> For the complete documentation index, see [llms.txt](https://docs.adti.camera/adti-61s-quick-start-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adti.camera/adti-61s-quick-start-guide/connect-the-camera-trigger.md).

# Connect the Camera Trigger

The 61S camera does not have relay trigger for the camera multi-cable.

Please note 42L does not have Relay-to-PWM module, the Factory default triggering method is PWM, unless user contact ADTi tech support service before purchasing. It is either Relay (TTL) or PWM trigger, but it can be changed from PWM to TTL by flashing the camera firmware (please read <mark style="color:orange;">\[How to Flashing ADTi camera firmware]</mark> section to see the details).

<figure><img src="https://1446498288-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYQOfsxZNYgwc0CLiVZ28%2Fuploads%2FiYgOCjPpt0eS1IuZseCl%2F459af647954be54627b784cb520717b.png?alt=media&amp;token=62e523b2-52db-4319-a84f-e760be50eb7e" alt="" width="563"><figcaption></figcaption></figure>

Please note: disconnecting the camera power supply will NOT save the new settings, use ON/OFF ON/OFF button on the touch screen OR serial port from PC or bluetooth (please see <mark style="color:orange;">\[How to use ADTi serial port]</mark> via PC solution and <mark style="color:orange;">\[How to use ADTi blue tooth]</mark> sections) to save the camera new settings .

Please check Portal [<mark style="color:red;">\[ADTI PX4 or Ardupilot Setup\]</mark>](https://docs.adti.camera/adti-camera-px4-or-ardupilot-setup/)<img src="https://1446498288-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYQOfsxZNYgwc0CLiVZ28%2Fuploads%2F9zbTZdqN9LPI5NZCqjnJ%2F1698878258332.jpg?alt=media&amp;token=51c219aa-9023-499d-aa48-c347d1286ce2" alt="" data-size="line">for triggering camera by autopilot.