Ive found some old iphones, 3g and 3gs. I thought of using them a a display for 2 sensor values like the cpu temp and the temp inside my room. OFC the browser is horrible outdatet and cant even load the HA login page. Installing new browser versions, alternative browsers and the HA Companion are not possible. Ive tried a few ways, 2 of them open a remote via browser to a firefox inside a docker container (number one is an addon, number 2 is linuxserver/firefox and uses guacamole), the other way was writng my own website and get the values from the HA REST api. Since im not a web dev, i tried it with the basics from selfhtml and the js reference by mozilla. Cant get it to work on the iphones. Not even in IE. I tried even the grandpa routes i found with google, but no luck.
Do you know anything i could try? Like i said, im no web dev, i only know basic html and js and know how to google to fix problems on newer systems.
Since the devices are still ok, even with the battery, i dont wanna throw them away and reuse them if possible.