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Protobuf Integration into Flutter Projects Casey Matson-deKay

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Agenda 1 2 3 4 5 What is Protobuf? Why is it useful? Using Protobuf in an example Flutter project. How we use Protobuf at Common Events. Come get involved! Questions

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Tool for defining structured data types… 1 …when datatypes are shared between multiple programming environments… What is Protobuf? When to use it? 2 …and you have control over those different environments. 3

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An Example - Dam Inspections with Drones

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An Example - Dam Inspections with Drones

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory ● Web Application ● Written in HTML / JS ● Shows less info than the pilot sees

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory ● Web Application ● Written in HTML / JS ● Shows less info than the pilot sees ● Shared, structured data format ● Shared, structured data format ● Shared, structured data format

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● Windows / Linux Application ● Written in .Net, C++, maybe Flutter ● Running on a laptop ● Shows lots of technical info, commands, etc ● Written in C ● Running on a microcontroller ● Only a few MB of memory ● Web Application ● Written in HTML / JS ● Shows less info than the pilot sees ● Shared, structured data format ● Shared, structured data format ● Shared, structured data format ● Telemetry ● Measurement Instrument Status ● Battery level ● Error / diagnostic info ● Etc

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Common UI Definition

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Common Data Definition

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Let’s do an example

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Defining a common data structure. + Compiling .proto file to Dart & Python. Transmitting serialized data between Python and Dart. What have we seen? + + Generation of native objects in both languages. +

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There’s only 1 programming environment, and probably always will be. + You don’t have full control over each programming environment. Data definitions don’t change very often. You enjoy dealing with type errors / missing field errors in production… When you should NOT use Protobuf + + +

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How we use this at Common Events

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Come get Involved!

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We can offer you a competitive salary of….

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$0

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Last thing… v

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Last thing… v

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Thank you! Questions? v Company LinkedIn My Linkedin Celebrate May 22nd