DSD TECH USB to TTL Serial Converter CP2102 with 4 Pin Dupont Cable Compatible with Windows 7, 8, 10, Linux and Mac OS

does the job!

Fast delivery, great price.This is what you need to have a serial console to your Raspberry Pi4 running Raspbian (which saves you from attaching a monitor and keyboard when you can't access the RPI over SSH):1. connect the wires to the GPIO like on the attached picture, no power necessary!USB to TTL-GND -> PI GNDUSB to TTL-TX -> PI RXUSB to TTL-RX -> PI TX2. enable uart in /boot/config.txtenable_uart=13. redirect kernel messages to serial: raspi-config > 5. Interfacing Options > P6 Serial Enable/Disable shell and kernel messages on the serial connection4. reboot Raspberry5. attach USB to TTL Serial Converter to your Mac (or PC)6. download driver from silabs (usb-to-uart-bridge-vcp-drivers)7. attach to the serial console with screen (on Mac/Linux, use putty on Windows):$ screen /dev/cu.SLAB_USBtoUART 115200Done, you'll see *all* boot messages and will get a login prompt once the boot of Raspbian finishes.

Came with jumpers so I was able to connect to target easily. Windows detected and installed the USB to serial driver without a hitch and added COM18 to the device list. It reconnects to the same port every time I plug it into the USB port so no fishing around finding which Com port it is associated with. Done a lot of program downloads without any buffering errors. Good value for money.

Really awesome product, easy to use just plug everything in and you're off. You need to install the driver but instructions are provided and again its simple just a few clicks

I had had some occasional uploading problems, when used a FTDI based converter, for Arduino Sketches. With this CPP2102 based device, I was able to upload from the Arduino IDE to devices that had no built-in USB to TTL convertor, and also to naked chips, without any issues. Be aware that this unit only has Rx and Tx signals and the supply (3.3V or 5V). This means having to fudge a reset signal.

Hey you, Atari ST user! Are you wondering why your acsi2stm for blue pill is spitting gibberish into your serial monitor when connected to this device?It's because the debug builds of acsi2stm default to a 2Mbit serial rate whereas this device is limited to 1MBit serial transmission only. This is mentioned only on page 3 of the instruction manual...You'll need to download and configure the arduino ide to rebuild acsi2stm from source with a serial speed of a much lower value (e.g. 115200) in order to see output in your serial monitor.

Used to flash my Sonoff Bridge, very simple to use, and this model comes with protective case, unlike many others. Recommended.

A very neat adapter. Case is a bit wide to fit next to other devices when plugged into a hub, but having a case is preferable to a bare board. Only used at 115200 baud so far and no issues encountered. Just plug and go.