A cellular connected portable fax machine was built using a Raspberry Pi, thermal printer, and Twilio services. The project requires a Twilio account, Programmable Fax service, LTE USB modem, and other hardware components. The software uses Node.js, Vue.js, and Twilio Sync to manage faxes and send them to the printer. The process involves setting up the Raspberry Pi, connecting the thermal printer, configuring Twilio services, hosting the backend, and running the fax client software using Node.js. Once set up, users can send faxes to the printer via the Faxes API and receive updates in the web dashboard. The project is a fun example of IoT development and can be expanded upon with additional features such as camera integration for taking photos and sending them out to another fax machine.