Hi there, Sorry for the late reply. I have code that works well for rel-501 and I am currently working on a module so its available for others to use. Just this week I learned that because of new US Laws for 2022 we need to have a campaign and a brand in order to send messages from a 10 digit number.
I am happy to assist you. The current code in the base is out of date. If you want 2-way texting you will need more code than the community provides.
The next few days are pretty busy for me but feel free to reach out to me and I can assist you getting up and running. I should have a working module in the next two weeks, so depending on your timeline I can make it available for you. The module I am working on is pediatrician-specific since we send the same SMS alert to multiple phones.