Stills Mode
Ensure that any **internal battery** is **removed** from within the PIR v4 before an **external battery** or power source is connected to the sensor. Internal batteries cannot be connected and used at the same time as an external power supply. The only exception to this is if you are connecting a small external solar panel to trickle charge 6x Ni-MH AA batteries inside the PIR v4.
# Connecting Your Camera The Camtraptions PIR Sensor v4 can trigger your camera in two ways: **wirelessly** or via a **wired connection**. Both methods are compatible with DSLR and mirrorless cameras that feature an external shutter-release socket. #### **1. Wireless Connection (Default)** The sensor includes a built-in **wireless transmitter** that communicates with **Camtraptions Wireless Receivers**. This is the simplest and most flexible way to set up your camera trap. - The wireless transmitter is **enabled by default** and set to **Channel 1**. - You can change the channel via the [**Wireless Channel**](https://docs.camtraptions.com/books/pir-v4-manual/page/wireless-channel "Wireless channel") screen in the sensor’s menu. - Up to **15 channels** are available, corresponding directly with the 15 channels available on Camtraptions Wireless Receivers. To establish a connection: 1. Ensure the **wireless channel** on the sensor matches the **channel setting** on your wireless receiver. 2. Plug the **wireless receiver** into your camera’s **shutter-release socket** using the appropriate **Camtraptions camera connecting cable**. The wireless transmitter can be **disabled** in the menu if you prefer to operate the sensor via a wired connection. #### **2. Wired Connection** Alternatively, the sensor can be connected directly to the camera using a **wired cable**. - The camera output socket is located on the **underside** of the sensor and protected by a **weather-sealing rubber bung**. - Use the **Camtraptions Screw-lock Waterproof Cable for PIR Sensor v4** to connect the sensor to your camera’s shutter-release socket. Ensure that the black silicone sealing band on the waterproof cable's connector jack is seated evenly around the connector barrel. Plug in the cable and screw on the locking nut to fasten. **Do not over-tighten the cable's locking nut** - excessive force is not required to make a good seal. A robust and highly reliable direct connection is now created between the sensor and the camera.  A standard **Camtraptions camera connecting cable** or **sensor extension cable** can also be plugged into the sensor, but using these basic cables instead of the dedicated waterproof cable system will void the warranty of the PIR Sensor v4, as its weather-sealing will not be maintained. ##### **Waterproof Cable Connection Tips** - Even if only one of the waterproof connection types is being utilised, e.g. camera trigger signal output and not the external power input - it is recommended to securely fit **both ends** of the Screw-lock Waterproof Cable to the PIR v4. This ensures both of the sensor's ports and the cable's connectors are sealed against moisture and dirt, maintaining complete weather protection for the sensor and cable. - If access is restricted, removing the side flap and thumbscrew can make it easier to tighten or loosen the cable nut securely. - Additional Camtraptions Waterproof Cables and adapters will be necessary to complete the connection to the camera. #### **3. Choosing Between Wireless and Wired** Both connection types have advantages, depending on your setup requirements:| **Connection Type** | **Advantages** | **Considerations** |
|---|---|---|
| **Wireless** | Fast and simple setup. No long cables between camera and sensor, allowing greater flexibility in positioning. Reduces risk of cables being pulled, damaged, or chewed by animals. | Wireless receiver consumes additional power, impacting total standby time of the setup. |
| **Wired** | Very power-efficient. Does not require a powered receiver. Immune to wireless interference and blocked or weak wireless signals. | Requires a physical cable connection, limiting placement flexibility and adding potential for cable damage or disturbance. |
When selecting a mounting method, ensure that the chosen mount **does not obstruct the rear door** of the sensor when it is opened. If the mount prevents the door from opening fully, forcing it may damage the hinge. Always allow sufficient clearance for the door to open freely for battery changes.
