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By Inq720
#94111 ... or replace with any of the ESP boards if you want WiFi and/or Bluetooth functionality.

Seem pretty popular...
"Even with the launch of the ESP32 a few years ago, the demand for ESP8266 has not abated, with so far, the sales volume in 2021 exceeding 30 million units with the ESP-01S/ ESP-07/ESP-12F/ESP-12S being the most popular ESP8266 modules."