ioSender is the host software created by the GrblHal author himself.
You can download this software from the project’s GitHub releases page:
https://github.com/terjeio/ioSender/releases
After extracting, click ioSender.exe to run.
If this is the first time running on your computer, you will be asked to select a serial port. Click on the serial port, then select your control board’s port from the list, and click OK.
Below is the screen after successful connection:
