The Arduino MKR GSM 1400 is a development board that combines global GSM connectivity with the functionality of the Arduino Zero, making it an ideal solution for IoT prototyping. The board integrates a modem with a microcontroller, enabling Machine-to-Machine (M2M) communication using Twilio Programmable Wireless SIMs. This tutorial demonstrates how to send M2M Commands from the Arduino MKR GSM 1400 to a server written in Go, which plays an audio file saying "hello" when the command is received. The project requires the installation of the MKRGSM library and the Arduino SAMD Boards cores, as well as setting up the Twilio SIM and creating a server using Go and Beep libraries. ngrok is used to bridge the gap between the hardware and software pieces, allowing the M2M Command to be routed from the Twilio SIM to the server running on the machine. The project showcases the potential of the Arduino MKR GSM 1400 for IoT prototyping and provides a foundation for building more complex projects.