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While working on my project, I realized that IR remote control wasn’t suitable my project. The IR sensor doesn’t work properly when obstacles block the signal. So, I decided to find another way to control my RC car.
First, I considered modifying the prototype RC car remote control. But, I canceled this decision, because I wasn’t convinced that I was able to make arduino to receive radio waves of prototype remote control.
Second, I considered using a smartphone remote control app with a Bluetooth module to control the RC car. Although the app maker’s UI for Arduino is limited, this isn’t a big problem. Initially, my goal in creating a remote control system was simply to check whether the RC car was working correctly, so I didn’t need detailed control. If I want more advanced control in the future, I can solve it at the Raspberry Pi level.
First, I create the smartphone app UI to use MIT app inventor which is web site that helps you quikly build smartphone apps.
But, there was a problem that UI is not user-friendly because, it’s too close together.
I think it’s because there is a function that arranges automatically. So, I inserted text labels filled with spaces between buttons, and it worked well.
Next, I programed the app using block editor of MIT app inventor. The above parts are used to connect the smartphone app to the Arduino via a Bluetooth module. Here is the Youtube video I refered to when making the above blocks.