@Gordon another adapter board that might be worth making/modifying is an Arduino adapter board with a spot to solder on an esp8266. I've been using the Arduino adapter board with success, but I'm not sure if it's possible to solder down a pico with the esp8266 adapter already soldered onto the pico.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon another adapter board that might be worth making/modifying is an Arduino adapter board with a spot to solder on an esp8266. I've been using the Arduino adapter board with success, but I'm not sure if it's possible to solder down a pico with the esp8266 adapter already soldered onto the pico.