All Questions
304 questions
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31
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I want to use NRF24L01 transceiver with raspberry pi but some GPIO pins are already occupied by 3.5 inch display how do i connect transceiver
26 GPIO pins are already used by 3.5 inch display some of these occupied pins are needed to connect transceiver. I am using NRF24L01 for wireless communication between raspberryPi and arduino
can i ...
0
votes
0
answers
32
views
GPIO pins with pijuice hat
I am currently building a website controlled bb8 based on a raspberry pi 4b, and 2 12v motors controlled by a wma4000 relays module(4 relays, 2 for each motor are used to move forward and backwards). ...
0
votes
0
answers
154
views
Sending Integer Value From Arduino Transmitter to Raspberry Pi Receiver Using NRF24L01+pa
I am currently stuck in getting the integer value from Arduino to Raspberry Pi using NRF24L01+pa. Here are my codes
arduino.ino (transmitter)
#include <RF24Network.h>
#include <RF24.h>
#...
1
vote
0
answers
20
views
2 LCD screens 1 raspberry3B+
I got a raspberry pi 3 B+ and two small LCD screens, this one and this one
The first is attached on the gpio pins, the second one on the hdmi port
the problem is they are just mirroring each other, ...
0
votes
0
answers
362
views
Raspberry Pi Windows GPIO Control
I installed Windows 10 on Raspberry Pi development board. I will read/write by specifying input/output from Raspberry Pi GPIO pins. I know on Raspbian OS but I haven't done it with Windows before. Can ...
0
votes
0
answers
110
views
How can I figure out my Python code with Kivy and Raspberry Pi GPIO?
I try to add actionbar to all screenmanagers in Kivy 2.1.0. I found some solution to my problem but I added some more features like GPIO pinout from Raspberry Pi. Here is a solution without gpio.
I ...
-1
votes
1
answer
91
views
signaling Raspberry Pi with PLC
I want to give signal via PLC to Raspberry Pi and when the raspberry pi gets that signal, it should run the python script and when the python script execute properly and cycle is completed, it should ...
- 1
1
vote
2
answers
366
views
Raspberry PI noise reduction on analogue sensors
I am trying to reduce noise on an analogue sensor.
I have scanned many forums for answers and spent multiple hours / days on finding the optimum solution. I am using ACS712-based sensors and the need ...
0
votes
1
answer
1k
views
Minicom not working
I am trying to connect my Pi 4 running Rasbian 2020 to an Arduino, after making all the connections I try to communicate with the Arduino by using Minicom. However, Minicom doe not respond to anything ...
- 109
0
votes
0
answers
114
views
Consistent Motor control - specifically 180 degrees
I am struggling to get my motors to perform the same on each run. The first time I run the program, they will perform the same movement about 8/10 times. The second time I start the program, the ...
- 121
1
vote
1
answer
428
views
I2C detectable but stopped working - using RasPi 3B, RaspbianOS (and MatLab/Simulink)
Dear community, I'm almost at my wit's end and would be so happy to receive help. It would be a great Christmas present to me if some of you take the time to read and provide inquiry, knowledge or ...
- 11
1
vote
1
answer
724
views
How can I connect raspberry Pi 4 to submersible water pump
I recently handle a part of my team project which is hand sanitizer part came up with the idea of using a raspberry pi to power and control the hand sanitizer system. It's nothing large scale, but I ...
0
votes
1
answer
455
views
How do you program a 1x4 Matrix Keypad in Raspberry pi?
I bought a 1x4 Matrix Keypad https://www.google.com/url?sa=i&url=https%3A%2F%2Fshopee.com.my%2F-Luminense-1x4-Matrix-Memberane-Switch-Keypad-Numpad-Arduino-Raspberry-Pi-i.63040732.4334990197&...
- 1
2
votes
1
answer
3k
views
Audio output on Raspberry pi Zero W
I was trying to take an audio output from piZero-W, the article I followed was,
this one.
How to get audio through the gpio pins to a 3.5mm jack?
When running - systemctl status alsa-state
the result ...
- 21
0
votes
1
answer
949
views
Why is my python script stopping after 1 month?
I'm running three python scripts on a Pi 4 Model B. These scripts are ran from boot using the '.config/autostart function'. I have a batch script placed in 'autostart' which then in turn starts the ...
- 1
0
votes
0
answers
444
views
Using same GPIO pins simultaneously from two Python scripts using RPi.GPIO
I have two different scripts. One is a Kivy app and another is a MQTT client script that subscribes to topics received from a web server. The same hardware connected to the GPIO pins can be used from ...
