Hello there, I accept this project and will design an IoT board to replace the Particle B524, ensuring compatibility with 1NCE, OTA updates, and MQTT data transmission. The work includes hardware selection, schematic and PCB design, firmware development, prototyping, and testing. Comprehensive documentation will be provided. Looking forward to collaborating!

🔴UPDATE
Block diagram:
Google Drive

Hello Yuriy,
I have seen your project and I think I can do your project.

Let's discuss the project details together:
🟢Firstly, I need to know about the sensors you need.
… 🟢Also, also what about end server, we will need mosquito mqtt running on server and a panel to log mqtt data to database.
🟢I created a visual block diagram of my understanding of the existing project (i.e. power supply, communication module)
🟢can you tell me what are the final deliverables, like firmware only or the PCB design and all, you have mentioned the pcb design in description but have not defined what are the other things you need in the pcb. that's why confused a bit.
🟢What is the project timespan that you intend?
🟢Do you need the PCB printed and assembled or printed only?
🟢Will you supply me with the schematics of the project?
🟢Finally, please send me a video of your existing project.