Hello everyone,
I’ve been working on a PCB design for my project, and I would appreciate any feedback or recommendations you can offer. The design includes:
- ESP32-C3 for control and communication
- SIM808 module for GPS and GPRS with SIM card support
- MLX90614 for temperature measurement
- MPU-9250 accelerometer
- APDS-9960 proximity sensor
- Power management using TP4056 for LiPo battery charging and switching between external power and battery
I’ve attached the schematic and PCB layout below. I am particularly interested in feedback on:
- Power supply stability, especially for the SIM808, as I’ve included components for USB/battery power switching.
- Any suggestions to optimize power consumption (using ESP32 deep sleep, etc.).
- Ensuring proper communication via I2C between the ESP32-C3 and the sensors (pull-up resistor values, etc.).
- Antenna placement and routing for SIM808 (GSM and GPS antennas).
Looking forward to your insights!
Thanks in advance for your help.
