Prerequisites

Mandatory

• NodeJS v12+ installed (earlier versions may work but weren't tested)
• GSM Modem connected to serialport (it may be a virtual com port, instead of the old RS232, you know... 😁)

(PS: You may check supported environments here)

Optional

• Typescript v3+ (earlier versions may work but weren't tested)
• VSCode

(Typescript + VSCode will help you understand and implement the Modem.js library more easily)