
This is the most convenient USB to UART adapter I've seen for the ESP8266. It can control the RESET and GPIO0 of the ESP8266, making flashing completely automatic and painless with most flashing tools. UART is already supported by the Linux kernel shipped with Ubuntu 20.04. Nothing needs to be installed, just plug and play. For Windows 10, the drivers are loaded automatically after connecting to USB. It's cheaper and much more convenient than, for example, FTDI USB-UART. I've flashed this UART many times and never had a problem.

πΆ kuman 10pcs nRF24L01+ 2.4GHz Antenna Wireless Transceiver Module for Arduino Raspberry Pi Compatible K19
8 Review

MikroTik S+RJ10 Ethernet Transceiver
10 Review

10GBase-T SFP+ Transceivers, 10G Copper RJ-45 SFP+ CAT.6a, up to 30 meters, π Cisco SFP-10G-T-S Compatible, Ubiquiti UniFi UF-RJ45-10G Supported, Fortinet, Netgear, D-Link, Supermicro (Pack of 2)
9 Review

π‘ CM19A R.F. PC Transceiver for X10 Devices
8 Review

UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
11 Review

π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review

π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review

π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review