IoT Device Design

i want to create an iot device, ec200 4g + 1 MCU, like stm32f0. input power option is 48v, so use buck converter to supply power to mcu and ec200, other than that i need one eeprom 16/32kB, 4 gpios, one bms ic for 600-800mah lipo battery as power backup, reverse voltage and tvs/esd diode protection on required nodes, PCB "F" antenna for ble with sma connector for external antenna option, for gps and 4g antenna, use smd ceramic antenna with sma option. that's it i think.

Thought for 5 sec

flux

No design changes were made because AI execution is unavailable without ACUs.

Remaining decisions before schematic capture:

Select the exact EC200 variant and regional LTE bands.
Use a BLE-capable MCU instead of STM32F0 (for example STM32WB), or add a separate BLE radio.
Define the 48 V input range and transient environment.
Design separate rails: high-current ~4 V supply for EC200 and 3.3 V for MCU/EEPROM.
Select a 1-cell LiPo charger, protection, and automatic power-path solution for the 600–800 mAh backup battery.
Confirm whether “16/32 kB EEPROM” means 16/32 kilobytes and choose I²C or SPI.
Define GPIO voltage levels, direction, current, and external connector requirements.
Select regional LTE/GNSS ceramic antennas and RF switching or 0 Ω selection between ceramic and SMA antennas.
Add input reverse-polarity, surge/TVS, ESD, SIM, USB/UART, and exposed-I/O protection.
Perform the power budget—EC200 supplies must tolerate its approximately ampere-scale transmit bursts—then capture and verify the schematic and PCB RF layout.

Choose MCU architecture

Define power architecture

Select EC200 variant

Specify GPIO requirements

Create requirements note

Files

Schematic

Layout

Preview

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