TrollLEDs (TrollStore) Control Flashlight LEDs iOS

An iOS application called TrollStore designed to manage the LED lights of individual flashlights on iOS devices. If the device is jailbroken, it is recommended to uninstall the Amber tweak as it will be rendered ineffective by this app.

Compatible Devices

  • For this task, the device must have iOS 11 or above.
  • The iPhone or iPad must have multiple flashlight LEDs of different colors, such as amber and white.
  • Devices with only one color flashlight LED, like the iPhone 4s and iPhone 5, are not compatible.
  • Devices that belong to the iPhone 14 series or newer are not compatible, as Apple has redesigned the flashlight LEDs entirely.

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Instructions for Quad-LED Devices

The successful adjustment of Quad-LED devices can be achieved through the private API SetTorchManualParameters, which requires four parameters for White 1, White 2, Amber 1, and Amber 2 LED levels. This feature is available on modern devices, including the iPhone 11 (with two physical LEDs) and the iPad Pro 3rd generation (with four physical LEDs).

Sliders with LED lights

The application contains four sliders:

  1. LED 0 Cool – The intensity of the initial white LED
  2. LED 1 Cool – The intensity of the second white LED (if present in the device)
  3. LED 0 Warm – The intensity of the first amber LED
  4. LED 1 Warm – The intensity of the second amber LED (if available on the device)

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Each slider has the ability to be modified separately. As the value increases, the LED’s brightness will also increase. However, if the value is set to 0, the LED will not emit any light. When all sliders are set to 0, all of the LEDs will be turned off.

Devices that have four physical LEDs, like the 3rd generation iPad Pro, will achieve the highest level of brightness when all sliders are at 100%. On the other hand, devices with two physical LEDs, such as the iPhone 11, will reach maximum brightness when Cool LED 0 and Warm LED 0 are at 100%, while the rest are at 0%. The Cool LED 1 and Warm LED 1 sliders are only used as a lower brightness option for their corresponding LED 0.

Count of Physical LEDs

Although it is classified as a quad-LED device, it could potentially only have two physical LEDs. Through the use of TrollLEDs, you have the ability to manually specify the number of physical LEDs in the application. At this time, there is no efficient method to automatically determine the physical LED count.

If the specified value is Dual:

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Enabling the Quad option will result in the app shortcuts maximizing all associated sliders.

Implementation (Devices with Dual-LEDs)

Devices with dual-LEDs, like iPhone 5s and iPhone SE 1st generation, do not allow the use of the private API SetTorchManualParameters. These devices typically have two physical LEDs, one in white and one in amber, and are considered older models.

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Different from Amber tweak, this application is not capable of simultaneously turning on both LEDs. The Torch Level slider can be utilized to adjust the brightness of the LEDs, similar to the Control Center. However, the Warmth slider only determines the warmness level of the scene. Increasing the value will result in a higher brightness for the amber LED, producing a warmer light. When Warmth is set to its maximum, only the amber LED will be illuminated.

Restriction

Complete Authority

In order to manage the flashlight LEDs, TrollLEDs employs the exclusive BWFigCaptureDeviceVendor class within the mediaserverd framework. This generates a BWFigCaptureDevice instance (or OpaqueFigCaptureDeviceRef). Due to the limitation of only one instance at a time, if another application, such as mediaserverd, creates it, TrollLEDs will not have control over the flashlight LEDs. That is why there is a switch at the top of the app to restrict the flashlight LEDs to only be controlled by TrollLEDs. If you wish to utilize the LEDs or the Camera app from another source, you can either deactivate the switch and wait a few seconds, or terminate the app.

Worries About Battery Life

The flashlight device connection will remain active as long as the TrollLEDs app is in use. However, some users have reported experiencing battery drain. To address this problem, the app will shut down on its own after 5 minutes of being idle.

Construction

Create .tipa builds, both sandboxed and unsandboxed, as well as .deb builds, both rootful and rootless, using the following steps:

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The command to run the build script is “./build.sh”.

Download TrollLEDs IPA For iOS

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