Questions tagged [rpi.gpio]

rpi.gpio refers to the package name of a Python module for accessing the Raspberry Pi's GPIO pins. The module allows GPIO pins to be initialised, turned on, and turned off. It uses a functional programming style.

Filter by
Sorted by
Tagged with
2
votes
2answers
1k views

pull up resistors from rpi-gpio.js

I want to use the internall pull down resistor. In python the setup method accepts a parameter for that, like: GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP) according the rpi-gpio.js ...
0
votes
1answer
497 views

Frequent missing data error on DHT11

First of all, as this question involves a raspberry, python, Rpi. Gpio module and hardware build, I thought this was the place for it. In the past I've done some work around Dht11 sensor and python ...
0
votes
1answer
49 views

Module not found Error

I am working on rasberry3 pi b+ model for my project and I did installed NOOBS zip file and stored in Micro SD card and put in SD slot on Rasberry Pi b+. When i'm compiling my python code for my ...
0
votes
1answer
352 views

Connect multiple concurrent MCP23017 to Raspberry Pi

So I want to control multiple (12) RGB LEDs using the raspberry pi. I have 6 connected to the GPIO ports on the pi itself and want 6 connected to 2 MCP23017. I cannot seem to get them both to show up ...
1
vote
1answer
47 views

writing into fifo file and reading it

I want to receive audio data from UART of raspberry pi 3b into a FIFO file and want to play the same at 3.5mm audio jack. Is it possible? Any suggestions, please! Code is written below: (Make a ...
1
vote
1answer
158 views

Two stepper motors with python

I want to make a motorized rc paddle boat type machine for fun. I plan to use two stepper motors to spin two wheels on either side of the boat. I am controlling it with python. I have a master script ...
0
votes
0answers
26 views

What happens if a GPIO “in” pin is accidentally configured as “out”?

I have a 433MHz receiver connected to a GIPO pin (which is configure as "IN"). I was wondering what happens if the GPIO is accidentally configured as "OUT" during reboot, shutdown, or when another ...
2
votes
1answer
99 views

Voice transmission through UART

I want to transmit real time voice signal recorded by usb MIC through uart using Raspberry pi 3b. But by using USB MIC it is not possible for me to transmit voice to uart directly without storing it. ...
1
vote
1answer
23 views

I run thonny and have no module name RPI error

I run Thonny on a pi zero.(i am a beginner) want to activate gpio i get an error" import rpi.gpio as pigo, modulenotfounderror: no module name 'rpi'. i have update library. still not working.
0
votes
1answer
1k views

Setting up Sensiron SHT1x Humidity/Temperature probe

Other view of wiring I've been trying to set up the SHT10 sensor from adafruit.com and have been having problems. I think I have the sensor connected properly to my raspberry pi 3 through a ...
1
vote
1answer
496 views

Raspberry Pi 3 with Feetech FS90R servo

Currently I have a very basic setup where I have a FS90R continuous servo running on a my Raspberry Pi 3 using Windows IoT and a C# based application. I'm trying to get the servo to pin using the ...
0
votes
1answer
1k views

Wiegand GPIO read not working all the time. Works most times but hangs on some reads

I'm extremely new to Python, I've been learning a bit over the last couple weeks. This is what I've managed to come up with. I'm pretty over the moon the code works most of the time but it doesnt work ...
2
votes
3answers
216 views

Is there any built in LED connected with GPIO pin?

In Arduino a built in LED is attached with number 13 Digital pin. Is there any LED like Arduino in Raspberry Pi,which I can use to test my code?
1
vote
2answers
2k views

Is the gpio readall command compatible with RPi 4?

It's already a while since I got my Pi 4, but never used the gpio readall command until yesterday. I have run into an interesting error. pi@raspberrypi:~ $ gpio readall Oops - unable to determine ...
1
vote
2answers
51 views

Whenever I restart my Raspberry pi 4, GPIO pin number 3 goes high and low very fast (bug in pi?)

I just switched from Raspberry Pi 3 to 4, which I use to control some devices. I just discovered that whenever Raspberry pi 4 boots, it changes the pi state of GPIO pin number 3 very fast from low to ...
1
vote
1answer
637 views

Raspberry Pi - Press for on / Press for off switch

I've begun tinkering with using electronics and am also new to using Python. I was wondering if someone could help me please? What I'm trying to achieve is to use an on/off switch to run a motor - ...
1
vote
1answer
1k views

Need a GPIO button to stop the currently playing mp3 file

I am using a RPi3 in a museum to connect to 2 buttons via GPIO. Each button plays an mp3 file. I used the Adafruit guide here: https://learn.adafruit.com/playing-sounds-and-using-buttons-with-...
2
votes
1answer
6k views

How to set a GPIO pin to default HIGH before setting it to output?

