If sending to WhatsApp, are there any other 3rd party API etc costs to enable this?
Customer is currently on 8.1.35, but I have plans on moving to 8.3 circa Q2 ‘26 to get the enhanced Siemens driver talking so some 1200 and 1500’s they have on site.
Yes, the Twilio module requires that you have a Twilio account set up, and you'll be billed whatever Twilio charges for usage whether it's SMS or WhatsApp.
Using the WebDev module or some other implementation method along with some Webhook URLs can be a good alternative. For instance, we use Microsoft Teams chat webhooks for some alerts at work.