"Hello!
I've looked through your task and I think I can do it. I have a wide experience with developing both back-end and front-end side for web and IoT solution. Besides I have released many projects using Arduino and Raspberry and their sensors. If you need connect your devices by air I can help you to do it using LoRa technology or WiFi.
Now I'm absolutely free and I can devote myself to your application. Will be glad to fulfill your task and I'm looking forward to our cooperation."