FCM notification not grouping or replacing the existing notification.

[DipanshuSharma1108]

Whenever I am sending my sensor value in a notification from my ESP-8266 to my android app using .setNotify() function, the existing notification is not getting replaced but new notification is generated in the notification tray. I read that we can replace existing notification using notification tag but I don't know where to write the tag in my Arduino code. Can anyone please help me?

`#if defined(ESP32)
#include <WiFi.h>
#include <FirebaseESP32.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#include <FirebaseESP8266.h>
#endif
const int analogInPin =A0;
int moistureValue = 0;
//Provide the token generation process info.
#include "addons/TokenHelper.h"
//Provide the RTDB payload printing info and other helper functions.
#include "addons/RTDBHelper.h"

/* 1. Define the WiFi credentials */
#define WIFI_SSID ""
#define WIFI_PASSWORD ""

#define API_KEY "API_KEY"

#define DATABASE_URL "tokenapp-ba3e5-default-rtdb.firebaseio.com"
#define FIREBASE_FCM_SERVER_KEY ""
#define FIREBASE_FCM_DEVICE_TOKEN_1 " "
//#define FIREBASE_FCM_DEVICE_TOKEN_2 "ANOTHER_RECIPIENT_DEVICE_TOKEN"
#define USER_EMAIL "USER_EMAIL"
#define USER_PASSWORD "USER_PASSWORD"

FirebaseData fbdo;
//int counterHigh =0, counterLow =0;
void sendLowMessage();
void sendHighMessage();
FirebaseAuth auth;
FirebaseConfig config;

unsigned long sendDataPrevMillis = 0;

void setup()
{

Serial.begin(115200);
Serial.println();
Serial.println();
pinMode(D1,OUTPUT);

WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED)
{
    Serial.print(".");
    delay(300);
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();

Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);

Firebase.begin(DATABASE_URL, "");

Firebase.reconnectWiFi(true);

 fbdo.fcm.begin(FIREBASE_FCM_SERVER_KEY);

fbdo.fcm.addDeviceToken(FIREBASE_FCM_DEVICE_TOKEN_1);

// fbdo.fcm.addDeviceToken(FIREBASE_FCM_DEVICE_TOKEN_2);

fbdo.fcm.setPriority("high");

fbdo.fcm.setTimeToLive(1000);

 if (!Firebase.beginStream(fbdo, "/PUMP_STATUS"))
    Serial.printf("stream begin error, %s\n\n", fbdo.errorReason().c_str());
    fbdo.setBSSLBufferSize(512, 2048);

}
void loop()
{
moistureValue= analogRead(analogInPin);
Serial.println("Moisture Reading = ");
Serial.print(moistureValue);
if (Firebase.ready() && (millis() - sendDataPrevMillis > 5000 || sendDataPrevMillis == 0))
{
sendDataPrevMillis = millis();

    Firebase.setIntAsync(fbdo, "/MOISTURE_READ", moistureValue);
    
    
}
if(moistureValue<300 )
{
  
    sendLowMessage(); 
  
    
 
  }

  if(moistureValue>550 )
  {

   
       sendHighMessage();
             
  }


 if (Firebase.ready())
{

    if (!Firebase.readStream(fbdo))
        Serial.printf("sream read error, %s\n\n", fbdo.errorReason().c_str());

    if (fbdo.streamTimeout())
        Serial.println("stream timeout, resuming...\n");

    if (fbdo.streamAvailable())
    {
      
                      if(fbdo.stringData()== "ON"){
                       digitalWrite(D1,HIGH);
                      }
                      else{
                        digitalWrite(D1,LOW);
                      }
    }
}  

}

void sendHighMessage()
{

fbdo.fcm.setNotifyMessage("Heya User", "The value of moisture in the soil is " + String(moistureValue) + "\n Please Switch ON the water pump");

//fbdo.fcm.setDataMessage("{\"myData\":" + String(moistureValue) + "}");

//Firebase.broadcastMessage(fbdo)
//Firebase.sendTopic(fbdo)
Serial.printf("Send message... %s\n", Firebase.sendMessage(fbdo, 0) ? "ok" : fbdo.errorReason().c_str());

if (fbdo.httpCode() == FIREBASE_ERROR_HTTP_CODE_OK)
    Serial.println(fbdo.fcm.getSendResult());
    
Serial.println();

}

void sendLowMessage()
{

fbdo.fcm.setNotifyMessage("Heya User", "The value of moisture in the soil is " + String(moistureValue) + "\n Please Switch OFF the water pump");

//fbdo.fcm.setDataMessage("{\"myData\":" + String(moistureValue) + "}");

//Firebase.broadcastMessage(fbdo)
//Firebase.sendTopic(fbdo)
Serial.printf("Send message... %s\n", Firebase.sendMessage(fbdo, 0) ? "ok" : fbdo.errorReason().c_str());
   if (fbdo.httpCode() == FIREBASE_ERROR_HTTP_CODE_OK)
    Serial.println(fbdo.fcm.getSendResult());
    
Serial.println();

}`

This is my code. Kindly suggest a solution to this. Thanks in Advance.

[mobizt]

You can use addCustomNotifyMessage e.g fbdo.fcm.addCustomNotifyMessage("tag","yourTag");.

[DipanshuSharma1108]

Thank you very much for your kind response. Your above stated solution only solved half of the problem. Using addCustomNotifyMessage() function I am able to stop displaying individual notifications for every value. Now the existing notification is getting replaced by the new one. But I want the notification to get displayed and make sound only once until the user cancels the notification. Is it possible anyhow? Please let me know. Thanks & Regards

…

On Thu, Jul 22, 2021, 4:51 PM mobizt ***@***.***> wrote: You can use addCustomNotifyMessage <https://github.com/mobizt/Firebase-ESP8266/tree/master/src#add-the-custom-keyvalue-in-the-notify-message-type-information> e.g fbdo.fcm.addCustomNotifyMessage("tag","yourTag");. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#233 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AP7K3X3PYUOV4RX5PURL6L3TY75KBANCNFSM5AZYISKQ> .

[mobizt]

You should read the FCM doc.

This library works with the FCM legacy APIs.

For HTTPv1 API, you can use this Firebase ESP Client library instead.

[DipanshuSharma1108]

Thank You very much for the help and providing us such a good library. You literally saved my day.