Questions tagged [rpio]

For questions about the usage of the RPIO Python library. For general questions about the Pi's GPIO, instead use [gpio], not this tag.

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I need help making a raspberry pi zero w Cluster

I want to make a raspberry pi zero w Cluster but I want to make the main computer my raspberry pi4. But I can’t find any Tutorials that have this case. I already have 11 pi zeros an internet switch ((...
Isaac Clark's user avatar
-1 votes
1 answer
37 views

Latching IO using gpiozero

Im working on doing some remote GPIO control (de)energizing relays. When I turn a relay on, it instantly turns off. That makes me assume that the output doesn't latch. I tried several of the ...
addohm's user avatar
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Incorrect values coming from 4-20mA ADC receiver

This is what I have. Raspberry Pi3 i2c shield. https://store.ncd.io/product/i2c-shield-for-raspberry-pi-3-pi2-with-outward-facing-i2c-port-terminates-over-hdmi-port/ 1-Channel 4-20mA Current Loop ...
Kevin Vasko's user avatar
2 votes
1 answer
1k views

How to use GPIO interrupts without going to multi-threading [closed]

Using a Pi 3+ in an animated display. The servos in the display are run from a 16 channel "bonnet" on the Pi. I am using RPI.GPIO to deal with GPIO issues. What I want is for one set of ...
Goose23's user avatar
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1 answer
349 views

ImportError:python2.7/dist-packages/RPIO-2.0: undefined symbol: makedev

I have a problem with RPIO. I am running a face recognition using OpenCV python on Raspberry Pi 3B+. pi@raspberrypi:~/facerec-pi/code $ sudo python capture-positives.py Tradeback (most recent ...
Thang Nguyen's user avatar
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1 answer
155 views

Raspberry Pi 0 W spontaneous event triggering for an input pin

I have two "Cylewet 25Pcs AC 1A 125V 3Pin SPDT Limit Micro Switch"-es that are normally open and connected to two of the Pi pins with internal pull up resistors. Left unattended, they call ...
Plamen's user avatar
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2 votes
1 answer
228 views

How to implement the push button example using rpio?

Background I am trying to learn how to use the rpio library (https://github.com/jperkin/node-rpio) in my nodejs application. What do I want to do So far I have been able to test the blink led ...
Roger Peixoto's user avatar
2 votes
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134 views

Image rollback using Raspberry Pi Bootloader

I'm using Yocto framework based RPi build and have created My SD card partition as follows, ======================== SD card with 3 parts ======================== | 68MB(bootloader) | 4GB(...
Rajesh S's user avatar
1 vote
0 answers
1k views

Profibus with rpi master and slave

I am newbie to profibus-DP . I am tasked with building profibus master and slave network using Rpi and Rs-485 convertor . One Rpi will be master and other will be slave. I am using https://github.com/...
Zaks's user avatar
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4 votes
1 answer
1k views

RS232 to Raspberry Pi Zero W

I know this may be a dumb question but can you connect a RS232 Tx, Rx, and Ground from a device directly to the Rx, Tx and Ground on a Raspberry Pi Zero without having to get a Max3232 or something ...
Michael H.'s user avatar
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RPIO setting: is DELAY_VIA_PCM a hardware PWM?

So I have a project that is going to use audio and need to do some PWM to control a motor. As I understand it (and I could be very wrong here), there are two chips a pi can use to produce PWM. In ...
Eric G's user avatar
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2 votes
0 answers
1k views

Permission issue accessing /dev/mem – gpio node-rpio

I am somewhat of a newbie, so please let me know if there is a way I can go about this better. I'm working on doing some LED coding (WS8201 strip) with node.js and it appears I am having trouble ...
natoPotato's user avatar
2 votes
2 answers
7k views

This module can only be run on a Raspberry Pi! [closed]

