This is an Internet Button reference project: when a button on the device is pressed, a cloud backend gets a notification and performs an action. In this particular case, AWS Lambda function sends an email to the specific email address. But, again, the action could be anything.
Description: Send email on a button press
Video duration: 3 min 44 sec
Hardware: ESP8266 NodeMCU
Software: Mongoose OS https://mongoose-os.com AWS services: AWS IoT, AWS Lambda, AWS SNS, AWS CloudFormation