A fair while back I built up various shortcuts to run on Android (initially for the Ohme EV charger) Octopus, n3rgy, Solcast etc but also Givenergy (this was from back in the bad old days when we used to poke registers individually before the proper API calls existed.)
It runs as plugins on [https://http-shortcuts.rmy.ch/] which is basically a mobile version of Postman with the bonus of "before/after" calls in Javascript - so you can pretty much do whatever really....
Anyway I was reminded of it's existence a few days ago, I've dusted it off, removed the old "register" parts no longer needed and added the new Charge/Discharge rates as an example of using the new style Battery API (so you can pause your battery from the homescreen should you wish) as below:
![https://terravolt.co.uk/wp-content/uploads/2021/11/Screenshot_20211117-105042_HTTP-Shortcuts-757x1536.jpg]
You can read about it/download the plugins from here:
(https://terravolt.co.uk/api-integrations/http-shortcuts-help-faqs/)
Let me know if you get stuck but I think the setup wizards I've done should be fairly good at capturing most things. By all means modify them as you please.