I'm running daemon python file in virtualenv and has a Error: File "rpi_daemon.py", line 5, in <module> import RPIO File "/home/pi/python_virtualenv/local/lib/python2.7/site-packages/...
Hữu Linh Nguyễn's user avatar
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1 answer
2k views

Read GPIO pin on web page

I was able to control an led from a web page using the following code. when I call http://myip/pinon.php it will light up the LED and http://myip/pinoff.php will turn off the LED. pinon.php <?php ...
san's user avatar
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1 answer
449 views

Node.js packages reading moisture sensor: State never changes

I've written similar code in python that works as expected. Using one of these moisture sensors: https://www.amazon.com/dp/B00ZR3B60I The following code always prints "true" const rpio = require('...
J.M.'s user avatar
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How to generate a hardware PWM wave for driving an LED through RPIO?

I've looked through the documentation of RPIO, and used GPIO18 to get my PWM up and running. This is my code: from RPIO import PWM servo = PWM.Servo() servo.set_servo(18, 4000) As explained in the ...
user8244's user avatar
  • 101
-1 votes
1 answer
407 views

convert py file for RPIO to RPi.GPIO [closed]

According to Joan's instruction. First, git clone https://github.com/metachris/RPIO.git cd RPIO sudo python setup.py install sudo python3 setup.py install and sudo python3 jjy.py I made a jjy ...
Hyundeok Lee's user avatar
1 vote
1 answer
943 views

Pulse with Subpulse on raspberry Pi

I need a signal at the output of the GIPO of approximately this shape.(sub-pulse in pulse) How can this be implemented using PWM on PI? Im trying do it with RPIO,but his ancient GPIO pinout maybe ...
Dmitrii's user avatar
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3 votes
2 answers
2k views

What is the minimum current value into the Pi's GPIO input?

What the minimum current input that must be provided to Pi's GPIO input in order to get high value? The idea: I will be adding Microwave Doppler which output are in micro amperes. I want to know if ...
Audrius Gailius's user avatar
1 vote
1 answer
2k views

Can't Install RPIO -- "Python.h" and 'arm-linux-gnueabihf-gcc' error

I'm having an issue where RPIO will not install. When running sudo pip install -U RPIO it returns the error : source/c_gpio/py_gpio.c:28:20: fatal error: Python.h: No such file or directory #...
Seph Reed's user avatar
  • 311
0 votes
0 answers
30 views

HDMI output is off once I connected my pi to an oscillscope

I connected the +5v and gnd of my raspberry pi to an oscilloscope. Once I did that, my screen gave me a blank screen as if it is not getting any output from HDMI of raspberry pi. I turned off/on the ...
MAS's user avatar
  • 101
2 votes
0 answers
512 views

GPIO problem. RPIO terminal issue

If I run gpio readall, everything works fine and I see all GPIOs. Terminal: rpio -i 7 Result: root@raspberrypi:/home/pi# rpio -i 7 Traceback (most recent call last): File "/usr/local/bin/rpio", ...
Yevgenii Shashkov's user avatar
2 votes
2 answers
744 views

RPIO PWM and AfroESC

I'm working on a quadcopter controlled by a Raspberry Pi 3 and I'm having some issues controlling the Electronic Speed Control (ESC). I'm a bit of a newbie so please be patient. I bought the Afro ...
DavideGalifi's user avatar
2 votes
2 answers
5k views

Solder RCA cable directly to Raspberry Pi 2 Model B

It is my understanding that you can use an RCA interface with a Raspberry Pi by using a 4-pole 3.5mm jack (image below) - I have a portable screen with RCA inputs I'd like to solder directly onto my ...
user54273's user avatar
3 votes
1 answer
2k views

RPIO not working on Pi Zero, Pi2, or Pi3

How do you use RPIO on a Pi Zero, Pi2, or Pi3? When I run an RPIO script I get a Python error message such as RuntimeError: rpio-pwm: Page 0 not present (pfn 0xa100000000015bba)
joan's user avatar
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