Extension Development: "This extension is enabled but the container is not running"

DuncanODL · July 4, 2025, 10:34pm

As the title implies I am having issues where I upload an extension to BlueOS and I receive an error saying the extension is enabled but the container is not running.

When I check the console logs it also says that it is constantly trying to reconnect.

I had successfully uploaded an extension to read data from the blue robotics bar30 sensor and did not run into this error.

I am fairly new to software dev tools like git and docker so let me know if seeing what I wrote there will help get a better diagnosis.

tony-white · July 5, 2025, 8:49pm

Hi @DuncanODL -
Welcome to the forums!
It seems like the extension is failing to start, does the view logs button show anything?
What is the goal of this extension? It could be conflicting with existing processes if it’s attempting to do stuff with PWM?
If you can share your github repo for the extension, happy to take a look…

DuncanODL · July 7, 2025, 5:14pm

Hi Tony,

View log shows nothing when opened.

Im trying to make sense of the software end of our project and wanted to play around with extension development by making a simple pwm sweeper and trying to connect it to the T200 motor I have on hand.

Im a MECHE so let me know if I am making any cardinal mistakes .

gist.github.com

https://gist.github.com/Duncan-Ford-OffshoreDesigns/23c20568b1a35b89a58c8d5696fd7bd7

.yml

name: Deploy t200 Extension Image

on:
  workflow_dispatch:

jobs:
  deploy-docker-image:
    runs-on: ubuntu-latest
    steps:
      - name: Deploy BlueOS Extension

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Dockerfile

FROM python:3.12.4-slim-bullseye

RUN apt update

# No extra Python packages needed for sysfs access, but leaving this here in case of future needs
RUN pip install --no-cache-dir --upgrade pip

COPY t200-pwm-extension/app /app
COPY t200-pwm-extension/lib /lib
ENV PYTHONPATH="${PYTHONPATH}:/lib"

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app.py

# T200 Navigator PWM Sweeper
# Continuously ramps from 1100 to 1900 and back, printing PWM values

import time
from lib.pwm import NavigatorPWM

if __name__ == "__main__":
    thruster = NavigatorPWM(channel=1)  # Use SERVO1

    try:

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There are more than three files. show original

Cheers,

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