- 101
0
votes
1
answer
379
views
Hardcode RF Codes - RPi-RF
I would like to use the rpi-rf module https://pypi.org/project/rpi-rf/ for a remote control alert system, using a PIR motion sensor as the input.
I have so far set up the PIR input and send and ...
- 101
0
votes
1
answer
2k
views
wiringPi compile issue on RPi 4B 64bit
I am trying to compile my C++ project using CMake. My Raspberry Pi OS does include /usr/include/wiringPi.h and all the required .so files in /usr/lib/. Here is the output of gpio -v command:
gpio ...
- 51
0
votes
0
answers
110
views
How to take out the noises of the servo motor?
I am using the 3b+ raspberry, while the accelerometer is acquiring data the servo is creating some noises which may give false readings. Does anyone have any idea how to get rid of these noises?
I am ...
1
vote
1
answer
52
views
Bluetooth Ignition need help smoothing out functionality
I have been working on a Bluetooth authorized push to start the ignition in my truck. Right now it's installed and working but I would like to change the function of the button and shorten the time it ...
- 19
0
votes
2
answers
2k
views
Raspberry Pi and ultrasonic distance sensor HC-SR04
So I have my Raspberry Pi, I watched a YouTube tutorial on what to do. I copied absolutely everything, but still, it's not working. The wiring is surely correct as it is copied from the video and the ...
- 1
0
votes
0
answers
203
views
LED strip works through Arduino PWM, but not Raspberry Pi PWM
I've been stuck on this for a while. I'm following a simple tutorial for RPi-controlled LEDs. From this, my LEDs do random stuff and don't light up correctly. I've been trying strandtest from this ...
- 121
1
vote
0
answers
41
views
setup pi3 to work with embedded modem through TXD RXD
how can I configure pi3 (GPIO ) connected to embedded modem through (UART Pin 8-Pin 10)TXD RXD? and how can write python code to control with modem?
- 33
1
vote
4
answers
5k
views
GPIO pins not changing state
I have Raspberry pi 4B, and I want to interact with the GPIO pins. I connected simple LED wiring to physical pin's 37(GPIO25) and 39(GND). After exported pin, and set up mode to "out", I ...
- 21
1
vote
1
answer
5k
views
Raspberry Pi 4 B I2C is enabled but does not work
I have a Raspberry Pi 4 B and I'm trying to set up in I2C Connection with an MCP23018-E/SP I/O-Port-Expander via GPIO02 and GPIO03. I have enabled I2c on the Raspi by:
adding: dtparam=i2c1=on ...
- 11
0
votes
0
answers
139
views
How can I know the serial port of the device of outside (UART)? Not USB
I want to ask. How do I know the serial port of the external UART from Raspberry Pi.
This is a sensor. I connected the wire to the Raspberry Pi. But I can't find which is activate port.
I searched ...
- 9
1
vote
2
answers
368
views
How to measure raspberry pi energy consumption through programs
Is any Device available in the market that can measure the raspberry pi energy consumption and has a mechanism to read that information from my own program?
I explored the specifications of USB meter ...
- 11
-1
votes
2
answers
174
views
GPIO 3.3 V signal still readable after inputting high resistance values
I recently obtained a raspberry pi 4 (8GB) and I am trying to understand the GPIO behavior and ran into an event that I don't understand.
I have set-up a simple script that allows pin 36 (GPIO 16) to ...
- 1
2
votes
1
answer
499
views
connect raspberry pi to fax machine
I want to connect raspberry to fax machine , because I want cypher message before transmit via landline phone .
how can do it , how can interface between rasp and fax machine ?
- 33
0
votes
0
answers
2k
views
How to Disable Hardware SPI Chip Enable/Chip Select?
I'm setting up a Raspberry Pi 4b with a number of Adafruit chips, and thus have used their CircuitPython library to control SPI communication. They've conveniently set up a way to use any GPIO pins as ...
- 1
0
votes
0
answers
258
views
Reading ECU via XCP with RPi
Hello is it possible to connect my RPi with the ECU of lets say my car over OBD interface and XCP and if yes how would I start such a project?
I would like to apply remote analysis of my local ...
- 101
0
votes
1
answer
280
views
Mirror imaging the Raspbian desktop for GPIO screens
How can I make the raspbian desktop look like I am viewing in front of a mirror? (basically backwards) I've already looked in the documentation for config.txt (here is a link) and tried to use rotate, ...
- 31
0
votes
0
answers
399
views
Rpi 4 not booting after adding new i2c bus. changes made in config.txt
I made changes in config.txt to add a new i2c bus to connect a serial display as a temperature sensor is already connected to the default i2c bus.
I took the following steps:
Enabled i2c in Rpi ...
