# Sentera Camera

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This page includes troubleshooting for the following Sentera cameras:

* Sentera Single
* Sentera Double 4K (D4K)
* [Sentera 6X](https://sentera.gitbook.io/6x-multispectral-sensor-user-guide)
* [Sentera 65R](https://sentera.gitbook.io/65r-sensor-user-guide)

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{% hint style="success" %}
Always wait for the green light to appear before you attempt to takeoff.
{% endhint %}

* Always wait for the camera to turn green and have a [GPS connection](https://support.senterasensors.com/home/fieldagent-mobile-ios/faqs#do-sentera-cameras-need-gps-to-take-photos).
* Check the [SD Cards](https://support.senterasensors.com/home/fieldagent-mobile-ios/requirements/sd-cards) section of the guide.
* If your camera has a lens cover then it must be removed before flight.
* Check that the SD card has space and is not write-locked.
* You need to slow down your flight plan so that you do not exceed the hardware's maximum capture rate. Slower flights allow longer times between photo capture intervals.

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If you are using the app to execute the mission, then keep FieldAgent Mobile in the [foreground](https://support.senterasensors.com/home/fieldagent-mobile-ios/faqs#the-app-must-be-in-the-foreground-why). 

{% hint style="info" %}
If you are using DJI Pilot 2 on Drone's RC, the app does not need to be running.
{% endhint %}

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For more information see this [page](https://support.senterasensors.com/home/fieldagent-mobile-ios/requirements/sentera-cameras).