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HC-SR04 VS. SDM-IO Ultrasonic Ranging Module

There are two products in imall.iteadstudio.com for ultrasonic ranging. One is the common 4pin HC-SR04, and the other is 3pin SDM-IO. The ultrasonic ranging product can be installed in the previous joystick wireless control car kit so that the car will have the function of barrier detecting. Before installing, we make a comparison for these two products to see which is better for installing in car kit.



1. Upload HC-SR04 demo to Iteaduino UNO, and SDM-IO demo to Iteaduino Nano respectively.

2. Connect the products according to the following two pictures:

After connecting, power mainboards, and then we start to test their ultrasonic ranging sensitivity by covering upon them a cardboard, a chopstick or a dupunt line.

Our test has been recorded in a video, you can see clearly that SDM-IO is more sensitive than HC-SR04. Of cause, the price of SDM-IO is higher than HC-SR04 as well.