28
4. GPIO Connection
The WAT-01U2 / WAT-03U2/ WAT-06U2 / WAT-07U2 has a 2 pin GPIO (General Purpose Input/Output)
connector at the back of the camera. Currently, an external trigger for capturing Snapshot is assigned to
this connection.
*The WAT-02U2D / WAT-03U2D / WAT-05U2M / WAT-06U2D / WAT-07U2D doesn't have
this function.
4.1.Snapshot Function
To use the GPIO Snapshot function, refer to the figure below to connect the 2 pin cable to the camera
GPIO connector and use a push button switch as the trigger is recognized by closing of the circuit.
When the button is pressed (circuit is closed), the camera will stop the video capture and switch to the
static image capture. A static image approximately 1 second after the button is pressed will be
output. Thereafter, the camera will revert back to the video capture.
From the time when the button is pressed until the Snapshot is output, the camera will adjust the
exposure and white balance. During this time, please note that a good Snapshot may not be captured,
if the environment changes, such as lighting conditions.
4.1.1.Method to Confirm Operation (saving of static image)
The saving of the image file captured by the Snapshot function is done by using the
WatecCameraViewer (available for download from our website: http://www.watec.co.jp/).
While the WatecCameraViewer is open, and the video image can be previewed, shorting the GPIO
circuit will save a Snapshot to an image file (.jpg or .bmp).
(The image file will be saved in the same folder as where the WatecCameraViewer is operating)
The same Snapshot function can be operated from the WatecCameraViewer.
(Capture->Trigger for Still Capture)
*Please heed caution to the following when using the WatecCameraViewer in the Windows
Vista/7/8/8.1/10 OS environments:
・
When starting the program from C:¥ProgramFiles¥.. with UAC (User Account Control) enabled,
make sure to start up the WatecCameraViewer with Administrator rights, as creating and saving of
new files in this folder/directory tree is not permitted without Administrator rights. (Right Click on
WatecCameraViewer executable file -> Run as administrator)
Please refer to the following section for setting of the image file to be saved.