0
votes
1
answer
94
views
problems lighting up LED on pi 3
HI i am new tp pi and python and wanted to create something that simply turns on and off a led.
It does not seem to work and not sure why?
here is the python script:
from gpiozero import LED, ...
- 130
2
votes
1
answer
486
views
Rasberry Pi 3 Pi4j does not work for digital pins other than RaspiPin.GPIO_07
I am trying to get a led working with the Raspberry Pin 3 model B+ with Raspbian. I am using Java Pi4j library this way:
GpioPinDigitalOutput digitalOutputPin = GpioFactory.getInstance()....
- 123
1
vote
1
answer
110
views
Scaling down Raspbian for Adafruit PiTFT 1.14"
I want to use the Adafruit PiTFT (click here) 1.14" with the Raspbian Desktop. How can I scale the Raspbian Desktop down so that it will be normally sized on the 240x135 px screen? An example with ...
- 31
3
votes
2
answers
887
views
Communication between 2 raspberry pi's
I am trying to communicate between 2 raspberry pi's (3B and 3B+), through Gpio's (not uart, just as input output).
So I am making a gpio on one Pi as Input and on the other Pi as output. So can I ...
- 31
1
vote
0
answers
170
views
Selectively disable i2c on Rasbian Buster
I want to disable i2c0 while keeping i2c1 active.
Everything I can find either disables or enables both, but I haven't found a way to only activate one of them.
- 143
1
vote
0
answers
84
views
LIRC null values, Raspbian Buster
I tried to install an IR receiver on my Pi 3B under Raspbien Buster, kernel 4.19.
I managed to install lirc, and when I use mode2 -d /dev/lirc0 I read pulses.
The problem is the following : when I ...
- 11
0
votes
0
answers
517
views
Removing 3.5inch touchscreen and going back to HDMI out
I installed a 3.5inch touchscreen onto my pi 3 model b+, it came with a wee card of the setup lines etc.
That was sometime ago, and now I need to revert the system back to being HDMI output.
I’ve ...
- 1
0
votes
3
answers
2k
views
How fast I can read at raspberry pi 3 model b's GPIO
I want to read the output of OV7670 camera module that produces 8-bit output at a very high frequency. The output pixel clock frequency is around 8MHz. I have to sample those 8-bit data at raspberry ...
1
vote
0
answers
275
views
Raspberry pi 0's GPIO not working (no output)
So I used to use a Raspberry Pi 3B to control my LED strip. It was, of course, an overkill but a fun project.
I now want to do the same but with a Raspberry Pi Zero w. I got one, soldered the GPIO ...
- 51
1
vote
0
answers
71
views
What's the maximum rf fm signal that i can generate using raspberry pi?
I am planning to create a raspberry pi based monitoring system where my raspberry pi acts as a transmitter. I learned that we can use pi to generate FM signals from RPiTX project.
I am planning to ...
2
votes
1
answer
463
views
Can Rpi receive serial/UART data through GPIO pin?
Can I receive data which is transmitted through UART port from a transmitter side raspberry pi on a receiver side Raspberry pi's GPIO pin??
- 41
1
vote
0
answers
16
views
Voice-enabled QnA bot [closed]
I want to develop a custom voice-enabled QnA bot. I am relatively new to the raspberry pi. I want to know if such a project is possible with this kind of hardware that raspberry pi offers. Please ...
1
vote
1
answer
2k
views
writing into fifo file and reading it
1.Transmitter side code:
A)Recording audio into fifo file(no need to create fifo file separately arecord command will create fifo file):
import os
os.system('arecord -D plughw:1,0 -d 0 --rate=19200 ...
- 41
0
votes
0
answers
146
views
Use a 2.5" LCD in a Blaupunkt Dashcam for Raspberry Pi?
and thank you for reading my topic. I recently bought a "2.5" LCD HD Dashcam" from the Blaupunkt brand (BPDV122), although I am aware they have just used this design from another company.
https://www....
- 1
3
votes
0
answers
154
views
Raspberry Pi button bug, what is happening?
I am new user of raspberry pi. I have two buttons, and some code to run, yet the led will not react to the buttons. It's probably a easy fix, but keep in mind, I am new to robotic and have only ...
1
vote
1
answer
1k
views
How to connect EEPROM to Raspberry Pi 3? [closed]
I was wondering on how to connect an EEPROM chip to the Raspberry Pi 3? And any suggestions on which EEPROM chip model is best to use with RPi3?
- 19
0
votes
2
answers
1k
views
txd and rxd pins with same numbers at the end of name
So I was looking at alternate functions of the GPIO pins of the Raspberry Pi 3b+ and found that some GPIO pins do support txd and rxd alternate functions. However some are named txd0/rxd0 and some are ...
- 43