2.4G Active Smart Student ID Card Solution
In early 2024, China’s Ministry of Education issued guidelines restricting student mobile phones on campus and encouraging schools to provide alternative communication methods — such as 2.4G active electronic student ID cards — to meet parent–student contact needs while maintaining classroom focus.
Solution Overview
The system consists of:
Student Card (powered by SI24R2E 2.4G active tag)
2.4G Reader + Antenna (gate-mounted)
Smart Terminal (data gateway)
When a student wearing the card passes through designated school gate zones (A→B or B→A), real-time arrival/departure data is instantly sent via 2.4G → 485 → GSM/broadband/SMS to parents, teachers, and the campus management platform.
Key Advantages
Home Arrival Reminder – Auto-detects when student reaches home; alerts if late
Danger Zone Alert – Warns guardians if student lingers near reservoirs, mountains, etc.
Police Missing-Person Support – One-click city-wide search using base stations and police PDAs
In-School Analytics – Auto attendance, interest tracking, intelligent departure detection
Chip Selection: SI24R2E Highlights
2.45 GHz ISM band
128-byte programmable NVM
Ultra-low-power auto-transmit mode
Low-battery & tamper alarm
Built-in anti-collision protocol
Shutdown: 700 nA | Standby: 15 µA | Startup ≤130 µs
Supply: 1.9–3.6 V (I/O up to 5.25 V)
Data rates: 250 kbps / 1 Mbps / 2 Mbps
TX power up to +7 dBm (13.5 mA @ 0 dBm, 2 Mbps)
QFN20 package, compatible with Si24R1/Si24R2
Typical Applications
Ultra-low-power active RFID
Smart campus card systems
E-bike anti-theft
Asset tracking
Smart parking management
A safe, reliable, and regulation-compliant alternative to student phones — enabling real-time two-way peace of mind for parents and schools.
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