Questions tagged [pigpio]

pigpio is a library for accessing GPIO pins as well as other functions including I2C. pigpio has a client-server architecture , which enables you to remotely control GPIO pins.

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17 views

Pigpio get_pwm_dutycycle returning old values

Using pigpio, I can set the hardware PWM value but getting it seems to consistently give three of the old values, a zero and then the new value, as well as the old value returned with the initial ...
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1answer
31 views

PWM issues with pigpio and RPi.GPIO

I am using Pi Zero W with latest Raspberry Pi OS. I have a backlight of an LCD that I am trying to control via PWM. If I use RPi.GPIO I get flicker at anything other that 100% (or 0%) duty cycle. As ...
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13 views

Pigpio for I2C slave on Pi Zero and the timing of data from the master

I'm using the pigpio library through pigpiod running on a Rpi Zero configured as a slave. The master is an ATMega328PB. On the Pi I am testing using a modified version of the python script provided in ...
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47 views

Rpi python with a PCA9685 PWM controller stopping a digital servo motor problem

I have several servos plugged into a PCA9685 board and controlling them with PCA9685.py, and at the end of the script at pwm.cancel() my SF3218MG (270 degree) and 6221MG (180 degree) servos turn off ...
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1answer
38 views

Issues with Throttle Control on ESC with RPi 3B+

I am using the 30A BLDC ESC to control a brushless motor from my Raspberry Pi 3 B+. The documentation for the ESC can be found here: ESC pdf I seem to have successfully calibrated the ESC, but after ...
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Is there a way to detect when a key is released in curses?

I'm currently working on a robot that uses keyboard inputs to move servos. I'm using the curses python library to control the key inputs, and pigpio to control the servos. Is there a way to detect ...
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1answer
41 views

gpiozero for remote gpio control not work

i just knew how to control gpio from my laptop to desire raspberry pi using gpiozero. so, i following this docs on how to configure the raspberry pi and my laptop to performing remote gpio control. i ...
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2answers
50 views

set specific angle in pigpio set_PWM_dutycycle

I just updated my code to use pigpio instead of RPi.GPIO, the later is working but my robot is trembling like a chihuahua, so I gave pigpio a try. In this piece of code I'm moving my servo, so to ...
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1answer
55 views

Pigpio won't initialise when used by a script started by a service even with root privilege

Problem: I'm writing a Homebridge plugin that needs access to the Pi's GPIO. This plugin uses the pigpio javascript wrapper (https://github.com/fivdi/pigpio) of the pigpio C library (https://github....
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1answer
32 views

cleaning GPIO pins using pigpio module?

I am using pigpio module to control 12 GPIO pins of the Raspberry pi. WHich includes PWM reading, software PWM etc. I couldn't find a method to clean up the pin at the end of the program. Isn't it ...
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26 views

Unexpected behavior with pigpiod after long runtime

for a few months I use python3 with pigpiod (version 71) at Raspberry Pi 3B+ to control some actuators (on/off) and LEDs (on/off/PWM). My dimming algorithm uses the command pi.set_PWM_dutycycle(pin, ...
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1answer
38 views

Segmentation faults on every GPIO STR

I am stuck and hoping for a clue. These lines seem to show the issue. It is for a Pi4. .equ IOBASE, 0x7E200000 .equ GPFSEL2, 0x08 //offset to reg for IO Pins 20 - 29 .align 4 LDR R0, =IOBASE //...
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35 views

Using pigpio and hardware PWM simultaneously

I am using pigpio to read 4 inputs. Everything works fine. And the entire process is a bit long and memory consuming. I also have to use one PWM output. I am planning to use the hardware PWM (pin 12 ...
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64 views

pigpio hardware PWM for servos

My goal is to build a pan/tilt system. this works fine: import pigpio pi = pigpio.pi() pi.set_servo_pulsewidth(13,1055) 2 questions: is pi.set_servo_pulsewidth using hardware PWM (I prefer HW PWM) ...
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41 views

High-precision time-varying PWM outputs on R Pi

I'e seen a lot of examples of simple PWM on the Pi where relatively high-precision PWM signals at a fixed duty cycle can be generated using WiringPi or pigpio in hardware PWM mode. I have tried ...
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26 views

pigpio: Read PWM from RCcontroller then send to ESC via GPIO

Im trying to learn Python by combining my interest in designing an AWD radio controlled car (3D printed, Im decent with Fusion 360 too) with some smarts from Pi/Python to allow things like software ...
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1answer
103 views

