attaqi]

same here did not work

[Ramzi-dr]

me to

[pratheeshskammath]

Use mobizt firebase library, it works on updated nodemcu boards I'm using 2.7.4 version of esp8266 : https://github.com/mobizt/Firebase-ESP8266