I am trying to send an SMS in Australia from a Particle Boron 2G/3G. Any advise on to set this up that does not involve going through a US website to create a webhook? Is there existing open source library code that can easily be used for the Particle Boron to send an SMS?
You should be able to from tutorials I’ve found online. Only within the last couple years has Particle been supporting SMS from their API/s as far as I know, but reading through the Cellular docs it appears that it should now be possible to do so:
Above is another discussion on this that Particle had a while back that should be helpful for you. Please let us know if you have any further questions