OpenSprinkler › Forums › OpenSprinkler Mobile and Web App › How do I secure my access to opensprinkler over the Internet? › Reply To: How do I secure my access to opensprinkler over the Internet? July 14, 2023 at 3:31 pm #76445 RayKeymaster Do you have an OpenSprinkler 3.x? (i.e. 3.0 3.1 or 3.2)? If so, you can upgrade your firmware to 2.2.0(2) and use OTC token. It goes through the secure server https://cloud.openthings.io for remote access.