Monitoring device for isolated work

A device to be used by workers when performing activities in hazardous environments. Sponsored by JLCPCB

Similar projects worth following
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.

It is common for accidents to occur in confined environments, many of these locations may contain in their atmosphere various toxic gases and low oxygen levels, in addition to other hazards.
The intention of this project is to create a product that constantly monitors various parameters, to detect when the worker is experiencing a malaise, or when he suffers some other type of accident, and then alert the supervisors so that they can trigger the rescue and so avoid a serious injury that can lead to death due to lack of medical help.

For this purpose, equipment will be attached to the worker's body, which will read various parameters, which will be explained below, and send them to the station so that it can process the information received and inform everyone nearby if the worker is not well.
Let's go to the hardware: For this equipment that will be with the worker, the following sensors will be used:

  • MAX30100, manufactured by MAXIMINTEGRATED
  • MPU6050, manufactured by INVENSENSE.TDK

These sensors are read by an ESP32 module that also communicates with the station.
These two sensors read the heart rate, the oxygen saturation in the blood and monitor the amount and speed of movement of the worker's body, to detect a possible fall.

The station has an ESP32 microcontroller, which, upon receiving information on heart rate, blood oxygen level and movement level, will make the appropriate treatment of this information and will then be displayed on a 4.3”  intelligent UART display, the data collected during all the time they will be stored in an sd card, which will allow the observation and future analysis of this data if necessary.

Adobe Portable Document Format - 794.87 kB - 03/24/2021 at 23:07


Adobe Portable Document Format - 1.56 MB - 03/24/2021 at 23:04


Adobe Portable Document Format - 810.09 kB - 03/24/2021 at 23:04


Adobe Portable Document Format - 874.83 kB - 03/24/2021 at 23:04


  • 20 × Capacitor 100nF smd 0805
  • 4 × Electrolytic capacitor 16V 10uF
  • 3 × Diode 1N4007
  • 4 × Diode 1N5402
  • 4 × 1x3 pin bar

View all 43 components

  • 1
    PCB manufacturing order

    JLCPCB is sponsoring this project, providing free printed circuit boards for this project to become real.

    JLCPCB sponsors students worldwide, providing high quality PCBs free of charge.
    For more information or to order your PCBs free of charge, visit: Student PCB sponsorship

    With your PCB design ready, it's time to request the favrication of your PCBs, so to do that go to JLCPCB and click on "QUOTE NOW"

  • 2
    Loading your GERBER file.

    Upload your GERBER file by clicking on "Add gerber file". Once loading is complete, a preview will be generated and the dimensions and number of layers of your PCB will be automatically identified.

    You can better check your PCB design by clicking on Gerber Viewer, confirm all parameters, choose the color of the solder mask and then click on "Save to cart" and then checkout.

View all instructions

Enjoy this project?



Joseph Eoff wrote 04/16/2021 at 09:57 point

Cool idea.  Using the MAX30100, you can tell that a worker is having trouble before he collapses.

The whole concept is known as "lone worker protection" in English.  I don't know the proper term in Portuguese (as you seem to be in Brazil,) but I'm sure there is an industry term for it.

I'm also sure that there are national standards that such a device has to follow.

Given the targetted use (environments with toxic gases,) I expect you will have to consider explosion proof standards as well - that is, making sure that your device won't trigger a gas explosion.

Is this more a proof of concept, or do you intend to make a real product of it?

  Are you sure? yes | no

Bruno Lopes wrote 04/19/2021 at 16:06 point

Thanks for the comment. I hadn't really thought about that term before, in a quick search I found devices that have the same purpose, but with much less functionality.

I have not yet come to design the box of the device, but I already have in mind that any spark, explosion or flame must be contained within the device. In fact, I even want to leave it waterproof, so that it can last for a few hours in water.

Here in Brazil we have a standard for this type of device, an NR6 = 6.1% 20For% 20os% 20 ends% 20de, and% 20a% 20sa% C3% BAde% 20no% 20work

And I'm working on making a real product, the first prototype is almost done.

  Are you sure? yes | no

Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates