Ultrasonic Sensor Raspberry Pi

The hc sr04 ultrasonic sensor we ll be using in this tutorial for the raspberry pi has four pins.

Ultrasonic sensor raspberry pi.

Including showing how to wire up the sensor to the raspberry pi we also explore writing a python script that will utilize the hc sr04 ultrasonic sensor to calculate distance. I have been asked to prepare a code that works on python to control 8 ultrasonic sensors connected to a raspberry pi board. This is because the output of the hc sr04 ultrasonic sensor is at a 5v logic level whereas the raspberry pi works on a 3 3v logic level. The raspberry pi can also be used as a micro controller but it has a lot more functions because it runs an operating system.

Using a raspberry pi distance sensor ultrasonic sensor hc sr04 for many outdoor projects a distance measurement is necessary or advantageous. These small modules are available starting at 1 2 bucks and can measure the distance up to 4 5 meters by ultrasound and are suprisingly accurate. It can for example also read analog sensors. We power the module using vcc ground it using gnd and use our raspberry pi to send an input signal to trig which triggers the sensor to send an ultrasonic.

The arduino can also be operated very easily on and with the raspberry pi e g. The system shall be connected to a screen via an hdmi and it should show something like a radar monitor. The sensor i choose for such a project is the hc sr04 sensor. Via usb or 433 mhz or 2 4 ghz radio.

The raspberry pi can be connected to the number of analog and digital sensors to measure the readings of the various quantities that the particular sensor is designed to provide. The list of some of the common sensors that can be connected to the raspberry pi is given below. We use ultrasonic waves because they are relatively accurate across short distances and don t cause disturbances as they are inaudible to human ear. We achieve this by measuring the time it takes the ultrasonic pulse being sent out to it being received back by the sensor.

A true micro controller is e g.