Azure IoT edge solution module (Dockerfile)- RPi.GPIO RuntimeError on raspberry pi

Question

Hi everyone ,  I created a solution module (python) using VS code for Blinking Led on raspberry pi . To make use of RPi pins installed RPi.GPIO library and created a docker image . When i run this docker image on raspberry pi its throwing a run-time error which is as follows.



Traceback (most recent call last):

File "main.py", line 8, in <module>

GPIO.setup(18, GPIO.OUT)

RuntimeError: No access to /dev/mem. Try running as root!



main.py program

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#!/usr/bin/env python
import RPi.GPIO as GPIO
import time

# Configure the PIN # 18
GPIO.setmode(GPIO.BOARD)
GPIO.setup(18, GPIO.OUT)
GPIO.setwarnings(False)

# Blink Interval 
blink_interval = .5 #Time interval in Seconds

# Blinker Loop
while True:
 GPIO.output(18, True)
 time.sleep(blink_interval)
 GPIO.output(18, False)
 time.sleep(blink_interval)

# Release Resources
GPIO.cleanup()

Dockerfile.arm32v7

FROM resin/raspberrypi3-debian:stretch

WORKDIR /app
ENV PYTHONUNBUFFERED=1
RUN [ "cross-build-start" ]
RUN echo "deb http://deb.debian.org/debian jessie main" >> /etc/apt/sources.list
RUN sudo apt-get update  && sudo apt-get install -y \
    build-essential \
    python-dev \
    python-pip \
    python-setuptools \
    swig \
    zlib1g-dev 

COPY requirements.txt ./
RUN sudo pip install --upgrade pip
RUN sudo pip install -r requirements.txt 
RUN sudo apt-get install RPi.GPIO

COPY . .

CMD ["sudo", "python3","main.py" ]

RUN [ "cross-build-end" ]

and attaching error screenshot

Thanks for your time

Answer 1

Hello nagamma,

Thank you for your feedback! Please understand that this forum is to discuss Azure IoT Edge topics. Can you point us to the tutorial you are following and confirm that you are using Azure IoT Edge?

Thanks!

ASA

Answer 2

 Thank you for your information. can you please tell me where I can put my queries related to Azure IoT Edge.

Answer 3

Hi,

If you are following a document and not able to complete the tutorial you can add an issue directly to the doc.

Here is also the suggested place to discuss Azure IoT Edge topics if they do not relate with a doc (as I believe is the case). 

I have misread your question and thought you were reporting an issue related with Raspberry Pi GPIO only - thanks for double click that you are using Azure IoT Edge Modules.

I found two related threads on StackOverflow:
- https://stackoverflow.com/questions/51769717/not-able-to-deploy-python-program-from-azure-iot-edge-to-rasberry-pi
- https://stackoverflow.com/questions/25845538/how-to-use-sudo-inside-a-docker-container

Have you tried it before?

provided below in the createOptions:

{
    "HostConfig": {
        "Devices": [
            {
                "PathOnHost": "/dev/gpiomem",
                "PathInContainer": "/dev/gpiomem",
                "CgroupPermissions": "rwm"
            }
        ]
    }
}

Thanks!

Answer 4

    

It's worked for me .

Thank you sir.