t6 is open-source, freely available and code released as GPL v3 licence - install your own t6 instance or use from Saas latest version here. Also, sample nodeMCU and Arduino scripts are available in t6iot Arduino library so that you can plug your own.
Fork t6 on GithubObjects (any device, sensors, chipsets, devices...) collect data from Sensors and POST them to t6 using the encrypted + signed payload.
Explore t6 documentationDo any actions you need, once facts match conditions (Email, Mqtt, webhook notification...) — rule based events.
Explore t6 documentation