PIGPIO without sudo

I am working on setting up an automated deployment of an executable using the PIGPIO C bindings to a Pi Zero. I copy the executable to the pi (into a directory on pi user's desktop) as expected, but ...
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1answer
49 views

Servo motor keep shaking while using software PWM to drive

Greet everyone, I am using JavaScript with pigpio to develop my learning project. How come my servo motor keeps shaking when I drive it by program PWM? codes are posted as follow: var servo1GPIO ...
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pigpio servo, stop command not reliable

import pigpio import math import RPi.GPIO as GPIO from gpiozero import Button import time GPIO_SERVO_PIN = 27 limit = 17 switch = Button(limit) GPIO.setmode(GPIO.BCM) GPIO.setup(17, GPIO.IN, ...
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1answer
34 views

pigpiod callback is exiting my code

I have the following code: def read_adc(adc, lsb): # first read adc.writebytes([0x8E]) # ask for channel 0 my_bytes = adc.readbytes(2) # read channel value = (my_bytes[0] << 3) print(value*...
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1answer
35 views

How to work several GPIO pins with shell script

I realise that this is a newbie question but no where on the internet do I find the answer. I want to control a couple of GPIO pins on Pi (3+mod A, Buster) so I write a simple shellscript. Its using ...
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1answer
44 views

Writing to GPIO 1 (ID_SC) witth Pigpiod C interface

I am writing a general-purpose stepper motor driver C shared library for the Raspberry Pi using PIGPIO (pigpiod C interface) for 4 to 7 motors using A4988 drivers. I designed an interface board (...
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0answers
107 views

JavaScript library for the HC-SR04 Ultrasonic sensor

I wired the sensor to my Raspberry Pi. My aim is to use JavaScript to get a live reading in the console of the distance, but the module I found has been archived by the author. Code that I found on ...
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116 views

Problem with pigpio library and infrared emitter

I have installed an infrared emitter with the following tutorial: https://www.instructables.com/id/Zero-to-Air-Conditioner-Controller-With-Raspberry-/ But I had trouble running the LIRC commands, so ...
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78 views

Pigpio Hardware PWM callback is slow

I am trying to drive a servo motor with Raspberry pi. I have selected pigpio library to access GPIO. I need to send a specific number of pulses with a given frequency. But when I callback a function ...
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1answer
33 views

PIGPIO instance in an object: object has no attribute 'pi' [closed]

How the heck do I create and use a pigpio instance inside an object? I feel like this should work? import pigpio class MyClass(object): def __init(self, pin_wake=8): self.pi = pigpio....
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1answer
197 views

Raspberry Pi 4 to Mitutoyo Digimatic interface

I've been trying to interface a Mitutoyo digital caliper. I used the code from here and I think I made the right corrections according to the posters comments but as I checked he was last online in ...
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42 views

Raspberry Pi controlled RGB LED strip very dim

I have followed this tutorial https://dordnung.de/raspberrypi-ledstrip/ to hook up my raspberry pi zero w to a 12V rgb led strip. The lights come on and are able to be controlled using pigpiod, ...
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37 views

PiGpio – pass through binary data

I have two ports connected to GPIO on a Raspberry, where I read and send data NMEA sentences to external equipment using the PiGpio library in python, and this is working fine. Now I need to transfer ...
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1answer
43 views

Remote GPIO transfer protocol

Wondering about host to host security concerns when using Remote GPIO (with pigpio). An open port is very likely to be insecure, I understand that. After googling there are some questions that I ...
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163 views

Raspberry 3 model B v2 I2c slave, ESP8266 I2c master

I try to learn I2C with goal : read my ESP8266 events (I2C master) from my Raspberry 3 model B v2 (I2C slave). I use the Arduino Wire library on the ESP and python pigpio lib on the Raspberry. ...
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0answers
34 views

pigpio library dependencies missing when compiling Radiohead nRF24 library

I am using Eclipse 2019-06 CDT to compile the Radiohead nRF24L01 library (v1.97) using the pigpio interface (v71) with C++. I get the following errors: rpi/rfs_pizw2/usr/lib/libpigpio.so: undefined ...
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1answer
49 views

pigpio long wave results in PI_TOO_MANY_CBS

I'm driving a stepper motor with a PI4B and pigpio / Unosquare.PiGpio library for .NET. I'm using the wave module to modulate the pulse to drive the stepper motor. This works pretty good, until I ...
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1answer
112 views

How can you use pigpio's set_servo_pulsewidth with an i2c address?

