Adafruit Feather M0 and US-025 ultrasonic sensor circuitpython example

In this example we connect a US-025 ultrasonic sensor to an Adafruit Feather M0 running Circuitpython

US-025 is an upgraded version of the HC-SR04, with a kind of high performance, low cost ultrasonic module. The module uses the CS100 , a high performance-cost ratio ultrasonic ranging chip.

First lets look at some information about the sensor from the manufacturer

Description

Parts Required

Name	Link
Adafruit Feather M0 Express	Adafruit (PID 3403) Feather M0 Express – Designed for CircuitPython – ATSAMD21 Cortex M0
US-025  ultrasonic sensor	1pcs US-025 US-026 ultrasonic ranging sensor module
Connecting cables	Free shipping Dupont line 120pcs 20cm male to male + male to female and female to female jumper wire

Schematic/Connection

The Ultrasonic sensor has four terminals – +5V, Trigger, Echo, and GND connected as follows

• Connect the +5V pin to +3.3v on your Adafruit Feather board.
• Connect Trigger to digital pin 5 on your Adafruit Feather board.
• Connect Echo to digital pin 6 on your Adafruit Feather board.
• Connect GND with GND on Adafruit Feather.

feather and us-026

Code Example

I used Mu for development, you can use the HCSR04 library

The following is based on a library , I copied the adafruit_hcsr04.mpy to the lib folder on my Feather M0 Express – https://circuitpython.org/libraries

[codesyntax lang=”python”]

import time
import board
import adafruit_hcsr04

sonar = adafruit_hcsr04.HCSR04(trigger_pin=board.D5, echo_pin=board.D6)

while True:
    try:
        print((sonar.distance,))
    except RuntimeError:
        print("Retrying!")
    time.sleep(0.1)

[/codesyntax]

Output

Here is what I saw in Mu REPL window

(5.066,)
(5.185,)
(4.658,)
(3.281,)
(3.349,)
(5.083,)
(3.774,)
(3.332,)

Links