I would use something like that. I'm thinking of building a Pager with the pygo2 once it finally hits the market: https://pycom.io/product/pygo2/ https://pycom

I would use something like that. I'm thinking of building a Pager with the pygo2 once it finally hits the market: https://pycom.io/product/pygo2/ https://pycom.io/product/pygo2/ It's got LTE-M which is perfect for this, and LoRa and SigFox as backup. A year's service is about $40 Unfortunately it's not untracked like the old pagers were but in return it should do confirmations and even replies somehow. I'll have to add a beeper/vibration motor and a stronger battery perhaps but I think it'll work.