.devcontainer/Dockerfile

@@ -0,0 +1,77 @@
+
+FROM roxauto/circuitpython:9.0.4
+ARG USERNAME=dev
+ARG UID=1000
+ARG GID=1000
+ARG PROJECT=adafruit-asyncio
+
+
+# Create the user
+RUN groupadd --gid $GID $USERNAME \
+    && useradd --uid $UID --gid $GID -m $USERNAME \
+    #
+    # [Optional] Add sudo support. Omit if you don't need to install software after connecting.
+    && apt-get update \
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+# dialout group
+RUN usermod -a -G dialout $USERNAME
+
+# install packages
+RUN apt-get install -y \
+    locales \
+    mc \
+    tree \
+    git \
+    make \
+    wget \
+    libusb-1.0-0 \
+    net-tools \
+    iproute2 \
+    iputils-ping
+
+# cleanup
+RUN rm -rf /var/lib/apt/lists/*
+
+# set locale
+RUN export LC_ALL=en_US.UTF-8
+RUN export LANG=en_US.UTF-8
+RUN locale-gen en_US.UTF-8
+
+RUN pip install --upgrade pip
+
+# install user packages
+COPY requirements.txt requirements.txt
+RUN pip3 install -r requirements.txt && rm requirements.txt
+
+
+USER ${USERNAME}
+RUN echo 'export PS1="🐳  \[\033[1;36m\]'"${PROJECT}"' \[\e[33m\]\W\[\e[m\] \[\033[1;36m\]# \[\033[0m\]"' >> ~/.bashrc
+
+ENV PATH="${PATH}:/home/${USERNAME}/.local/bin"
+
+WORKDIR /home/${USERNAME}
+
+
+# setup folders for saving vscode extensions
+# https://code.visualstudio.com/remote/advancedcontainers/avoid-extension-reinstalls
+RUN mkdir -p /home/$USERNAME/.vscode-server/extensions \
+    && chown -R $USERNAME \
+    /home/$USERNAME/.vscode-server
+
+
+# build timestamp
+USER root
+RUN echo ${PROJECT} >> /build_date.txt && \
+    date >> /build_date.txt
+
+# remove bundle asyncio
+RUN rm -rf /usr/lib/micropython/asyncio
+
+
+USER ${USERNAME}
+WORKDIR /home/${USERNAME}
+
+

.devcontainer/devcontainer.json

@@ -0,0 +1,32 @@
+{
+  // use Dockerfile
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": "."
+  },
+
+  "initializeCommand": "mkdir -p /var/tmp/container-extensions",
+
+  "mounts": [
+    "source=/var/tmp/container-extensions,target=/home/dev/.vscode-server/extensions,type=bind,consistency=cached"
+  ],
+  // environment variables
+  "containerEnv": {
+    "MICROPYPATH": "/usr/lib/micropython:/workspaces/${localWorkspaceFolderBasename}"
+  },
+
+  "runArgs": ["--network", "host", "--privileged"],
+  // // Configure tool-specific properties.
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "shardulm94.trailing-spaces",
+        "njpwerner.autodocstring",
+        "mhutchie.git-graph",
+        "donjayamanne.githistory",
+      ]
+    }
+  }
+}

.devcontainer/requirements.txt

@@ -0,0 +1,7 @@
+circuitpython-stubs
+invoke
+mpremote
+mypy
+pylint
+pytest
+ruff

examples/asyncio_simpletest.py

@@ -1,4 +1,25 @@
 # SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
 # SPDX-FileCopyrightText: Copyright (c) 2021 Dan Halbert for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2024 Jev Kuznetsov - ROX Automation
 #
 # SPDX-License-Identifier: Unlicense
+
+""" simple async example """
+
+import asyncio
+
+
+async def loop(id: int, delay: float = 0.1):
+    """print (i+1) dots"""
+    for i in range(5):
+        print(f"loop {id} : " + (i + 1) * ".")
+        await asyncio.sleep(delay)
+    print(f"loop {id} : done")
+
+
+async def main():
+    coros = [loop(1), loop(2, 0.5), loop(3, 1.0)]
+    await asyncio.gather(*coros)
+
+
+asyncio.run(main())