# Controlling the Field of View The **field of view (FOV)** of the Camtraptions PIR Sensor determines **where an animal will be when the camera is triggered**, making it a crucial part of composing your images—particularly for still photography. The field of view can be adjusted in several ways to precisely control the trigger zone.  #### **1. Using the Adjustable Side Flaps** Each side of the sensor is fitted with a **flap** or **blinker** that can be used to **limit the field of view** of the PIR sensors. By folding the flaps outward, you can block unwanted detection zones to either side, ensuring that the sensor only triggers when an animal is directly in front of it. To adjust the flaps: 1. **Loosen the thumbscrew** on each flap. 2. Rotate the flap into the desired position to restrict the field of view as needed. 3. **Tighten the thumbscrew** again to hold the flap firmly in place. For best results, ensure that both flaps are positioned symmetrically, with the sensor aimed at the **centre of the intended trigger zone**. The PIR elements are most sensitive in the **middle of their field of view**, so symmetrical adjustment helps ensure that the sensor receives the strongest possible signal. If you would like to **reduce the field of view** even further than the standard side flap positions allow, then you can undo the thumbscrews fully and **swap the left and right flaps** around. This makes it possible to achieve a very narrow angle resulting in an extremely precise trigger area. Diagram showing flaps in reversed position:  #### **2. Using the Dual-Sensor System** Version 4 includes **two separate sensors**, each with a different field of view: - **Wide sensor:** approximately **60° horizontal field of view, 4.5° upward field of view, 13.5° downward field of view** — shorter range but broader coverage. - **Far sensor:** approximately **10° field of view (horizontal & vertical)** — longer range but more precise detection area. By adjusting the **relative sensitivity** of these two sensors, or disabling one entirely, you can fine-tune the spread and range of the trigger zone. It should also be noted that the Wide and Far sensors are both **most sensitive to motion along the horizontal axis** (sideways motion). They are less sensitive to upward/downward motion along the vertical axis. #### **3. Using the Indicator Light for Setup** One of the two front sensors includes a **built-in red indicator light** that can assist with setup. When the light is active, it briefly illuminates whenever motion is detected - helping you see exactly where the trigger zone begins and ends. To use the indicator light: 1. Turn on the sensor or press any button to **activate setup mode**. 2. Walk or wave a hand in front of the sensor to observe **where motion is detected**. 3. Adjust the sensor’s position or flap angles until the trigger zone aligns with your intended composition. The indicator light remains active for **five minutes** after the last button press, after which it automatically disables to conserve power. For more details, see the [**Indicator Light**](https://docs.camtraptions.com/books/pir-v4-manual/page/front-motion-indicator-light "Front motion indicator light") section later in this manual. # Turning Your Sensor On and Off The Camtraptions PIR Sensor v4 has been designed for **maximum reliability in long-term field deployments**. Its power-management system ensures that the sensor automatically recovers from any momentary power interruptions. #### **Automatic Power-On** The sensor **automatically turns on** as soon as power is connected. This behaviour is intentional and provides an important reliability safeguard. If power is ever **momentarily interrupted**—for example, by a brief loss of contact with the battery or vibration in the field—the sensor will automatically restart and resume operation without requiring user input. This ensures that your setup continues functioning even after jolts or disconnections. #### **Manual Power Control** Once power is connected, the sensor can be **turned on or off manually** using the **power button** on the rear keypad: - To **turn on**: Tap the power button and the screen will switch on. - To **turn off**: Hold the power button again for approximately **two seconds** until the screen shuts down. #### **Notes on Power Behaviour** - Because the sensor automatically powers on when a battery is inserted, it may **turn itself on during transport** if jostled or vibrated. This is normal and expected behaviour. - When used in setups powered from a **central battery** (e.g. a shared DC power supply feeding multiple devices), the sensor will automatically **power back on** when the central power source is reconnected or replaced. - In **solar-powered systems**, this feature ensures the sensor automatically resumes operation once solar charging restores power after an overnight or cloudy-day power loss. This design guarantees the **highest possible reliability** in unattended camera-trap installations, ensuring the sensor always returns to active operation when power is restored. # The Home Screen When the Camtraptions PIR Sensor v4 is powered on, it will display the **Home Screen**. This is the default screen shown when the sensor is idle and ready to detect motion. The Home Screen provides key information about the sensor’s current operating state at a glance. #### **Screen Indicators** The following elements are displayed on the Home Screen: - **S / V Symbol** – Indicates the current **shooting mode**. - **S** = Still photo mode - **V** = Video mode This icon is always visible and lets you confirm at a glance how the sensor will trigger the camera.|  |  |
|  |  |
| **Button** | **Hold Duration** | **Function** |
|---|---|---|
| **Left** | 2 seconds | Displays the current **time** set on the sensor’s internal clock — useful for quickly confirming the time setting. |
| **Up** | 2 seconds | Displays the current **battery voltage**, allowing you to check the remaining charge. |
| **Right** | 2 seconds | Displays the **firmware version**, so you can confirm you’re using the correct manual or check if an update is available. |
|  |  |
Note: C Var 6 (see the [**Custom Variables**](https://docs.camtraptions.com/books/pir-v4-manual/page/custom-variables "Custom Variables") section) can be used to limit the total recording length when Extend Time is enabled.
### **Video Trigger Mode (MODE)** The **Video Mode** screen defines how the sensor sends **start and stop signals** to the camera. Different camera brands and models interpret these signals differently, so selecting the correct mode ensures reliable video triggering. | **Mode** | **Description** | **Compatible Systems** |
|---|---|---|
| **1** | Sends a full-press signal to start recording, then repeats a full-press signal every **10 seconds** to maintain recording. If more than 10 seconds elapse without a signal, the camera automatically stops recording. | Sony cameras connected to the Camtraptions Sony Video Cable v2. |
| **2** | Sends a full-press signal to start recording and another full-press signal to stop recording. | Most Canon and Nikon mirrorless cameras. |
| **H** | Sends a **wireless** full-press signal to start recording, then repeats a full-press signal every **10 seconds** to maintain recording. The sensor holds a **wired** full-press signal for the entire length of the video. | Used to activate equipment requiring a constant full-press signal. |
**Mode 1** is typically the most reliable, as it ensures that if any trigger signal is missed, the camera will automatically stop recording instead of continuing indefinitely or becoming out of sync with the sensor’s start/stop commands.
**Mode 2** - Many cameras (including Canon and Panasonic models among others) that operate using Mode 2, also need an **intial half-press signal, followed by a pause**, so that they fully wake up first before starting a recording. This initial half-press signal + pause can be added using the global [**Wake Time**](https://docs.camtraptions.com/books/pir-v4-manual/page/wake-time "Wake Time") setting.
**Mode 2** - If a button on the sensor is pressed during a recording then the sequence will be cancelled and not completed. This means a camera may not receive the stop recording signal and will continue recording unless manually stopped.
