
ESP-12S is very well known in the Arduino world. It's basically an ESP8266 configured to work with WiFi. Those pins sticking out of the board are for the serial bus, and you communicate with it using "AT" commands. There's nothing new or surprising about it. I think these special ones are a bit pricey. Many people have switched to the slightly more functional ESP-32S. If you can get an ESP-32 for the same price, that's the way to go. In terms of quality and everything else, it lives up to expectations. Hobby class, not aerospace class.

📡 Izokee ESP-01 Serial WiFi Transceiver Module with USB Converter, Compatible with Arduino
8 Review

MikroTik S+RJ10 Ethernet Transceiver
10 Review

📡 CM19A R.F. PC Transceiver for X10 Devices
8 Review

TRENDnet TC-TP1 Network Signal Testing Probe with Adjustable Volume, Speaker and Compatibility for TC-NT2
8 Review

🔌 Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
11 Review

HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 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

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