I could't test my Automation

Hi,I follow the Documentation(https://smartthings.developer.samsung.com/docs/getting-started/automation.html) to test my Automation.Everything went smoothly at first, but when I was added automation in SmartThings app,it shows “None available”.I am sorry that my English is very poor, I hope to get a reply as soon as possible.

What kind of RGBW bulb do you have connected to SmartThings?

I don’t have any RGBW bulb connected to SmartThings.I use my own cloud server to connect to the smartthings cloud server via web hook. Can I simulate connecting a RGBW bulb through the rest api interface?

You can add a simulated RGBW bulb to your location via the old web ide at https://account.smartthings.com

Thank you very much.If I want to add third-party integrations that work with SmartThings,Is Smartthings Hub necessary?

Hub is only necessary for zigbee, zwave or lan devices. Cloue-to-cloud and direct to cloud devices don’t require a hub.

Thank you very much.I want to add our company’s devices to smartthings by cloue-to-cloud and I can’t find my device in https://graph-na04-useast2.api.smartthings.com/device/create,But it shows in smartthings app.

You add your test device via the mobile app I believe. It may be best to reach out to Developer support and ask them.

Thank you.