Invalid token in FCM firebase

[razisek]

I want to use Firebase Cloud Messaging (FCM). but when entering Server key from cloud messaging in firebase I get response :

The ID token or registration token was not not found at index
The ID token or registration token was not not found at index
The ID token or registration token was not not found at index

the server key I use is the same as the one in the firebase console this my method :

void sendNotification()
    {
        fbdo.fcm.begin("AAAAJn7rcU0:APA91bECX7dFufaRYc9LzLbSXmIQCFpqmHiJnhg9_h-Mk2W03gaSWPeUmZTxw5235Caqcchm36tyeblsDSFLHyZEfmrA0w9gjTrWtLG6mdprG7tUw8tOUn64ak4W2Emk_Zxxxxxxxxx");
        fbdo.fcm.addDeviceToken("fh3SkcqSTFK7zhmjalPS7f:APA91bGeLJG5gtsNIFU4qsf7uiZchQi9-ZkvQlvJZr_cj6fKr1LGYY8rnoqH7iCRLgg7ZQmKFgCYKM5EmGsiK8c5ovXcLNvCrI9kp3ygoTiYEeOX0TudBkZPw-i83-xxxxxxxxxxxx");
        fbdo.fcm.setPriority("normal");
        fbdo.fcm.setTimeToLive(5000);
        fbdo.fcm.setNotifyMessage("Notification", "Hello World!", "firebase-logo.png", "http://www.google.com");
        fbdo.fcm.setDataMessage("{\"myData\":\"myValue\"}");
        if (Firebase.sendMessage(fbdo, 1))
        {
            //Success, print the result returned from server
            Serial.println(fbdo.fcm.getSendResult());
        }
        else
        {
            //Failed, print the error reason
            Serial.println(fbdo.errorReason());
        }
    }

can anyone help? thanks

[mobizt]

The index in sendMessage started at 0 and you just add only one token using addDeviceToken.

[razisek]

how to send to multiple device?

[mobizt]

Add more tokens and use broadcast.

https://github.com/mobizt/Firebase-ESP32/blob/150be42799b5602a12103db8985b0cdd620b4c69/examples/Messaging/Messaging.ino#L100

[razisek]

thankss sir