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EPI – GPS TRACKING OPENMCU

In this article, EPI brings readers a new solution for 2G/4G cruise monitoring devices without using an external MCU called “EPI – openTracker”.

Benefits:

  • Provides newest solution for 2G/4G GPS tracking device
  • Offers Schematic, BOM list
  • Provides documents, tutorials, demo and enthusiastic support from sales/FAE team

Features:

  • Main: module SIMCom combo CAT1+GNSS, support embedded RTOS, external MCU is unecessary.
  • Ultra-low power accelerometer sensor with I2C interface.
  • Provides RS232 connector, easy to communicate with external sensors.
  • 64Mbit NOR Flash allows to store trip and device settings.
  • RFID tag reader ISO15693 13.56MHz
  • Buck converter 45V, 2.5A

 

 

 

Detailed Features and Schematic:

Cellular + GNSS A7672S_FASE SIMCom

  • Single Processor ARM Cortex R5, CPU frequency 624MHz, embedded RTOS.
  • PSRAM: 1.6MByte – DRAM Core + SRAM interface
  • NOR FLASH: 16Mbyte
  • 2 UART, 1 SPI, 1 I2C, 33 GPIO, 1 Analog audio, 1 channel 9bit ADC
  • Dual SIM Card, 1 IMEI, support hot switch
  • Category: CAT1 – 2G 900/1800MHz, 4G band 1, 3, 5, 8, 20
  • Support GNSS, Bluetooth 5.0
  • SPI camera interface 0.3MP pixel encoding
  • SPI LCD interface

Simcard Holder:

  • User can choose Nano Simcard or eSIM
  • eSIM is an embedded SIM, contains Mobile network operator profiles.

LED indication

Bus Switch TC7MPB9307FK Toshiba

  • Shift level 8 channels
  • VCCA: 1.65-5V
  • VCCB: 2.3-5.5V
  • Small package: VSSOP20

RS232 Transceiver

  • UT3222 3.0-5.5V
  • Two channels of RS232

Accelerometer:

  • Ultra-low power accelerometer sensor, I2C interface
  • Pin-to-Pin Kionix

EXTERNAL NOR FLASH ESMT

  • EN25QH64A-104HIP 8SOP 200mil 3.3V
  • 64Mbit NOR Flash allows to store trip and device settings.

SWITCHING REGULATOR IC

  • Maximum input voltage: 45V, output current: 2.5A
  • Switching frequency up to 2.4MHz, allows to reduce inductor size

LDO 3.3V Toshiba

  • Ultra-low quiescent current TCR3UF33A,LM
  • Output 3.3V, 300mA

RFID tag reader ISO15693 Holtek

  • BC45B4523 support tag ISO15693
  • Comparasion table between BC45B4523 and CR95HF:

BOM LIST

Description Comment Footprint Qty Mfr Mpn
LOW POWER MULTICHANNEL RS-232 LINE TRANSCEIVERS TSSOP20 UT3222 TSSOP20 1 UTC UT3222
Ultra low quiescent current, Fast Load Transient 300 mA CMOS Low Dropout Regulator TCR3UF33A SOT-25-5 1 Toshiba TCR3UF33A,LM
IC BUS SWITCH 8 X 1:1 20VSSOP TC7MPB9307FK VSSOP20 1 Toshiba TC7MPB9307FK
Inductor SWPA6028S4R7MT 6x6x2.8mm SWPA6028S4R7MT IND-SWPA6028S 1 Sunlord SWPA6028S4R7MT
E-SIM DFN8 5x6mm eSIM WDFN8 5×6 1 Valid S3FW9FJM
2.4MHz, 2.5A MOSFET Switching Regulator IC for Buck Converter NJW4171 HSOP8 1 NJR NJW4171
Nano Sim card Socket SimSocket MUP-C7801 1 MUP MUP-C7801-2
Low power Accelerometer X, Y, Z Axis ±2g, 4g, 8g, 12g, 16g, 12-LGA (2×2) MC3416 12-VFLGA 1 Memsic MC3416
FIXED IND 470NH 1.4A 87.5 MOHM 470nH INDC-1206 (3216) 2 Murata LQM31PNR47M00L
NOR FLASH 64MBit Flash SOP8-200MIL 1 ESMT EN25QH64A-104HIP
NFC Reader BC45B4523 QFN-24 1 Holtek BC45B4523
LTE CAT 1 module, 2G/4G + GNSS A7672_openMCU A7672 1 SIMCom A7672S_FASE
Switch SWITCH SWITCH2_SMD 2 * *
Capacitor 10uF 50V 1206 10uF/50V CAPC-1206 (3216) 1 * *
Capacitor 1nF 0603 1nF CAPC-0603 (1608) 1 * *
Capacitor 1uF 0603 1uF CAPC-0603 (1608) 5 * *
Capacitor Aluminum 100uF/10V 6534 100uF/10V CAP_ALUM_6354 2 * *
Capacitor 9pF 0603 9pF CAPC-0603 (1608) 1 * *
Capacitor 0.1uF 0603 0.1uF CAPC-0603 (1608) 12 * *
Option, Capacitor (NC) CAPC-0603 (1608) 5 * *
Capacitor 22pF 0603 22pF CAPC-0603 (1608) 3 * *
Capacitor 18pF 18pF CAPC-0603 (1608) 2 * *
Tune Capacitor Cap CAPC-0603 (1608) 9 * *
Micro usb type B Micro USB MICRO-USB-B 1 * *
3A/100V 3A/100V SMA-DO214AC 1 * *
LED SMD LED LED_SMD_0603_RED 5 * *
Jac DC input Jac DC JackDC 1 * *
CONN UMC RCPT STR 50 OHM SMD IPEX IPEX 2 * *
9 Position D-Sub Receptacle, Female Sockets Connector D-SUB9 D-SUB9 1 * *
WR-PHD 2.54 mm Angled Socket Header JP4 JP4 1 * *
Inductor 68nH 0603 68nH INDC-0603 (1608) 1 * *
FERRITE BEAD 23 OHM 0603 1LN 23R/4A INDC-0603 (1608) 2 * *
PDTC123 PDTC123 SOT23B 2 * *
NPN Trans NPN SOT23B 2 * *
Resistor 10k 0603 10k RESC-0603 16 * *
Resistor 6.8k 0603 6.8k RESC-0603 1 * *
Resistor 487k 0603 487k RESC-0603 1 * *
Resistor 120k 0603 120k RESC-0603 1 * *
Res 10R 0603 180R RESC-0603 1 * *
Option (0R) RESC-0603 10 * *
Resistor 1k 0603 1k RESC-0603 4 * *
Resistor 22R 0603 22R RESC-0603 3 * *
Resistor 4.7k 0603 4.7k RESC-0603 5 * *
Resistor 470R 0603 470R RESC-0603 1 * *
Resistor 3.3k 0603 3.3k RESC-0603 1 * *
RESA-AS 1206 1R 1% 250MW TC400 1R RESC-1206 (3216) 2 * *
Crystal Oscillator 27.12MHz XTAL_EPSON_TSX-3225 1 * *

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