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MQTT%20(Message%20Queue%20Telemetry%20Transport)%20is%20a%20lightweight%20messaging%20protocol%20specially%20designed%20for%20IOT%20by%20IBM.%20MQTT%20works%20on%20Publish-Subscribe%20Model.%0A%0AFacebook%20%26%20WhatsApp%20uses%20MQTT%20for%20their%20messaging%20engine.%0A%0AWell%2C%20In%20the%20tutorial%20I%20am%20going%20to%20show%20how%20you%20can%20implement%20a%20push%20notification%20service%20using%20MQTT.%20I%20am%20not%20going%20to%20implement%20complete%20service%20but%20a%20prototype%20on%20how%20it%20can%20be.%0A%0ATools%20will%20used%2C%0A%0A1.%20EMQ%20(MQTT%20Broker)%0A2.%20MongoDB%20(To%20store%20user's%20information)%0A3.%20Admin%20Dashboard%20(To%20publish%20notification)%0A4.%20Android%20App%20(Client)%0A5.%20Eclipse%20Paho%20MQTT%20client%20(Android%2C%20JavaScript)%0A%0A!%5B%5D(http%3A%2F%2Fblog.sakib.ninja%2Fcontent%2Fimages%2F2017%2F05%2FUntitled-Diagram.png)%0A%0AIts%20the%20big%20picture%2C%20how%20components%20in%20the%20system%20are%20interacting%20with%20each%20other.%0A%0A%3E%20The%20idea%20is%20user%20will%20connect%20to%20mqtt%20broker%2C%20broker%20will%20authenticate%20them%20with%20data%20in%20mongodb.%0A%3E%0A%3E%20Assume%20a%20user%20as%20system%20admin%20who%20will%20publish%20notifications%20%26%20other%20users%20will%20be%20subscribed%20to%20receive%20these%20notifications.%20Suppose%2C%20**%5Ba%40email.com%5D(mailto%3Aa%40email.com)**%20is%20a%20user%2C%20after%20authentication%20with%20the%20email%20address%20the%20user%20will%20be%20subscribed%20to%20the%20topic(%20**%5Ba%40email.com%5D(mailto%3Aa%40email.com)**)%20and%20then%20from%20admin%20dashboard%20if%20you%20publish%20a%20message%20on%20topic%20**%5Ba%40email.com%5D(mailto%3Aa%40email.com)**%20the%20user%20will%20receive%20it.%20Thats%20all.%0A%0AMongoDB%20Document%20Schema%2C%0A%0A%60%60%60%0A%7B%0A%20%20%20%20%22user_email%22%3A%20%22email%20address%20of%20user%22%2C%0A%20%20%20%20%22user_password%22%3A%20%22password%20of%20user%22%2C%0A%20%20%20%20%22type%22%3A%20%22admin%2Fuser%22%0A%7D%0A%0A%60%60%60%0A%0AAssume%20this%20is%20the%20admin%20dashboard%2C%0A%0A!%5B%5D(http%3A%2F%2Fblog.sakib.ninja%2Fcontent%2Fimages%2F2017%2F06%2FUntitled-Diagram.png)%0A%0AThere%20are%203%20buttons.%20One%20to%20**Logout**%2C%20One%20is%20to%20**Add%20User**%20and%20another%20to%20**Send%20Push**%20notifications.%0A%0AIn%20screen%20the%20push%20notification%20view%20is%20visible.%20Admin%20dashboard%20is%20connected%20to%20MQTT%20broker%20via%20Websocket.%20User%20Email%20Address%20is%20the%20topic%20where%20message%20is%20going%20to%20be%20published.%20When%20clicked%20on%20Send%20it%20will%20publish%20the%20message%20using%20Websocket.%0A%0ANow%20if%20the%20respective%20email%20address%20is%20connected%20%26%20subscribed%20to%20respective%20topic%20then%20the%20client%20will%20receive%20the%20message.%0A%0A**Note**%20%3A%20This%20is%20just%20a%20prototype%20for%20educational%20purpose%20not%20production%20ready.%20To%20use%20it%20in%20production%20system%20you%20have%20to%20implement%20security%20%26%20other%20tuning%20where%20needed.

Building custom push notification service with MQTT

Bangladesh

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