jankralx/emco_usbhv

EMCO USB High Voltage Power Supply Control via Python and HID driver - no external libraries required

EMCO USB_HV control module in Python with HID API

This is a Python module to control the EMCO USB_HV power module via the HID API. The module is based on the reverse engineering of the USB protocol used by the EMCO USBhv Series control software. It was tested with USB20N power module.

Installation

Install with

pip install .

Permissions

On Linux remember to set correct permissions for the USB device. You can do it by creating a udev rule. Create a file /etc/udev/rules.d/99-emco-usbhv.rules with the following content:

SUBSYSTEM=="usb", ATTR{idVendor}=="03eb", ATTR{idProduct}=="201d", MODE="0666"
SUBSYSTEM=="hidraw", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="201d", MODE="0666"

or simply run the following command:

echo 'SUBSYSTEM=="usb", ATTR{idVendor}=="03eb", ATTR{idProduct}=="201d", MODE="0666"' | sudo tee /etc/udev/rules.d/99-emco-usbhv.rules
echo 'SUBSYSTEM=="hidraw", ATTR{idVendor}=="03eb", ATTR{idProduct}=="201d", MODE="0666"' | sudo tee -a /etc/udev/rules.d/99-emco-usbhv.rules

Then reload the udev rules:

sudo udevadm control --reload-rules
sudo udevadm trigger

Note: The first line is required when hidapi < x.x.x is used (e.g. required for hidapi == 0.9.0.post3). The second line is required when hidapi >= x.x.x is used (e.g. required for hidapi == 0.14.0.post2).

Usage

See if __name__ == '__main__' block in emco_usbhv/emco_usbhv.py.

GUI Application

The module also includes a simple GUI application to control the EMCO USB_HV power module. The application is based on the tkinter library.

Run the application with the following command:

python emco_usbhv_app.py