What do you do once you need two computer systems to speak to one another instantly, with none networking {hardware} in-between? Prior to now, you might need used a null modem cable or an Ethernet crossover cable — each simply swap the obtain and transmit alerts to permit direct communication. However your pc in the present day may not even have an Ethernet port and it positively doesn’t have a serial port. That’s why Clem Mayer invented this USB Looper, aka “Blooper,” for the fashionable period.
Blooper serves a goal much like these previous null modem cables. It lets two computer systems speak to one another with out involving a community. That’s useful for headless management, transferring recordsdata, and extra. It could possibly additionally log serial output and even let a pc speak to itself by looping again serial knowledge to a different USB port (therefore the title), which will be helpful when debugging or testing performance.
As you might have guessed, that’s doable as a result of Blooper isn’t only a “dumb” set of wires, like a null modem cable or an Ethernet crossover cable. It’s really a really compact machine with a USB-C port on every finish. Plug in cables and join them to 2 computer systems (or a single pc), then begin speaking. The pc sees a USB serial machine, so normal serial utilities will work simply effective.
All of that’s doable as a result of the small Blooper PCB, custom-designed by Mayer, incorporates two FTDI FT230XS chips. The remainder of the {hardware} is simply resistors, LEDs, the USB-C ports, and diodes to forestall reverse-powering — you don’t need one pc’s USB port making an attempt to offer energy to the opposite pc’s USB port.
You must have the ability to use Blooper in some ways with none particular software program. However Mayer does present Python scripts to assist. One instance is for datalogging, one other is for full-duplex chat, and one other is for transferring recordsdata.
Put all of it collectively and Blooper is a genuinely great tool to have at your disposal, which you’ll be able to construct with about $10 value of parts.