Use uart-gateway to connect my device to cloud

Hello All.

I want to use a small ESP32 module to connect my device to cloud. I research some time. Find use uart-gateway is the easy way to do it. I check the Mongoose OS 's uart-gateway but it looks can not use now.
https://mongoose-os.com/docs/uart-gateway/intro.md

Anyone can give some advice ?
Thanks a lot.

What exactly step fails for you?
Also, could you give details about the target cloud you want to connect to - is it a plain TCP, a Websocket, or MQTT server?

I can’t use uart-gateway , as it ask for license, but no uart-gateway license to purchase.