ProCodeCG codeMeetUp() #90 – BR – IoT and MQTT

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The topic for today is how to connect IoT to cloud, by Prof. Budi Rahardjo πŸ™‚

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The preparation before presentation and demo. Making sure internet connection was stable πŸ™‚

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What is MQTT?

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Concept of Queue

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The audience (a few more were coming late)

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Example of queue system is RabbitMQ

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The stuff for demo

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Pak BR used DyCodeX Espectro because it already has wifi module on board πŸ™‚

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MQTT communication model

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Brokers. The open source one is Mosquitto

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Starting up Mosquitto

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subscribing to HiveMQ

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The client

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The code

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It worked just fine, with DyCodeX Espectro πŸ˜‰

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Compiling code with PlatformIO

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The topic can be subscribed from an Android phone with MQTT apps. Look on the right, when the publisher send a message to turn on/off the LED, Espectro LED on board will be on/off and the switch on Android will be checked/unchecked.

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The code can be in Python too πŸ™‚ With paho library

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The code can be compiled with Arduino IDE too

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We learned so much thing today πŸ™‚

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After class, we tried to set up a publisher and subscriber on Android phones

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Yea it worked πŸ™‚

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The phone on the left is publisher and the right one is subscriber. Notice that the right oneΒ display anything inputted by the left one πŸ™‚

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With this platform we can create so much things! Will be reporting more updates very soon πŸ™‚

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