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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