Review on 💻 HiLetgo 5pcs USB to Serial USB to TTL CH340 Module: STC Microcontroller Download Adapter Bundle by David Sanchez

These are by far my favorite USB/TTL devices. First, there is a jumper that allows you to choose between +3.3 or +5V. Another interesting feature is that they use the CH340 chip. I found it significantly more reliable on Windows than another widely used chip, the SiLabs CP201x. The problem with CP201x chips is related to Windows - so often after applying Windows updates, drivers are replaced with default values, which causes them to stop working until the appropriate drivers are manually reinstalled from the manufacturer's website. This does not apply to those using the CH340. They just always seem to work. (Of course, that's not a problem for Linux) I also like the fact that these devices have transparent heat shrink tubing, which protects these devices (and your computer!) from stray cables or other things that inevitably fall on them during development and prototyping. added bonus, MF jumper included; ideal for connecting to a breadboard (but note that you'll need the FF jumpers if you're connecting directly to something like a Raspberry Pi). This allows for instant verification of the work using something like Putty to confirm working with a COM loop.