Update WiFi on Daikin BRP069A42

daikin-update-wifi.js

// If the device is already on a network and you need to change it, you can load:
//    http://<device_ip>/common/get_wifi_setting
// It'll give you a result like... ret=OK,ssid=OldSSIDHere,security=mixed,key=%6e%65%76%65%72%67%6f%6e%6e%61%67%69%76%65%79%6f%75%75%70

// To update the same data, open that page and in the console, run this (modify as needed):

const ssid = 'NewSSIDHere';
const key = 'nevergonnagiveyouup';

const encoded = Array.from(key).map((c) => '%' + c.charCodeAt(0).toString(16).padStart(2, '0')).join('');
const body = `ssid=${ssid}&security=mixed&key=${encoded}`;
const headers = new Headers();
headers.set('Content-Type', 'application/x-www-form-urlencoded');
const args = {method: 'POST', body, headers};

// nb. Commented out so you don't clobber settings

// const r = await fetch('/common/set_wifi_setting', args);
// const text = await r.text();
// console.info(text);

// Once you're done, open up http://<device_ip>/common/reboot (as a GET is fine) and the device will reboot and join the new WiFi.

Thanks for sharing. Inspired by your code, I created another gist, in Python to avoid cross domain referencing issues in the browser. Also, I found out that set_wifi_setting required a GET action rather than POST on my FTXA device.
Perhaps my recent additions to the following repository are also of your interest: https://github.com/gjdv/python-daikinapi