Dear Developers!
Unfortunately, I found that the Meraki Cellular Gateway is not capable of sending Event SMS. The SIM card can send SMS, but it is not possible on any interface (HTTP or dedicated TCP port). Do you have information on how to initiate AT commands on the device? In the API library, I only see a provider response (at&t) at the query level. It is possible to request an improvement from you, which could send out error messages via SMS with curl or any API capable app.
Thank you for your help
Tom