![]() ![]() ![]() The FTDI example sketch required very few changes to get the UNO and shield to work as a USB host to serial bridge. The Uno is using a sketch modified from the FTDI example provided by the USB Host Shield 2.0 library. This library supports the MAX3421E USB host controller located on the USB Host Shield. The proof of concept version uses an Arduino Uno, USB Host Shield (generic) and an ESP8266 (ESP-01S) with a level shifter. For the experience, I plan to iterate multiple versions and eventually design a custom PCB and 3D printed case. This should be an easy project to get working, all of the necessary hardware and software components appear to already exist. To interface with the FT232, this project will require USB host functionality, either from a dedicated chip or a microcontroller with that feature built in. But I don't want to modify my printer, I'd rather use the provided mini USB port to access the serial lines. The mainboard has a Crealit圓D V1.1.3 mainboard which uses an FTDI FT232RL serial to USB bridge chip. The easiest method to accomplish this task would be to tap into the Tx and Rx lines of the mainboard and hook them up to an ESP8266. A common suggestion is to use Octoprint, but that is overkill for me, I just want the serial connection. It's not something I need often, but it would be a bit more convenient than plugging in a computer directly. This project started from a desire to have a wireless serial connection to my 3D printer. ![]()
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