ERROR:GCM didn't return a 200 or 503 status (0):

As you can see in the FAQ:

Your server is unable to connect to the GCM (Google Cloud Messaging).
This can be caused by:

• The fact that cURL is not installed on your server.
• The fact that Push Notifications for WordPress can’t reach the URL https://android.googleapis.com/gcm/send.

You can do a simple test by launching this command on your server:

curl --header "Authorization: key=xxx" --header Content-Type:"application/json" https://android.googleapis.com/gcm/send -d "{\"registration_ids\":[\"ABC\"]}"

Please change xxx with your Google API Key.

I tried the above curl command from my Windows 10 machine (command prompt) running local IIS server and it works. and checked php.info() has CURL enabled.
so what now?

Thanks!!

At the moment IIS is not supported by our plugin.
We suggest you to use Apache or NGiNX instead, as they are well supported.

Hello! We’ll assume that the problem is resolved and close this thread. Kind regards!

I used your plugin to register a device.
and created my own php script to send notification using device IDs which your plugin saved in my db.

Do you have some log that we can use to investigate the problem?

no,
I think the problem is because of my server, its IIS and you don’t support that.
if I’d have a Apache then I wouldn’t have to go this much trouble.
but eventually, My purpose is fulfilled.
So, thanks for support and also for creating this plugin.

Hi,

I am using your plugin and getting same error as mentioned above. I even tried the curl command specified by you in your first reply and it is working fine .I am using Apache but still while sending test notification it throws FCM didn’t return a 200 or 503 status error. Can you please help me with this ?

Thanks.

Hello, GCM has been deprecated, you must follow this guide to correctly configure the FCM project.

Hello there, we have configured the project as per the documentation. We are able to send the notification from command line using curl. The issue is while sending the test notifications from wordpress. Is there anything we need to take care of while registering users or anything else. Let me know if you need any more details. Thanks.