Web Interface (or App Interface) control with Alexa?

[OurBG]

So I have managed to create workarounds for almost all my devices (mostly through IFTTT and webhooks) or through some Tasker plugins, but this ...

My washing machine and Microwave are Candy - they use an App called Candy simply-fi that is really weird. Do you think there is a way I can somehow introduce that to Alexa? I have thought of many things but haven't achieved a solution yet...

My heating radiators are using an awful web interface based on a Raspberry Pi that I can't do anything with (not allowed to...). I am a Web Developer and I've thought of creating a simple API that logs into this website and clicks the "On/Off" or temperature sliders and connect that to Alexa via webhooks on IFTTT.

Do you have any suggestions? I am open to give more information if someone wishes to help me on that project because I've ran out of ideas

[Donny Bahama]

I haven’t done it myself but I’m told that you can use Home Assistant to setup unique links for every action. (I.e. On separate from Off.)

Home Assistant is open source, well-supported, very powerful and runs on a Raspberry Pi.

[tuicemen]

You might look at using the smartthings cloud https://graph.api.smartthings.com/
or HA-Bridge https://github.com/bwssytems/ha-bridge
no physical hub is required for either.