Ultrasonic distance sensor

Connect the ultrasonic sensor to the Orange Pi

In this tutorial we will learn how to connect a HC-SR04 ultrasonic range sensor to the Orange Pi. This sensor measures distance from the sensor to an object by using ultrasounds. This is similar to how animal echolocation works, for example bats navigating in total darkness. Also, it’s how the submarine’s sonar detects objects under the sea.

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Touchscreen display on Raspberry Pi

Attach the display directly to the GPIO pins

So I just got a 5 inch 800×480 HDMI touchscreen display. It comes with a CD with the drivers, a small HDMI connector, a touch pen, and it has a nice back light control switch.

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Install MySQL on the Orange Pi

Install MySQL and set up a database

In this post I will show you how to install MySQL sever on the Raspberry Pi or on an Orange Pi Plus 2e. Furthermore I will show you how to read and write data from Python to a MySQL database using SQLAlchemy.

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