I apologize if this was posted somewhere else but thought I'd way in. Is anybody else out there using the Boveda smart sensor to monitor their humidors? I picked up one a few weeks ago and really like it. It's a pretty good deal right now at $49.99 with that you get 4 of the larger Boveda packs and a calibration kit. You can also just get the sensor by itself for $39.99. It's Bluetooth 4 only and has a temperature, humidity, and an impact sensor if you choose to enable that. I have a cabinet humidor in the basement and I'm able to get readings from anywhere in the house. If you're a tech geek like me it's pretty neat.
https://bovedainc.com/app/
https://bovedainc.com/app/