# Suggested Camera Settings (Video) When using the Camtraptions PIR Sensor in **Video Mode**, camera setup will depend largely on **creative goals** and **equipment preferences**. This section focuses on the key settings that ensure **reliable operation** when the camera is controlled by the sensor, rather than prescribing specific exposure or quality settings. - **Focus Mode:** Use **Manual Focus** and pre-focus on the area where you expect the subject to appear. This prevents focus hunting when the camera is triggered and ensures consistent, sharp results. Use a small aperture to give a larger depth of field where necessary. - **Exposure and Quality Settings:** Choose your preferred **resolution, frame rate, and picture profile** according to creative requirements, memory capacity and power considerations. The sensor will not affect these choices. - **Power Saving:** Enable **Auto Power-Off** after approximately 30 seconds of inactivity to conserve battery life. The **Wake Time** feature of the sensor can be used (and for some cameras **must** be used) to reawaken the camera before a recording commences. - **Stabilisation:** Turn **off image stabilisation (IS/VR)** on both the camera and lens to avoid unnecessary power use and framing drift. - **Lights**: For night-time recording, use **continuous lights** rather than flashes. The sensor can trigger **Camtraptions Power Switches** to turn lights on and off using the same wireless signals that control the camera.For Nikon and Canon cameras, the camera’s menu settings must be configured to allow the shutter button to start and stop video recording. Enabling this option ensures the camera can respond correctly to trigger signals sent via the shutter release socket, allowing the sensor to start and stop video recording automatically.
# Global Settings The Global Settings apply to both Still and Video modes. These settings control the core behaviour of the sensor and remain active regardless of which shooting mode is selected. Global Settings include options such as Wireless Channel, Sensitivity, and the Far/Wide Sensor configuration. These settings define how the sensor detects motion and communicates with connected equipment. # Wireless Channel The **Wireless Channel** menu screen allows you to select which **wireless channel** the sensor’s built-in transmitter will use to communicate with your **Camtraptions Wireless Receiver**.  #### **Accessing the Wireless Channel Setting** 1. From the **Home Screen**, press the **Right Arrow** button until you reach the **Wireless Channel** screen. 2. Use the **Up** or **Down** buttons to change the wireless channel number. 3. Press the **Set** (centre) button to **save** your selection. The selected channel must match the channel set on your **Camtraptions Wireless Receiver** for proper operation. #### **Available Channels** The sensor supports **15 wireless channels**, numbered 1–15. Each corresponds directly to the same numbered channel on the [Camtraptions Wireless Receiver](https://store.camtraptions.com/collections/flash-cables-accessories/products/wireless-trigger?variant=30110971212). ** #### **Disabling Wireless Transmission** To **disable the wireless transmitter** completely (for wired-only operation): - Press and **hold** either the **Up** or **Down** button for more than **2** **seconds** while on the Wireless Channel screen. The display will show **“OFF”**, indicating that wireless transmission is disabled. In this mode, the sensor will **only trigger connected devices via the wired output socket**. It will also conserve some power and allow the sensor to operate for even longer in the field. # Wide Sensor The **Wide Sensor** menu screen allows you to adjust the behaviour and sensitivity of the **wide-angle PIR lens**. This sensor has a broader field of view (approximately **60°**) and is ideal for detecting animals earlier as they approach the camera.|  | |
|  |  |
| **Mode** | **Description** |
|---|---|
| **Normal** | The sensor behaves normally, triggering the camera or flash when motion is detected. |
| **Off** | The wide sensor is disabled and will not detect motion or trigger the camera. |
| **Wake** | The wide sensor will only send a **wake signal** to connected camera equipment when motion is detected, but not a full trigger signal. |
Note: Camtraptions Z Pro Flashes remain fully charged and ready to fire instantly, so this feature is not required when using Z Pro units.
Note: If a sensor is set to **Wake** mode, then the signal will only be sent if the PIR v4 has not been active within the last 30 seconds. This ensures that no unnecessary wake signals (and potential trigger delays) are occuring during periods of continuous activity in front of the PIR.
# Far Sensor The **Far Sensor** menu screen allows you to adjust the behaviour and sensitivity of the **long-range PIR lens**. This sensor has a much **narrower field of view** (approximately **10°**) and is significantly more sensitive overall than the wide sensor. It is designed for precise control of the trigger zone, enabling the user to determine exactly **where in the frame** the animal will be when the camera is activated. Because of its narrow detection zone, the far sensor can be used much like a **“beam break”**, ideal for cutting across an animal trail or pathway to ensure triggering occurs only when the subject reaches a specific point.|  |  |
| **Mode** | **Description** |
|---|---|
| **Normal** | The sensor behaves normally, triggering the camera or flash when motion is detected. |
| **Off** | The far sensor is disabled and will not detect motion or trigger the camera. |
| **Wake** | The far sensor sends only a **wake signal** to connected camera equipment but does not trigger a full shoot command. |
|  |  |
Note: The clock setting is retained internally, even when the sensor is powered off or the battery is removed.
Note: For accurate operation of **Time Windows**, ensure the clock is set to **local time** in the location where the sensor is being deployed.
