PJ - thanks for the reply. I have the latest Arduino IDE installed and can find my way around it. I have managed to load sketches into my boards OK.
I do not want to use a smart phone at all. I am ols school and like knobs and buttons. If I understand I will be able to construct a little handheld box with a pot and buttons and be able to send my commands via Bluetooth to an XIAO ESP32S3 setup as a receiver?
Also wondering about being able to control different receivers from the one transmitter.
I am Windows 10
Alan