A LinkIt ONE board can be used to send SMS messages with a Seeed Studio LinkIt ONE using Programmable Wireless, AWS IoT, and Lambda. To start, sign in to a Twilio account and create an account with Amazon Web Services. Find or purchase an SMS-capable number and add it to the Twilio console. A programmable wireless SIM card can be purchased and activated if needed. The LinkIt ONE board is then programmed with a custom code that uses AWS IoT as a middleman to revoke certificates if a device goes missing without invalidating them on other devices. The code also includes a Twilio message handling callback that handles incoming messages from AWS IoT. A new Lambda function is created to handle these messages, and environmental variables are set for the Twilio account. Finally, the LinkIt ONE board can be used to send SMSes by publishing to an MQTT topic through AWS IoT and triggering a Lambda function.