I have a raspberry pi connected to a Sainsmart 4-channel relay, where each relay is activated by a LOW signal. When I set a GPIO pin to output, it defaults to LOW, which of course activates the ...
3
votes
1answer
85 views

Sending a binary data stream to a GPIO at a certain frequency

I would like to send a random binary data sequence to a rpi GPIO at a particular frequency and then read the data stream off a scope. Is there a way of implementing this through python?
0
votes
1answer
94 views

/etc/init.d/lirc doesn't exist

I am working on creating an IR remote for an older TV using my GPIO, primarily using this tutorial http://www.raspberry-pi-geek.com/Archive/2015/10/Raspberry-Pi-IR-remote#article_l1. However, when I ...
1
vote
1answer
2k views

Problem with ESC, brushless motor and Raspberry Pi

I have connected an ESC (an electronic speed control) with a battery and a brushless motor. The Raspberry is connected to the ESC to control it. I know - when I turn on the program that is on the ...
3
votes
2answers
508 views

How to connect ST7789 LCD to SPI Bus 1 as 2nd screen?

I've been trying to get this ST7789 library working with the 240x240 1.3" display on the rpi0w Python lib https://github.com/solinnovay/Python_ST7789 So far I've set all the screen pins to the bcm ...
0
votes
1answer
461 views

RPi.GPIO not working at all

I have just started with the GPIO on my raspberry pi but can't get any of the code to work. import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(18,GPIO.OUT) ...
0
votes
0answers
20 views

Is it possible to consistently apply voltage to two or more devices?

I want to connect two or more of the following actuators to my raspberry pi: https://www.ebay.com/itm/Nano-Magnetic-Actuator-diy-micro-plane-model-servo-micro-actuator-0-5g-/183745663278 However, ...
0
votes
1answer
21 views

Is it possible program GPIO PINs using Microsoft MakeCode?

It is possible to run Microsoft Make Code on a Raspberry Pi. But it looks like I can select a bunch of boards but not a Pi. Is it possible to program the GPIO pins on the Pi by running Make Code on ...
0
votes
3answers
5k views

Error installing RPI.gpio

I'm a new enthusiast trying to learn with raspberry pi so I apologize if I don't use the correct programming terms... The problem that i'm having at the moment is that when I try pip install rpi-gpio ...
0
votes
1answer
1k views

ImportError: No module named 'RPi'

I am trying to make a humidity sensor using this code import RPi.GPIO as GPIO import dht11 import time import datetime # initialize GPIO GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.cleanup()...
0
votes
1answer
884 views

How can I turn on/off LED of RPi.GPIO in the same number key?

I am trying to write the following program (8Relay.py) using python on the Raspberry Pi. I want to use the input from a GPIO pin to turn an LED on or off, depending on what input was pressed (1~8). ...
4
votes
2answers
8k views

How fast can GPIO pins toggle?

I'm currently using Python's RPi.GPIO module to toggle some pins, and I want to know how quickly it can do this. I need the pins to be toggled on the schedule of a ~50 mhz FPGA clock, which I'm ...
0
votes
1answer
43 views

2 Motors functioning unevenly - right motor gets more power than the left

I'm trying to execute this piece of code to run 2 motors on my robot. The code is really simple it's just repetitive. For some reason that I can't figure out, the motors run unevenly. Here is the ...
0
votes
1answer
39 views

Turn On/Off 3D printer projector with Python/GPIO

There are similar questions but I don't want to turn on the LED but the 3D printer projector(NQM Plus Light engine) for the image projection. The pins that I wanted to use are shown in the picture. ...
0
votes
2answers
1k views

Unable to read the RS232 attached GPIO pins the same way as USB serial port on Pi3

I maybe new to this, but I have the following configuration in place. Step 1: (Device 1){RS232}<=======(RS232 to USB cable)=======>{USB}(Pi) I have an RS232 to USB cable attached to the USB port ...
1
vote
1answer
4k views

How to start and stop python script using button

I've written some python code that should start and stop another python script (Datalogger) when a button is pressed. So when the Pi is booted up I'm wanting the button script to run and then once I ...
1
vote
1answer
1k views

Why is PIR motion Sensor always on?

