I had been playing around with wide area CCTV systems via long range wifi links for some time when the question was raised about also controlling stuff over the same network. Whilst commercial devices did exist many did not have a user friendly interface or where mean for SCADA systems plus lacked the configurability I wanted for sensor selection
After some time hunting around for a nice arduino based solution I came across the KMP Electronics ProDINO Netboard which incorporates 4 relays, 4 opto inputs, RS485 and a onewire interface - pretty much catering for what I required in one neat package whilst having full arduino compatibility.
I soon had a serial Maxbotix Sonar and other senors hooked up and working with KMP’s example website code but it still wasnt really what i was after in terms of a UI
Thats when I discovered Cayenne (whilst i was recouperating from an operation in hospital mind you!).
As soon as I was out - I loaded up the BETA Cayenne libraries into the arduino IDE an LITERALLY minutes later had sonar readings in the dashboard and on the phone app!
I then configured triggers to send alerts via email to my Pushover account and I had a working system ready to be attached anywhere in my wide area Wifi Network!
I’m yet still to deploy it in the real world - I only started playing with Cayenne YESTERDAY!