I've tried to use hexadecimal for the GPIO address to see if it would work with GPA0 on the MCP23017 import pigpio import time pi = pigpio.pi() gpio_num = 0x21 while True: pi....
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1answer
380 views

Bipolar stepper + L298N

I have a bipolar stepper motor with the following datasheet And a L298N driver wired like this: I tried the 3 NPM packages available for the L298N driver, but none of them work with my set up, the ...
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0answers
34 views

Problem with PI GPIO using BB SPI

I've developed a PI Python application to replace an old control card which sent bit banging out to daisy chained LED drivers. It all works fine except when I need some fast updating of the LED's. ...
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1answer
71 views

How can you use pigpio to set a specific position for a continuous rotation servo?

Running my code with a normal 180 degree servo will move it to a user-specified angle and then hold it there. But when using a continuous rotation servo, it keeps rotating constantly for 500 <= ...
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1answer
97 views

Using pigpios waves and audio output

I am using a Raspberry Pi 3 B+. I want to play audio through the 3.5mm jack and use PWM at the same time or successively to simulate a IR-Remote. I know that you can't use the hardware PWM while ...
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2answers
116 views

433mhz Status sockets project

I've been working on getting a Home automation project going for a while, using a Rasp pi 1b (26 pin header). This is a well trodden path by others, as it is a project to control status remote sockets:...
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1answer
61 views

pigpio.error: 'no permission to update GPIO' Only on some pins

I am having an issue where I get this error 'no permission to update GPIO'. whenever I try to address certain gpio pins. I looked at other posts that had similar issues but they seemed to have either ...
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2answers
588 views

AC mains dimmer dimming 7W LED lamp problem (RpiZero + MPDM V4.1)

I'm trying to dim a 7W LED with a Raspberry Pi Zero for home automation. However it doesn't work as expected. I followed this tutorial : https://www.youtube.com/watch?v=wqY4-gHqvZI . I have the exact ...
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1answer
74 views

What is the frequency and cycle length of the pigpio library?

I've got a raspi 3b with an esc and a brushless motor attached. I can run the motor using pigpio the following commands: # First start the pigpio daemon sudo pigpiod # calibrate the esc pigs s 12 ...
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2answers
172 views

Why are some services only listening on IP6

I have previously asked a question Cannot remotely connect to pigpiod (now deleted) but never resolved the issue. This is a more generic question. sudo ss -lntp State Recv-Q Send-Q Local ...
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1answer
144 views

PIGPIO problem with delay on scripts

I am trying to run an old Raspberry Pi 2011.12 as a server to control a RGB LED strip. To this I am using PIGPIO since this is the best solution (RPi.GPIO is software based, which creates flickering). ...
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0answers
117 views

A stop job is running for Daemon required to control GPIO pins via pigpio

Since I installed Buster I have experienced slow shutdown. A message is displayed:- A stop job is running for Daemon required to control GPIO pins via pigpio and persists for 90 seconds. I have ...
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1answer
63 views

pigpio bsc_xfer_t char problem

I am implementing an I2C slave in c with PIGPIO and I have run into a snag. I want to send numbers. The struct is typedef struct { uint32_t control; /* Write */ int rxCnt; ...
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1answer
44 views

Counting Two Pulses Generated By Rotating Motor

I want to Count pulses based on some Conditions which are: (1) Count all the rotations generated during motor Rotations. (2) Count all the motor rotation pulses when an additional signal is enabled. ...
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1answer
84 views

PIGPIO not detecting I2C device but i2cdetect -y 1 detects it and I can even run my codes well in SMBUS

I have a Raspberry Pi 3 Model B+. My I2C device which is this (exact breakout board) isn't getting detected through PIGPIO Library. The sensor works very well with the example codes which uses SMBUS ...
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1answer
68 views

Python boot run script act strange with GPIO (software serial)

I put my python script as boot running(rc.local) on my headless Rpi 3B+. It meant to controls three identical devices through serial cable and I am using GPIO PINS[17,27,22] for the software serial. ...
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1answer
65 views

Not able count Pulses Generated by PLC

I am using the below code to capture the pulses and count pulses for a specified interval but the output not as what i expected. For every pulse it is giving uncertain value. The pulse i want to ...

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