Bluetooth USB Serial Terminal Adapter for 3D Printer

It's a bluetooth adapter that plugs into the USB port of the printer. It works exactly like Pronterface using a serial terminal app on a phone to control the printer. I think it would also work with any standard usb serial device that can interface with a terminal. I use the adapter to adjust settings while printing inside an enclosure.

The app I use is Serial Bluetooth Terminal for Android. It has macro buttons that you can assign m-codes to. For iOS the app is called Bluefruit Connect.

There are two micro controllers in the box. A Teensy 4.0 handles the USB connection with the printer and a Adafruit Itsybitsy nRF52840 provides bluetooth connectivity. It will also work on a Teensy 4.1. The code serial.ino is for the Teensy, and bleuart.ino is for the nRF52840. Both programmed from Arduino IDE.

The passthroughs are meant for a usb-a and micro-usb straight through-hole type connectors. The usb-a is meant to connect to the printer and the micro-usb provides power.



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