# Enable Time Windows The **Time Windows** setting allows you to control when the sensor is active during a 24-hour period. When enabled, the sensor will automatically disable itself outside the defined time window, allowing it to operate only during selected hours (for example, **nighttime only** or **daytime only** operation).  #### **Enabling or Disabling Time Windows** 1. From the **Home Screen**, press the **Right Arrow** until you reach the **Time Windows** screen. 2. Press the **Up** or **Down** button to toggle between **ON** and **OFF**. When **Time Windows** are enabled, a **clock icon** will appear on the **Home Screen**, indicating that scheduled operating hours are active. The clock icon on the **Home Screen** will be accompanied by either **ON** or **OFF**. This provides a convenient indication of whether the sensor is currently inside an active time window (**ON**) and is therefore **working**, or outside an active time window (**OFF**) and is therefore is **disabled**. #### **Notes on Operation** - When Time Windows are **ON**, the sensor will remain **inactive** outside the specified time range. - Currently, **only one time window** can be defined per 24-hour cycle (for example, limiting operation to daylight or night hours). - Ensure the **internal clock** is correctly set before enabling Time Windows (see *Set Clock Time* section).Future firmware updates may introduce the ability to configure multiple time windows. If multiple time windows would be a valuable feature for your application, please contact **Camtraptions** for updates or to provide feedback.
An active Time Window may cause the sensor to appear unresponsive. If the sensor does not seem to react to motion, first check whether the clock icon is visible on the Home Screen and if the activity indicator is displaying **OFF**. If it is, verify that the internal clock and time window settings are correct.
# Set On Time The **Window On Time** setting defines the time of day when the sensor becomes **active** — in other words, the start of the period during which motion detection and triggering are enabled. This feature works in conjunction with the **Time Windows** setting. For example, if you wish the sensor to operate **only at night**, you might set the *Window On Time* to **18:00 (6:00 p.m.)** and the *Window Off Time* to **06:00 (6:00 a.m.)**.  #### **Setting the Window On Time** 1. From the **Home Screen**, press the **Right Arrow** until you reach the **Window On Time** screen. 2. Use the **Up** or **Down** buttons to adjust the **hour** value. 3. Press the **Set** button to confirm the hour. 4. The **minute** value will then begin flashing — use the **Up** or **Down** buttons to adjust it. 5. Press **Set** again to save the time. The time is entered in **24-hour format** (00:00 to 23:59). #### **Notes** - Ensure the **Time Windows** feature is **enabled** for this setting to take effect. - For reliable operation, confirm that the **sensor clock** is set accurately before adjusting time windows (see [**Set Clock Time**](https://docs.camtraptions.com/books/pir-v4-manual/page/set-clock-time "Set Clock Time") section). # Set Off Time The **Window Off Time** setting defines the time of day when the sensor becomes **inactive**, marking the end of the period during which motion detection and triggering are enabled. This setting works together with the **Window On Time** to establish the daily operating period for the sensor. For example, if you want the sensor to operate **only at night**, you might set the *Window On Time* to **18:00 (6:00 p.m.)** and the *Window Off Time* to **06:00 (6:00 a.m.)**.  #### **Setting the Window Off Time** 1. From the **Home Screen**, press the **Right Arrow** until you reach the **Window Off Time** screen. 2. Use the **Up** or **Down** buttons to adjust the **hour** value. 3. Press the **Set** button to confirm the hour. 4. The **minute** value will then begin flashing — use the **Up** or **Down** buttons to adjust it. 5. Press **Set** again to save the time. The time is entered in **24-hour format** (00:00 to 23:59). #### **Notes** - Ensure the **Time Windows** feature is **enabled** for this setting to take effect. - The **sensor will remain inactive** outside the defined time window. - If the Off Time is set to the same value as the On Time, the sensor will remain active at all times. - For reliable operation, confirm that the **sensor clock** is set correctly before defining time windows (see [**Set Clock Time**](https://docs.camtraptions.com/books/pir-v4-manual/page/set-clock-time "Set Clock Time") section). # External Wake The **Periodic External Wake** setting allows the sensor to send a brief **half-press (wake)** signal to the connected camera or flash equipment at regular intervals. This periodic signal helps prevent certain devices from entering deep sleep modes and ensures they remain responsive for long-term deployments.  #### **Purpose of Periodic Wake** This feature can be useful for a variety of situations, including: - **Preventing cameras** from entering deep sleep or becoming unresponsive if left idle for long periods (for example, some models require a command at least once every 24 hours). - **Keeping third-party flashes** active by preventing them from entering power-saving modes. Although there are several potential uses, the **main purpose** of this setting is to maintain camera responsiveness in systems that may otherwise power down or lose connection over extended periods of inactivity. #### **Setting the Periodic Wake Interval** 1. From the **Home Screen**, press the **Right Arrow** until you reach the **Periodic Wake** screen. 2. Use the **Up** or **Down** buttons to adjust the desired time interval in hours and minutes, from a minimum of 1 minute to a maximum of 24 hours. 3. Press the **Set** button to confirm and save your setting. The interval can be configured in **minutes and hours**, and the sensor will send a brief **wake signal** to the connected equipment at each interval. #### **Enable or Disable the Periodic Wake Function** - **Hold** either the **Up** or **Down** button for more than **2 seconds** while on the **EXT WAKE** screen. - When active, the display will show the **“ON”** indicator.Panasonic cameras, such as the Panasonic GH4 and GH5, can enter a deep sleep state after extended inactivity. To prevent this, set a Periodic Wake interval of around 11 hours. This ensures the sensor sends a brief wake signal periodically, keeping the camera responsive during long deployments.
