You can implement custom notificator. Here is an example:
Am I right in thinking this will only work on android devices as a client needs installing on each device?
JD
I think you are missing the point. It's just an example on how to implement a custom class to do anything you want. You can use some REST API to send SMS there.
Is it possible to maybe think about sending SMS from within traccar maybe using a curl command like I use for my UPS info messages via someone like Zensend.io, they can accept PHP, C#, Ruby, Java, Python, Node JS command line stuff? Non of my SMS accounts do SMPP, is it an old protocol? My other site has a REST API