The easiests way

HI,

I already have a couple of arduino’s, a piccolino and a raspberry pi3 gathering temperature(humidity, barametric data etc) data, which is currently stored on each device’s SD card, and accessible via http interfaces as all devices are either on WIFI or LAN. given that i can modify these devices, I’d love for them to push the data direct to hasos/home assistant, but there seems to be so many different ways, many which seem to be overly complex.

What do people advise?

Cheers,
Rob

Easiest way is to use mqtt. Mqtt is the lingua franca for home automation.