#### **Notes** - **Periodic Wake signals are only sent during active time windows.** If Time Windows are enabled, wake signals will not be transmitted while the sensor is in an off-window period. - If using **Camtraptions flashes** or cameras that remain active without assistance (which is the majority of cameras), this setting is not required. - Using shorter intervals will slightly increase power consumption (not just of the sensor but of the equipment being woken), so choose the **longest interval** that reliably keeps your equipment awake. # Advanced Configuration Advanced Configuration provides in-depth control through Custom Variables (C Vars), allowing you to fine-tune signal durations, flash behaviour, and specialist functions. It also explains how to restore factory defaults and manage complex custom setups safely. # Custom Variables The **Custom Variables** menu provides access to advanced configuration options that allow the behaviour of the sensor to be **fine-tuned**. These variables modify timing parameters that affect how the camera is triggered, how long signals are held for, and other aspects of sequence timing. For the majority of users, customising these settings is generally unnecessary. In some cases, enabling or adjusting a Custom Variable may **override standard Still or Video Mode settings**, resulting in slightly different sequence timing than expected. These options are intended for advanced users who require precise control over the triggering sequence. ### **Accessing Custom Variables** 1. From the **Home Screen**, press and hold the **Left and Right Buttons** simultaneously for more than **2 seconds** until the **Custom Variables** (C VAR) screen appears. 2. Use the **Left** and **Right** buttons to select the desired variable number. 3. Use the **Up** and **Down** buttons to select the desired variable value. 4. Press **Set** to save the new value. 5. Some custom settings can also be enabled or disabled by holding the **Up** or **Down** button for more than **2 seconds** to toggle them **On** and **Off**.  ### **Leaving the Custom Variable Menu** From the custom variable menu, you can return to the Home Screen by either: - Not pressing a button for 20 seconds. - Pressing the **Left and Right Buttons** simultaneously for more than **2 seconds.** ### **Available Custom Variables**| **C Var** | **Description** | **Default Value** | **Adjustable Range** |
|---|---|---|---|
| 0 | **[Sampling Frequency / Adaptive Sensitivity](https://docs.camtraptions.com/books/pir-v4-manual/page/custom-variable-0 "Custom Var 0")** – Fine-tune the sensor sensitivity and response speed. | 8 | 1-16 |
| **1** | [**Half-Press Length (Before Full Press)**](https://docs.camtraptions.com/books/pir-v4-manual/page/custom-variable-1 "Custom Var 1") – Determines how long the half-press (wake) signal is held before the full-press trigger in both still and video modes. | 0.1 s | 0.1–5.0 s (in 0.1 s steps) |
| **2** | **Half-Press Length (After Full Press)** – Determines how long the half-press signal is held after the full-press trigger in both still and video modes. | 0.1 s | 0.1–5.0 s (in 0.1 s steps) |
| **3** | **Full-Press Duration (Still Mode)** – If enabled, this overrides the full-press timing determined by the FPS setting. | — | 0.1–2.9 s (in 0.1 s steps) |
| **4** | **Gap Between Full-Press Signals (Still Mode)** – When *Number* (NUM) > 1, this defines the interval between shots. If enabled, it overrides the FPS-determined interval. | — | 0.1–15.0 s (in 0.1 s steps) |
| **5** | **Full-Press Duration (Video Mode)** – Defines how long the full-press signal is held when starting or maintaining a video recording. | 1.0 s | 0.1–2.9 s (in 0.1 s steps) |
| **6** | **Maximum Video Length Extension Limit** – Sets an absolute maximum video extension length in minutes. This limits the total recording duration when *Extend Time* is enabled. The maximum recording time will be this variable plus the standard [recording time](https://docs.camtraptions.com/books/pir-v4-manual/page/video-mode-settings "Video Mode Settings"). | — | 1–60 min |
| **7** | [**Flash Wake / Flash Fire Signals**](https://docs.camtraptions.com/books/pir-v4-manual/page/custom-variables-7-and-8 "Custom Var 7 and 8") – Controls whether flash trigger signals are sent during still sequences: • 0 – No flash wake or fire signals sent. • **1** – A 0.2 s **Flash Wake** signal is sent immediately before the **first** camera trigger signal in any still sequence. • **2** – A 0.2 s **Flash Wake** signal is sent immediately before the **first** camera trigger signal, and a 0.2 s **Flash Fire** signal is sent after **every** camera trigger signal in the sequence. | 0 | 0–2 |
| **8** | [**Flash Signal Channel**](https://docs.camtraptions.com/books/pir-v4-manual/page/custom-variables-7-and-8 "Custom Var 7 and 8") – Sets the **wireless channel** (1–15) used for the Flash Wake and Flash Fire signals defined by C Var 7. This should be set to a different channel than the [main camera trigger channel](https://docs.camtraptions.com/books/pir-v4-manual/page/wireless-channel "Wireless Channel"). | — | 1–15 |
| **9** | **Wireless Power Boost** – When set to "1", this setting increases the strength of the wireless signal to improve reliability in setups where there may be signal interference, long distances, or obstructions between the sensor and the receiver. This is an **experimental option** intended primarily for troubleshooting wireless connectivity issues. In most circumstances, the default power level provides the best balance between range, battery efficiency, and signal stability. | 0 | 0–1 |
Adjusting Custom Variables can affect the timing of the camera’s wake, trigger, and release signals.
