Monitoring device for isolated work | Sponsored by JLCPCB

This project is sponsored by JLCPCB, and will be used by workers when they are carrying out activities in hazardous environments, to prevent any serious accident from occurring.

This project is the final activity for completing the electrical engineering course I am taking.

The idea came up in the "Health and safety at work" classes where we were presented with some situations in which some people ended up dying because they were unaware of the dangers that existed in the places they were entering, or that ended up entering dangerous places to help a co-worker, who in many situations was already dead from inhaling toxic gases.

Details

For this purpose, equipment will be attached to the worker's body, which will read the blood oxygen level, heart rate and body acceleration.
The collected data is sent to the station so that it can inform supervisors of the worker's current status and issue an alert if something goes wrong.

I chose to use low cost (not necessarily bad) sensors so that the total cost is not too great. The ESP32 being relatively inexpensive, having a good balance between performance and power consumption, and already having built-in Wi-Fi and Bluetooth made it the perfect choice for this project!
To display all information on the station, a 4.3” UART display has become the perfect choice, as it is extremely easy to program and much tougher than other displays available on the market today.

• The features of this display are:
• Resolution of 480x272 pixels
• 4.3" Size
• RS232 TTL/CMOS bus
• 5V power supply
• Resistive touchscreen panel (although not the best technology on the market, I was surprised by the touch panel's sensitivity and response)
• buzzer
• RTC
• 128MB flash memory

What led me to choose this display was the fact that I could find it here in Brazil through

Victor Vision, which in addition to offering excellent product documentation, has its excellent support service and after-sales service.