This multi-platform Python tool connects USB gateway to the MQTT. USB gateway is communicating over virtual USB serial port with JSONs.

Gateway can be run in command line or by pm2 service manager.

Install & Upgrade

sudo pip3 install --upgrade --no-cache-dir bcg

Usage examples

Usually the bcg is run with pm2 process manager. This direct command line command is more for testing purporses if the service does not run correctly.

Start

    bcg --device /dev/ttyUSB0

Start with debug

    bcg --device /dev/ttyUSB0 --debug

bcg --help

hub@hpnix:~$ bcg --help
usage: bcg [-h] [-c CONFIG] [-d DEVICE] [-H MQTT_HOST] [-P MQTT_PORT]
           [--no-wait] [--mqtt-username MQTT_USERNAME]
           [--mqtt-password MQTT_PASSWORD] [--mqtt-cafile MQTT_CAFILE]
           [--mqtt-certfile MQTT_CERTFILE] [--mqtt-keyfile MQTT_KEYFILE] [-D]
           [-v]
           COMMAND ...

BigClown gateway between USB serial port and MQTT broker

positional arguments:
  COMMAND
    devices             show devices
    help                show help

optional arguments:
  -h, --help            show this help message and exit
  -c CONFIG, --config CONFIG
                        path to configuration file (YAML format)
  -d DEVICE, --device DEVICE
                        device
  -H MQTT_HOST, --mqtt-host MQTT_HOST
                        MQTT host to connect to (default is localhost)
  -P MQTT_PORT, --mqtt-port MQTT_PORT
                        MQTT port to connect to (default is 1883)
  --no-wait             no wait on connect or reconnect serial port
  --mqtt-username MQTT_USERNAME
                        MQTT username
  --mqtt-password MQTT_PASSWORD
                        MQTT password
  --mqtt-cafile MQTT_CAFILE
                        MQTT cafile
  --mqtt-certfile MQTT_CERTFILE
                        MQTT certfile
  --mqtt-keyfile MQTT_KEYFILE
                        MQTT keyfile
  -D, --debug           print debug messages
  -v, --version         show program's version number and exit

Udev rules

If you would like permanent alias in /dev/, then apply these rules.

For Radio Dongle

echo 'SUBSYSTEMS=="usb", ACTION=="add", KERNEL=="ttyUSB*", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6015", ATTRS{serial}=="bc-usb-dongle*", SYMLINK+="bcUD%n", TAG+="systemd", ENV{SYSTEMD_ALIAS}="/dev/bcUD%n"'  | sudo tee --append /etc/udev/rules.d/58-bigclown-usb-dongle.rules

For Gateway with Core Module

    echo 'SUBSYSTEMS=="usb", ACTION=="add", KERNEL=="ttyACM*", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="5740", SYMLINK+="bcCM%n", TAG+="systemd", ENV{SYSTEMD_ALIAS}="/dev/bcCM%n"' | sudo tee --append /etc/udev/rules.d/59-bigclown-core-module.rules

Config files

In case you would like have configuration of bcg separate and not permanent in the pm2, create a config file and pass the file with -c parameter to bcg.

  1. Create folder for configuration file

    sudo mkdir -p /etc/bigclown
    
  2. Configuration file for Gateway Radio Dongle

    Open file

    sudo nano /etc/bigclown/bcg-ud.yml
    

    Insert this

    device: /dev/bcUD0
    name: "usb-dongle"
    mqtt:
        host: localhost
        port: 1883
    
  3. Run service for Gateway Radio Dongle

    pm2 start /usr/bin/python3 --name "bcg-ud" -- /usr/local/bin/bcg -c /etc/bigclown/bcg-ud.yml
    

    pm2 save
    
  4. Configuration file for Gateway Core module

    Open file

    sudo nano /etc/bigclown/bcg-cm.yml
    

    Insert this

    device: /dev/bcCM0
    name: "core-module"
    mqtt:
        host: localhost
        port: 1883
    
  5. Run service for Gateway Core module

    pm2 start /usr/bin/python3 --name "bcg-cm" -- /usr/local/bin/bcg -c /etc/bigclown/bcg-cm.yml
    

    pm2 save
    
  6. Bash autocomplete for bcf

    register-python-argcomplete bcf >> ~/.bashrc
    

    source ~/.bashrc
    
Chapters in this document:
Edit this page

We will inspire you!

You will get regularly our Clownsletter with real projects from other Makers. Do not miss it!

By sign up you will know how even you can inspire others and get €100 discount coupon!