I'm trying to make an alarm system but the motion sensor is always on as soon as the script is run. I've posted a question about a different problem i was having with this project so it'll confusing ...
1
vote
0answers
430 views

How to connect ST7789 LCD to Raspberry Pi

I'm trying to connect to this LCD ( sry 4 japanese page:( use translate plz ) This monitor driver is ST7789, 7pins.[GND VCC SCL SDA RES DC BLK] And now I'm connecting to pi like this https://imgur....
0
votes
0answers
25 views

How to make more efficient reading of GPIO

My (python) program (on Raspberry Pi zero W) turns on/off a GPIO pin (connected to a relay module) depending on the RSSI signal of my phone (connected via bluetooth) and the status of one more GPIO ...
1
vote
3answers
209 views

How Can Rpi3B+ Detect MQ9 Gas Sensor's Carbon Monoxide Leakage, Without Using ADC?

I already have bmp180 sensor connected to raspberry pi 3b+, now I want to add MQ9 sensor like this https://e-radionica.com/en/mq9-gas-sensor.html Is connection straight forward like the bmp180? ...
0
votes
0answers
29 views

Timed trigger for GPIO input

I'm running a raspberry pi system that records fish as they swim passed an IR break beam sensor at a fish ladder. So far the system works well but I'm trying to cut down some of the false triggers. ...
0
votes
1answer
53 views

GPIO.event_detected() Python3 IDLE vs Shell execute startup

I have a script with GPIO.event_detected(port) to count number of times a hall effect sensor is initiated. My script works amazing when executed in python3 IDLE run module. Counts are accumulated per ...
2
votes
0answers
28 views

PWM on pump not working as expected

I am attempting to run a PWM on a pump using rpi.GPIO using the following code: def run_PWM_on_pump(): gpio.setmode(gpio.BOARD) gpio.setup(8, gpio.OUT) p = gpio.PWM(8, 0.5) #also works at ...
1
vote
1answer
36 views

GPIO.input(24) is coming back True when it shouldn't be (false button presses)

I have a button in a working circuit. Within sys/class/gpio/gpio24, value changes properly (it becomes 1 when pressed down, 0 otherwise). When I use GPIO.setup(24, GPIO.IN) within python, GPIO.input(...
1
vote
1answer
290 views

Raspberry Pi 3 GPIO pins always active

Wiring setup for Rpi: I have an rpi 3, and I've recently started experimenting with the GPIO side of things. I'm new to electronics in general, although I do computer programming regularly. I have a ...
0
votes
2answers
107 views

Writing to GPS HAT on Raspberry Pi Zero W Never Returns Anything

I have attached a GPS HAT to a Raspberry Pi Zero W running RASPBIAN STRETCH WITH DESKTOP. When I SSH in to run a simple Python script that writes to the HAT serial port, nothing happens and I am not ...
0
votes
1answer
56 views

How to run cylonjs in Raspberry-pi

I am trying to run cylon framework. I installed it using these instructions. Now I am trying to execute this sample LED blinking program. var Cylon = require("cylon"); Cylon.robot({ connections: {...
4
votes
5answers
18k views

gpio library on windows while developing

I am new to Python so maybe this is not an appropriate question. I am working on a project on Python that will use GPIO functionalities of the raspberry Pi. Right now, I am developing the python code ...
0
votes
1answer
169 views

Barcode Scanner using RX & TX (GPIO) PIN

Im having some issues reading from a barcode scanner module.. The scanner works just fine if it is used with a USB adapter, my goal is to use the RX & TX GPIO of my RPi to control it. What I am ...
3
votes
2answers
2k views

Where are the uarts on the raspberry pi 4?

The raspberry pi 4 has at least two uarts (as shown here), I know where I can connect to one of them. Pins 8, 10 and 12 have a uart as an option. Source: This site describes accessing uart1, where ...
2
votes
1answer
143 views

How to connect EEPROM to Raspberry Pi 3?

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?
0
votes
1answer
344 views

Pi 3 reboots when GPIO 13 is given 3V

simulate this circuit – Schematic created using CircuitLab I am taking the 3V from Pi and giving it to COM of a relay. The NO goes to GPIO 13 of the same Pi. I have a 120V line that triggers ...
0
votes
0answers
57 views

pad4pi (rpi_gpio) Library “registerKeyPressHandler” not working as expected

I'm currently writing a python program, that initializes the fingerprint sensor at first then showing the number of used templates on the fingerprint sensor after pressing "1" on the matrix membrane ...