Hello
Greetings of the day!!
I have seen your job post, you need an app to communicate with arduino with wireless sensors, which can be done by iot things. we have to take data from sensors and have to upload data on server and then from server to app. Then from app to revert on hardware via server. For that we need server. May i know that server you will provide us or we have to manage from our side. I can do this, i had also worked on similar project.
Regards
Gaurav