Use an Arduino MKR GSM 1400 and a Blynk app to control the two relays of the MKR Relay Proto Shield.

How to set up a MKR GSM 1400 and publish an event or location to Wia.

A guide for the Hologram.io Arduino MKR 1400 GSM workshop for IoTDevFest PHX 2019.

Drive the relays of the MKR Relay Shield connected to a MKR GSM 1400 with an SMS.

Use Arduino CLI tools to code, compile and upload programms to your Arduino Board. Follow this tutorial for getting started with arduino-cli

Get the position of your MKR GSM 1400 on your smartphone through an SMS with a Google Maps link.