# Custom Variable 0 The **C Var 0** menu screen allows you to adjust how **responsive** the sensor is to motion across both lenses. It controls how **frequently** the sensor is taking measurements to look for **movements** (changes in infrared radiations) across its field of view. Taking more frequent measurements means that the sensor will be able to pick up **smaller or more fleeting movements** that might otherwise be missed if it is sampling less frequently. This is different to the **main [far](https://docs.camtraptions.com/books/pir-v4-manual/page/far-sensor "Far Sensor") & [wide](https://docs.camtraptions.com/books/pir-v4-manual/page/wide-sensor "Wide Sensor") sensitivity setting** which relate to the **amplitude** of the infrared signal required to trigger the sensor, i.e. how **warm, large or close** the subject must be.  #### **Adjusting Sampling Frequency** 1. From the **C Var 0** screen, use the **Up** or **Down** buttons to change the value. 2. Press the **Set** button to **save** your selection. Sampling Frequency can be set between **1** and **16** (the default is 8), where: - **16** = Maximum sampling frequency (the sensor will detect faster, smaller and more momentary movements). - **1** = Minimum sampling frequency (requires slower, larger and more pronounced movement to trigger). At higher sampling frequencies, the sensor will consume slightly more power and may be more susceptible to false triggering from wind, vegetation or dappled light, but it will be more effective at detecting small, rapidly moving subjects. Therefore, you should look to optimise the sampling frequency based on the intended subject, the environmental conditions and your battery life requirements. #### **Adaptive Sensitivity Mode** The sensor also features an **Adaptive Sensitivity** algorithm designed to help reduce false triggers in challenging environments. To enable or disable Adaptive Sensitivity: - **Hold** either the **Up** or **Down** button for more than **2** **seconds** while on the **C Var 0** screen. - When active, the display will show the **“ON”** indicator for Adaptive Sensitivity.  In this mode, the sensor dynamically adjusts its primary sensitivity thresholds, i.e. the thresholds that relate to the main [far](https://docs.camtraptions.com/books/pir-v4-manual/page/far-sensor "Far Sensor") & [wide](https://docs.camtraptions.com/books/pir-v4-manual/page/wide-sensor "Wide Sensor") sensitivity settings (**not** the sampling frequency) in response to background activity levels: - If there is **persistent low-level motion or heat variation** (for example, caused by wind-blown vegetation or rising warm air during the middle of the day), the trigger threshold is automatically increased. - When background movement decreases, the sensor gradually lowers the threshold again. This adaptive behaviour helps the sensor remain effective while **reducing false detections** under fluctuating environmental conditions. In most circumstances, **Normal Sensitivity Mode** provides sufficient control. However, if false triggers occur intermittently — such as at certain times of day or under windy or hot conditions — **Adaptive Sensitivity Mode** could improve reliability. # Custom Variable 1 ### **Using Half-Press Duration for Autofocus (C Var 1)** **C Var 1** controls the **length of the half-press (HP)** signal that is sent to the camera before the full-press (FP) trigger. By extending this half-press duration, the sensor gives the camera time to perform **autofocus** functions before the image is taken. With newer **mirrorless cameras** offering highly advanced autofocus systems — including **animal-eye detection** — this feature allows autofocus to be used in camera-trap setups for the first time. When the half-press signal is active, the camera can detect and focus on the subject before the shutter is triggered, enabling the possibility of shooting with a **shallow depth of field** and precise eye focus, creating images that differ greatly from traditional manual-focus camera-trap photos. #### **Practical Considerations** - **Focus reliability:** Autofocus-based setups are inherently less reliable than manual focus. Some images may be misfocused if the camera fails to detect the correct point of interest or locks onto background elements. - **Lighting:** Autofocus requires **continuous light** to function. For nighttime use, **video lights** may be necessary, as flashes alone will not provide light until after focus is attempted. - **Timing:** The optimal half-press duration depends on the camera model and lens. Mirrorless cameras typically require between **0.2 s and 1 s** for accurate subject detection and focus acquisition. This setting introduces a new creative approach to camera trapping — enabling **autofocus precision** and **shallow-depth-of-field imagery** previously impractical with PIR triggers. While manual focus remains the most dependable method for critical work, **C Var 1** offers an exciting opportunity to experiment with modern autofocus systems for more dynamic and cinematic results. # Custom Variables 7 and 8 ### **Wireless Flash Wake and Flash Fire (C Var 7 & C Var 8)** **C Var 7 and 8** provide advanced control for managing external flashes, particularly in situations where the **camera cannot wake or trigger flashes automatically**. This feature is especially useful with **Sony cameras**, which do not send a wake signal to flashes before triggering them. While flashes such as the **Camtraptions F1** and **Z2** do not require a wake signal, the **Camtraptions Z Pro** achieves much longer standby times by entering a low-power sleep mode. As a result, it must be **woken** before it can be triggered. In such cases, the **sensor** can take over flash control independently: - **C Var 7 = 1:** The sensor sends a **0.2 s Flash Wake signal** immediately before the **first** camera trigger signal in any stills sequence. This wakes compatible flashes (such