Control Lights and Read Inputs for CAN Devices

This project contains a custom Python library designed for interacting with CAN devices via a serial connection, mainly designed to be a POC(Proof Of Concept) in the topic:

• control_lights.py: Sends commands to control connected CAN device.
• read_inputs.py: Reads and parses input states from a CAN device.
• visualize_floorplan.py: Visualizes a home with smart devices.
• temperature_controller.py: An example file for Node-RED https communication, used to send a random temperature value to a custom HTTP end-point.

As a proof of concept project, the scripts currently uses hard coded default values for BIT and BAUD-RATE settings, also using the COM3 port.

• Bits per second: 115200
• Baud-Rate: 125k

Features

• Send CAN messages to control devices.
• Parse and display input states received from the CAN device.
• View the state of connected devices using a matplotlib visualization
• Flexible and customizable for different CAN setups.

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Installation

• Navigate to the root folder of the project using your preferred terminal
• Install requirements using pip install -r requirements.txt
• Install the library using pip install . (the . is part of the command too)

Prerequisites

• Python 3.6 or later with pip
• Hardware to communicate with, my setup insisted of a CANUSB device, a CANopen GCAN4032 with two switches as input dummies and a power supply.

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Using of the library

After installation, the following commands can be executed from your preferred terminal:

Commands:

1. control_devices arg:command Use this command to control connected devices. Example: control_devices t20220000
2. read_data Reads the DI states on the GCAN device
3. visualize_floorplan Using the read_data commmand, visualizes the input states using a dummy matplotlib home visualization.
4. set_temp Sends a dummy value for Node-RED https communication, used to send a random temperature value to a custom HTTP end-point.