SR04

James12345

Would anyone happen to know how to connect a HC-SR04 using just 3 wires (meaning; using echo and trigger through 1 gpio)? I've googled this and searched all over and there are solutions for Arduinos (assume they allow 5v back to pin, where as a raspberry ...

tjrob

... program implements a 200 MHz frequency counter in a CPLD, sampled at 1 kHz; I will be doing an ADS1256 4-channel ADC sampled at 1 kHz, and also an SR04 ultrasonic ranger at 20 Hz (with accuracy of 2 mm RMS -- much better than most because it times the echo using the SPI clock).

pcmanbob

Hi. The HC-SR04 is an ultrasonic range finder and is a normally a 5v device but just check yours is 5v. So you need to connect it like this https://i.imgur.com/4mDmSQ0.jpg you need the potential divider on the echo circuit to reduce ...

totoharibo

soudure ou wrapping.

andalus

Hello guys, My first time trying HC-SR04. I used the tutorial here for gpiozero: https://projects.raspberrypi.org/en/projects/physical-computing/14 I ended up with the following message: /usr/lib/python3/dist-packages/gpiozero/input_devices.py:779: ...

pcmanbob

Yes you can. If you do use a battery make sure you also connect the battery ground (-ve) to a Pi ground. However, why not just connect more wires to one or more of the Pi's 5V pins? my 2 pins are already taken for a L298N, so i'm afraid that it's too much for my rpi, do you think that it will be ok...

joan

Yes, using an external power supply to power sensors is fine (again with the proviso you need to connect the external power supply and Pi grounds).

teazy

Yes you can. If you do use a battery make sure you also connect the battery ground (-ve) to a Pi ground. However, why not just connect more wires to one or more of the Pi's 5V pins? my 2 pins are already taken for a L298N, so i'm afraid that it's too much for my rpi, do you think that it will be ok...

joan

Yes you can. If you do use a battery make sure you also connect the battery ground (-ve) to a Pi ground.

However, why not just connect more wires to one or more of the Pi's 5V pins?

teazy

Salut tout le monde, j'ai besoin d'utiliser 4 capteurs ultrasons pour mon projet mais j'ai plus de place sur les 2 pins 5V de mon rpi, comment je peux faire pour les alimenter ? Il est possible d'utiliser une batterie externe de 5V ?

Merci à vous

teazy

Hi guys, i need to use many ultrasonic sensors (4) and my 2 5V pins on my rpi are already taken
can i use an external battery (5V) to power the sensors ?
Ty for ur help
Best regards

PhatFil

... sensor and h/w shields makes it more like leggo a distance sensor for example: https://github.com/arendst/Sonoff-Tasmota/wiki/Wemos-D1-Mini-and-HC-SR04-Ultrasonic-Sensor I think you can find the ldr hook up yourself ;) You will need to learn how to do basic soldering, to solder headers to boards ...

lakerz690

You are my frickn' hero! This code works perfectly, did not even have to make one single change. Thank you so much my friend, you don't understand how grateful I am right now!! You're the best!

lakerz690

That would be great, I'm going to continue to see if I can get Adafruit_CharLCD for python 3. Also, mess around with trying to get this code to run properly. Thank you.

pcmanbob

So here is some code for you to test , note it is untested so there may be errors. #!/usr/bin/python #Libraries import RPi.GPIO as GPIO import time import Adafruit_CharLCD as LCD GPIO.setwarnings (False) GPIO.cleanup() GPIO.setmode(GPIO.BCM) #LCD Pin Select lcd_rs = 25 lcd_en = 24 lcd_d4 = 23 lcd_d5...

pcmanbob

Ok so I guess my assumption that Thonny now defaults to python 3 was correct then. If you want to use python 3 then you need to install Adafruit_CharLCD for python 3 but as I don't know how you installed it for python 2 I cant tell you how to install it for python 3. I don't see any reason that your...

lakerz690

You are a life saver my friend. I believe the example is running on Python 2, like I stated in my first post I am still very new to coding. But when I try to run it with my Thonny IDE it throws an error, when I run it with terminal, all is well. #!/usr/bin/python # Example using a character LCD conn...

pcmanbob

So your LCD works if you run one of the examples provided, that's a start. So did you have to run the example using python 2 or python 3 ? Now all you need to do is add the code to take the distance reading and write it on to the LCD, the example code should have the correct commands within it that ...

lakerz690

So at this point I'm completely lost and frustrated as to why nothing I have been trying is even working. I researched all that I could and tried several different scripts to get this thing to even run. At this point I have just tried to just get it to pull up the distances with only the ultrasonic ...

pcmanbob

Well your code works for the distance measurement and led driving because you said it works, what you don't have is any code to print the result to the LCD. I don't use that particular LCD driver but there should be a command something like lcd.write or lcd.print to write text to the LCD. You should...

lakerz690

I'm using Thonny, it was already preinstalled on the Raspian OS. I will try running it through CMD and see what happens, I wasn't exactly sure if my code checks out, that was my main concern.

pcmanbob

Hi. My first question is which IDE are you using because I believe the ones on the pi default to python 3 now and your code appears to be written for python 2 which means you may also have only installed Adafruit_CharLCD for python 2 also. you could test this by simply running your program from the ...

lakerz690

Hello, I am brand new to this forum and still relatively new to working with the Pi. I am working on a project that consists of the HC-SR04 Ultrasonic sensor, a 16x2 LCD display, and three LED lights. So far the code works with the sensor and LED lights, but I just started messing around ...

RolandDeschain

... figure out how to send data from my RPi to my computer. The data would be a data channel for a level-sensing project I am doing. I have the HC-SR04 ultrasonic sensor rigged in and it is allowing me to calculate liquid level. I have Python code that outputs the distance in centimeters. What ...

Random41

... The cameras are PAL 720x582 140 degree or around that(haven't chosen exactly, but almost all are around that spec), the sensors - either OEM or HC-SR04. Question is: Will Raspberry be enough for this and if yes, then which one, if not - what should I get? Thank you in advance, also - I don't know ...

Search found 1187 matches: SR04

Sonic Sensors

Re: Solution: Dedicating one core to a real-time process

Re: Raspberry Pi Rangefinder Setup

Re: capteurs ultrasons hc-sr04

Ultrasonic Sensor (DistanceSensor) not working

Re: Ultrasonic sensor HC-SR04

Re: Ultrasonic sensor HC-SR04

Re: Ultrasonic sensor HC-SR04

Re: Ultrasonic sensor HC-SR04

capteurs ultrasons hc-sr04

Ultrasonic sensor HC-SR04

Re: How to connect many cables in a nice looking way?

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

Re: HC-SR04, 16x2 LCD, and three LED lights

HC-SR04, 16x2 LCD, and three LED lights

Is it possible to send a number from RPi 3 B to Windows?

Park-Assist