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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Robin
I use Twilio for a bunch of my tech tinkering. It is a programmable SMS and Voice service. The service lets you get a phone number for $1/month and each SMS is like 0.7 cents.
Once you get an account on Twilio and create a number, you can access the service a number of ways. The easiest in this case was to just install the Node-Red Twilio node and put my account credentials in.
https://flows.nodered.org/node/node-red-node-twilio
I have the Espruino/Node-Red servers running on as Raspberry Pi Zero W which cost $10. Not including the power adapter but I have a ton of low power plugs laying around.