The ESP version of uLisp has traditionally supported the ESP8266, as well as the different variants of the ESP32.
Is anyone still interested in the ESP8266? I’m currently working on a new release of uLisp, and it would be possible to tidy up the ESP32 version quite a bit if I could remove support for the ESP8266.
Of course releases 4.4 and earlier would still continue to work on the ESP8266.