I know it’s been a few months since this conversation, but I wanted to update you about the integration of downlink messages.
If you refer again to the downlink event settings you will see multiple options in the URL field, including a “Custom” option.
This field is for assigning the custom host provided by TTI + the region. That said, the final URL would be as follows:
https://integrations.xxxxx.thethings.industries/ttn = the custom URL
/api/v2/down/my-app-id/my-process-id?key=ttn-account-v2.secret = the information included in the other fields provided in the event.
As you mentioned TTN and TTI have a similar API, so the only change would be the custom host. Said this, there should be no problem with integration. I invite you to test it.
I will be attentive to any additional questions, or if you have any feedback they are completely welcome.