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HCTRA — Harris County Toll Road Authority is the official website of the agency that operates and maintains the toll roads in Harris County, Texas. You can find out how to use, pay, and manage your toll account online, as well as access interactive maps, traffic cameras, and the EZ Tag Express app. Visit hctra to learn more and enjoy a smooth …
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Now, swipe down from the top of your Android phone's screen and make sure Bluetooth is turned on. 3. Touch and hold the Bluetooth icon, then tap "Pair new device" and wait a few seconds. 4. Tap the name of the Bluetooth device you want to pair with your device (in our case, HC-05). Follow any on-screen instructions.
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The HC-SR04 ultrasonic sensor uses sonar to determine the distance to an object. This sensor reads from 2cm to 400cm (0.8inch to 157inch) with an accuracy of 0.3cm (0.1inches), which is good for most hobbyist projects. In addition, this particular module comes with ultrasonic transmitter and receiver modules.
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