A story of stretching, checking files, and getting ready for the day
Every time an IoT device powers on, it follows a morning routine: boot up the tiny OS, discover profiles, select the manager, activate the translator, check the contact list, and connect to the network. Six steps: all happening in milliseconds!
The eSIM chip has a tiny filing cabinet of important files: the directory of apps, the chip's serial number, its unique 32-digit EID, and: new for IoT: the contact list (EIMCFG) and pending notifications (NOTIF). Everything the chip needs to know, neatly organized!
During boot, the chip asks: "Do I have a Fallback Profile?" If no normal profile works, the chip automatically switches to this emergency backup: usually a basic one from the manufacturer with just enough connectivity to call for help. Like checking your parachute before jumping!
Once connected, the device sends a DeviceInfo card to the control centre: "Here's my model, I'm an IPAe, I speak HTTPS and CoAP, and here's what I can do!" The control centre uses this to customize its communication: gentle, lightweight messages for tiny sensors, richer commands for powerful gateways.
The eSIM chip's unique ID (the EID) is 32 digits long. That's enough numbers to give a unique identifier to every single grain of sand on planet Earth… many times over!
Learn the magic of controlling SIM profiles from across the world!
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