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

Very good product

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.

Needs drivers, find them by Googling for the following:"cp2101 usb to uart bridge controller driver windows 10 site:silabs.com"Download from the first link and extract the zip. The drivers will be in the extracted folder.

I have been trying for 2 weeks to upload sketches to various Wemos boards, I thought I was doing something wrong until I found out there was a known issue with the drivers. I ordered this serial converter as a last chance solution, ordered it yesterday, it came today and it was recognised immediately by my 2013 Macbook Pro. I can't say if it was something I did previously but it just works, even though I can't get any other solution to work. I can't recommend this enough especially at this price. Give it a try, it may be the answer to the cp21** mac driver issue. Also DSD Tech offer 12 months warranty and LIFETIME support.

The converter is well made and works fine but the CP2102 chip it uses only goes up to 1Mbit/s. This makes it unsuitable for use with a Pine Rock64 SBC which runs at 1.5Mbit/s. I believe the chip needed for that speed is either a CP2102N (the N is important!) or a CP2104. If like me you need the faster speed you can find a 2104-based converter here on Amazon. I haven't tried it yet but it is spec'ed to operate up to 2Mbit/s.

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.