as the Z Pro) so that they are ready when the **camera** sends its normal shoot signal. - **C Var 7 = 2:** The sensor sends both a **Flash Wake signal** before the **first** camera trigger signal **and** a **Flash Fire signal** after **every** camera trigger signal. In this configuration, the **camera does not need to send any flash trigger signal**—the sensor handles all flash timing directly. The **wireless channel** used for these **flash signals** is defined by **C Var 8**, which can be set between **1 and 15**. This should be set to a **different channel** than the [main camera trigger channel](https://docs.camtraptions.com/books/pir-v4-manual/page/wireless-channel "Wireless Channel"). The **C Var 7 = 2** configuration is particularly effective for **night-time photography**, where **long shutter speeds** allow the flash to fire during the exposure window. As long as the **shutter speed is longer than the Full-Press duration**, the flash will fire within the open exposure, even when the camera itself is not controlling the flash. The Full-press duration can be customised using C Var 3 so that the flash fires as quickly as possible after the camera shutter opens. This setup provides a **reliable and flexible method** to trigger flashes entirely via the sensor, simplifying configurations where cameras have limited flash-control capabilities or when using **off-camera flash systems** in low-light environments. # Reset to Defaults From the **Custom Variables (C Var)** menu, if you continue scrolling past the last C Var entry, you will reach a screen labelled **“reset”**. This screen allows you to **restore all sensor settings to their factory defaults**. This is useful if many settings or Custom Variables have been adjusted and you want to quickly return the sensor to its original standard behaviour.  #### **Performing a Reset** 1. Navigate to the **Custom Variables (C Var)** menu. 2. Continue scrolling using the **Right Arrow** until you reach the **“reset”** screen. - The word **“reset”** will appear **without blinking**. 3. Press the **Up** or **Down** button once — the word **“reset”** will begin **blinking**, indicating that the reset function is armed. 4. Press the **Set** button to confirm. - The text **“reset”** will disappear. - The **clock symbol** will blink for approximately **3 seconds**, indicating the reset is in progress. - When complete, the sensor will automatically return to the **Home Screen**. #### **Cancelling a Reset** If, while **“reset”** is blinking, you press **Left** or **Right** instead of **Set**, the screen will move back to the previous or next C Var setting, and **no reset will be performed**. #### **Notes** - Resetting the sensor restores **all user-configurable options** (including Global, Still, Video, and Custom Variable settings) to their **factory defaults**. - The **firmware version** remains unchanged. - After performing a reset, it’s recommended to review your key configuration settings (e.g., wireless channel, mode, and time) before redeploying the sensor. # Maintenance and Care This section covers best practices for maintaining the sensor’s performance and reliability. Topics include weatherproofing, cleaning, and firmware updates — ensuring your equipment remains dependable in harsh field environments. # Weatherproofing The Camtraptions PIR Sensor v4 is built for reliable operation in demanding outdoor conditions. However, regular checks and care are essential to maintain its weather resistance and ensure dependable long-term performance. #### **1. Check and Clean Seals** The main seal around the **battery door** is critical to maintaining a watertight enclosure. - Ensure the seal and its contact surface are **clean and free from vegetation, debris or grit** before closing the door. - Inspect the seal periodically for **wear, cracking, or deformation**. - If a seal is damaged, it should be replaced. **Replacement seals** can be obtained by contacting **Camtraptions Support**. #### **2. Protect Unused Openings** All external ports and access points should be securely sealed when not in use. - Ensure the **weatherproof rubber caps** covering the **power and camera signal sockets** are firmly fitted to prevent moisture or dirt ingress. - Check that the **SD card bung** (located beneath the right-hand flap) is fully inserted after use to protect the memory card slot. - Replacement caps and bungs are available from **Camtraptions** if any are lost or damaged. #### **3. Use Silica Gel** In all environments, but particularly in **wet or humid conditions**, it is recommended to place a **small sachet of silica gel** inside the **battery compartment**. There is space beside the battery for this purpose. - The silica gel will **absorb residual moisture** introduced when the door is opened (for example, during battery changes) and helps prevent internal condensation. - Any small silica sachet that fits can be used, though **Camtraptions 1 g individually sealed sachets** are ideal for this application. - Replace the sachet every **4-8 weeks in humid climates** or every 3-6 months in temperate conditions. Replace the sachet more often if the battery door is being frequently opened. This simple precaution can significantly enhance the **longevity and reliability** of the sensor in challenging climates. #### **4. Avoid Submersion or Flood Risk** The sensor is **weather-resistant but not waterproof**. It is not designed to be submerged and should not be deployed in locations where it could be flooded — for example, in areas prone to **rising water, heavy runoff, or riverbank overflow**. Always mount the sensor in a position where it remains above likely water levels. #### **5. Freeze-thaw Precautions** In cold, wet environments, water could accumulate in the seam between the battery door and the main enclosure body. If temperatures drop below freezing, this water can **turn to ice and expand**, placing pressure on the door latch and potentially compromising the seal. To minimise this risk, you can apply a **wide strip of waterproof tape** around the door joint—running from one lower corner of the enclosure, across the top of the latch, and down to the opposite lower corner. This simple precaution helps prevent water from pooling in the seam, reducing the likelihood of freeze-related damage during cold, wet deployments.  # Firmware Update The Camtraptions PIR Sensor v4 supports **firmware updates** via microSD card. This allows new features, improvements, and bug fixes to be installed easily by the user without returning the sensor for servicing. This manual applies to firmware version {{@0tag:Firmware Version}}. Check the sensor's current firmware version by navigating to the **Home Screen** and holding down the **right arrow** button for 2 seconds. If necessary, you can update the firmware by following the instructions below. #### **Downloading Firmware** The latest firmware releases can be downloaded from the **Camtraptions website**: **[camtraptions.com/resources/pir-v4/](https://www.camtraptions.com/resources/pir-v4/)** Each firmware version will include a short description of changes. #### **Preparing the microSD Card** To perform a firmware update, you will need a **microSD memory card** *(not supplied)*. - The card must be **formatted in FAT32** and **no more than 32 GB in total capacity.** - Copy the two downloaded firmware files directly into the **root directory** of the card — do not place them inside a folder or rename it.  #### **Inserting the microSD card** You may find it helpful to use a pair of thin-nose pliers to insert the SD card into the sensor. The card slot is located beneath the right-hand flap on the side of the sensor. Remove the bung and insert the SD card so that the edge of the card is flush with the edge of the board.   It is possible to accidentally drop the microSD card into the sensor. If this happens then just turn it over and shake it until the card falls out again. #### **Installing the Firmware** 1. Ensure a **fully charged battery** is installed in the sensor. 2. Insert the prepared **microSD card** into the **card slot** beneath the right-hand flap. 3. **Hold the Down button** while switching the sensor **on** to begin the update process. 4. The screen will not display anything but the **red** indicator light on the front of the sensor will turn on and shine **constantly** to indicate that the update is underway. 5. Wait approximately **30 seconds** while the firmware updates. 6. When complete, the **front LED** will blink briefly to confirm the update has finished successfully. The sensor's LCD screen will automatically turn on. 7. You can now remove the microSD card carefully using thin-nose pliers and re-insert the rubber card slot bung, making sure it is fully seated.Do **not** remove the battery or power during the update process, as this could interrupt installation and corrupt the firmware.
If the microSD card is not inserted correctly (or not inserted at all) and the update procedure is commenced using the sensor's keypad, then the red LED will **flash** rapidly to indicate an **error**. To resolve this, remove the battery from the sensor to turn it off, then make sure the microSD is **correctly inserted** before re-attempting the firmware update procedure.
#### **Verifying the Update** To confirm the update was successful: 1. From the **Home Screen**, **hold the Right button** to display the new firmware version. 2. Check that the displayed version matches the firmware file you installed. If the version number does not match or the sensor does not boot normally, repeat the update process using a freshly formatted microSD card. # Reference The Reference section compiles technical data, timing charts, and specifications. It serves as a quick lookup guide for signal sequences, variable definitions, and voltage tables — useful for troubleshooting and advanced configuration work. # Stills Sequence Timings These flowcharts outline the sequence of operations when the sensor is set to **Still Mode**, for both Wireless and Wired outputs, including all optional timing adjustments via menu settings and **Custom Variables (C Vars)**.| **Abbreviation** | **Meaning** | **Description** |
|---|---|---|
| **HP** | **Half-Press** | A half-press signal sent to the camera to wake it, initiate autofocus, or prepare flashes before a capture. |
| **FP** | **Full-Press** | A full-press signal that triggers the camera’s shutter release or starts/stops video recording. |
| **FW** | **Flash Wake** | A signal sent to compatible wireless flash units to wake them from sleep before firing. |
| **FF** | **Flash Fire** | A signal sent to trigger compatible flashes at the moment of exposure. |
| **Abbreviation** | **Meaning** | **Description** |
|---|---|---|
| **HP** | **Half-Press** | A half-press signal sent to the camera to wake it or initiate autofocus. |
| **FP** | **Full-Press** | A full-press signal that triggers the camera’s shutter release or starts/stops video recording. |
| **Voltage (V)** | **Approx. Remaining Capacity** |
|---|---|
| 8.4 V | 100 % (Fully charged) |
| 8.2 V | 90 % |
| 8.0 V | 80 % |
| 7.8 V | 70 % |
| 7.6 V | 60 % |
| 7.4 V | 50 % |
| 7.2 V | 40 % |
| 7.0 V | 30 % |
| 6.8 V | 20 % |
| 6.6 V | 10 % |
| ≤ 6.4 V | Battery nearly depleted — recharge recommended |
| **Voltage (V)** | **Approx. Remaining Capacity** |
|---|---|
| 9.3 V | 100 % (Fresh batteries) |
| 9.0 V | 90 % |
| 8.7 V | 80 % |
| 8.4 V | 70 % |
| 8.1 V | 60 % |
| 7.8 V | 50 % |
| 7.5 V | 40 % |
| 7.2 V | 30 % |
| 6.9 V | 20 % |
| 6.6 V | 10 % |
| ≤ 6.3 V | Batteries depleted — replace soon |
| **Voltage (V)** | **Approx. Remaining Capacity** |
|---|---|
| 8.4 V | 100 % (Fully charged) |
| 8.2 V | 90 % |
| 8.0 V | 80 % |
| 7.8 V | 70 % |
| 7.6 V | 60 % |
| 7.4 V | 50 % |
| 7.2 V | 40 % |
| 7.0 V | 30 % |
| 6.8 V | 20 % |
| 6.6 V | 10 % |
| ≤ 6.4 V | Recharge required |