NDA

Budget: 68800 UAH Deadline: 20 days

This task can be simplified and implemented at a small cost. I offer you a Bluetooth device with 20 switching outputs without feedback that will work on any platform (with any device: PC, smartphone and even Smart TV) using standard drivers.
So, you will have low-cost Bluetooth device with 20 triggered lines without feedback.
If the customer agrees to some simplifications (in the TZ, by the way, is not indicated the need to display the status of each device), then I can implement it.
A full-fledged system with feedback and drivers under different platforms will be really expensive and will need upgrades in the future. So other freelancers are even more divine to you.

Budget: 68800 UAH Deadline: 24 days

Hello,
I have vast experience in engineering and firmware programming, and I have my vision of how to design and implement it quickly, expandable, and usable.
Feel free to contact me in direct messages to specify any details, waiting for your reply.

Budget: 25000 UAH Deadline: 30 days

Good day . Finally completed the project on the management of household devices by BLE. If you do only the described functional then the ready fee ESP 32 DEV KIT plus the fee for connecting devices will be sufficient. The final budget of the TZ

Budget: 68800 UAH Deadline: 60 days

If the key task includes the device's prototyping - 4K USD task budget