5V
3.3V
+5V
GND BUS
Power Section
5V Adapter /
Li-ion Battery
(3.7V)
Battery Charger
TP4056
Power
Protection
DW01A
Boost
Converter
MT3608
3.7V Li-ion Battery
B+ / B- → regulated 5V & 3.3V rails
Control Unit
TesController
Controller + AI Core
TX2
RX2
25
26
27
14
12
GND
Communication Module
VCC
GND
SIM7600E-H
TXD
(4G / 5G / GSM / GNSS)
ANT
RXD
PWRKEY
RST
GPS ANTENNA
(Active)
Sensors
Microphone
INMP441
I2S
Accelerometer
KX022
I2C
Tamper Switch
NC Type
Vibration Motor
(Optional)
User Interface
Silent SOS Button
Status LED
(Hidden)
Buzzer / Siren Driver
(For local / remote)
Storage
Micro SD Card Module
Audio & Log Storage
MOSI
MISO
SCK
CS
Connection Summary
1. TesController ↔ SIM7600 (UART)
TX2 → RXD
RX2 ← TXD
2. TesController ↔ Sensors (I2C / I2S / GPIO)
Mic → I2S
Accel → I2C
Tamper → GPIO
3. TesController ↔ SD Card (SPI)
MOSI, MISO, SCK, CS
4. SOS Button → GPIO
5. Driver → Transistor → Siren
6. Power → 3.7V Battery → Boost 5V / 3.3V
Power
Data
Storage
UI / Alert
Optional Relay