Possible features to look into

[alextrical]

Ive been intrigued by this project for the last few months and been thinking about possible modifications to its build.
The following are possible quality of life improvements:
-Run the system at 5 Volts, allowing the device to be powered over USB, and make use of ubiquitous phone chargers
-Replace the buttons with a LVGL display , something like this ESP32-S3 based display
-Add a grounding wire to the handle to make the device ESD safe, possibly an enamel coated wire (magnet wire) run through the inside of the tube up to the handle, and grounded back in the base station could work?

If the display is used:
-The foot pedal can be made wireless, using an ESP8266 and a LiPo battery. ESPNow should be a viable option to send the start/stop signal to the main unit, and still have a long battery life (even if using a coin cell)
-Add a pressure sensor, this would allow setting the pressure, rather than just the power to the pump, to be more standard across devices.
-Multiple profiles could be setup, or set per nozzle size
-Could connect to a PC over USB, WiFi or Bluetooth. USB can be used to emulate a keyboard (as per the current setup) or wireless using Bluetooth