1. Introduktion
The Mighty Mule FM231 Wireless Driveway Alarm is designed to provide reliable vehicle detection for enhanced security around your home, business, or property. This system utilizes an electromagnetic sensor to detect the movement of large metal objects, such as vehicles, thereby minimizing false alarms that might be triggered by animals or pedestrians.
Upon detection, the outdoor sensor transmits a wireless signal to an indoor receiver, which then alerts you with an audible chime. The system offers a wireless range of up to 400 feet between the outdoor transmitter and the indoor receiver, making it suitable for monitoring various property sizes and long driveways. The FM231 system is expandable, allowing for the addition of multiple indoor receivers (sold separately) to extend coverage across different areas of your property.
2. Produktet er slutview og komponenter
The Mighty Mule FM231 Wireless Driveway Alarm system includes the following main components:
- Electromagnetic Sensor: Detects large metal objects.
- Trådløs sender: Sends signals from the sensor to the receiver.
- Indoor Receiver: Provides audible alerts and visual indicators.
- Power Transformer: For the indoor receiver.
- Monteringsstolpe: For outdoor sensor installation.
- Instruktionsmanual: Dette dokument.

Image 2.1: All components included in the Mighty Mule FM231 Wireless Driveway Alarm kit. This includes the sensor, transmitter, receiver, power adapter, and mounting hardware.

Image 2.2: Diagram illustrating the wireless communication between the outdoor sensor/transmitter and the indoor receiver when a vehicle is detected.
3. Opsætning og installation
The Mighty Mule FM231 is designed for straightforward installation. Follow these steps for optimal performance:
3.1 Sensor and Transmitter Placement
- Vælg en placering: Select a location next to your driveway where the sensor can be buried. Ensure it is positioned to detect vehicles entering or exiting your property.
- Bury the Sensor: Dig a shallow trench and bury the electromagnetic sensor and its connecting wire next to the driveway. The sensor should be positioned to detect large metal objects effectively.
- Position the Transmitter: The transmitter unit should be placed near the buried sensor, ideally on the included mounting post. While the system is weather-resistant, protect the transmitter from direct exposure to sprinklers or heavy rain to ensure longevity.

Image 3.1: The outdoor sensor being installed by burying it discreetly next to a driveway.

Image 3.2: An installed sensor detecting a vehicle on a driveway, demonstrating its intended function.
3.2 Batteriinstallation
The outdoor transmitter is battery-powered, requiring 2 AA batteries (not included). Install the batteries in the transmitter unit near the installation site. Installing batteries in a different location, such as inside your home, may prevent the unit from functioning correctly due to environmental differences affecting its initial calibration.
3.3 Indoor Receiver Setup
- Strømtilslutning: Plug the indoor receiver into a standard electrical outlet using the provided power transformer.
- Placering: Position the receiver in a central location within your home or business where the audible chime can be easily heard. Consider the 400-foot wireless range from the outdoor transmitter. Obstructions like thick walls or metal structures can reduce this range.

Image 3.3: The compact indoor receiver placed on a kitchen counter, ready to alert users.
4. Betjeningsvejledning
Once installed, the Mighty Mule FM231 operates automatically to detect vehicles.
4.1 Køretøjsdetektering
The electromagnetic sensor continuously monitors for large metal objects. When a vehicle passes within its detection range, the sensor triggers the wireless transmitter.
4.2 Modtagelse af advarsler
The transmitter sends a signal to the indoor receiver. The receiver will then emit an audible chime to alert you of the detected vehicle. The receiver typically includes a visual indicator (e.g., an LED light) that illuminates when an alert is received, remaining on until manually reset.

Image 4.1: A vehicle entering a driveway, triggering the outdoor sensor, and the indoor receiver sounding an alert.
4.3 Systemudvidelsesmuligheder
The system supports additional indoor receivers (model FRM231-R, sold separately) for broader coverage. This allows you to place receivers in multiple rooms or buildings within the wireless range, ensuring you receive alerts regardless of your location on the property.
5. Vedligeholdelse
Regular maintenance ensures the longevity and reliable operation of your Mighty Mule FM231 Wireless Driveway Alarm.
5.1 Udskiftning af batteri
The outdoor transmitter is powered by 2 AA batteries. The system includes a low battery indicator for both the sensor and the receiver. When the low battery indicator activates, replace the batteries promptly to avoid interruption in service. Use quality alkaline batteries for best performance and extended life.
5.2 Miljøbeskyttelse
The outdoor components are designed to be weather-resistant. However, to maximize their lifespan, avoid direct exposure to high-pressure water sources like sprinklers or prolonged heavy rain. Ensure the transmitter unit is positioned in a location that offers some protection from extreme weather conditions.
6. Fejlfinding
If your Mighty Mule FM231 Wireless Driveway Alarm is not functioning as expected, consider the following troubleshooting steps:
- No Detection/No Alert:
- Tjek batterier: Verify that the outdoor transmitter has fresh 2 AA batteries installed. The system has a low battery indicator; replace batteries if it is active.
- Batterikontakter: Inspect the battery compartment for any corrosion on the contacts. Clean them thoroughly if necessary.
- Sensorplacering: Ensure the sensor is correctly buried and positioned to detect vehicles. The electromagnetic sensor is designed to detect large metal objects, not pedestrians or small animals.
- Trådløs rækkevidde: Confirm the indoor receiver is within the 400-foot wireless range of the outdoor transmitter. Large obstructions or metal structures between the units can reduce effective range.
- Dip switches: If applicable, gently toggle any internal dip switches back and forth a few times to clear potential corrosion, then return them to their original settings to match the receiver.
- Falske alarmer:
- The FM231 uses electromagnetic detection to minimize false alarms from animals or pedestrians. If false alarms occur, re-evaluate the sensor's placement to ensure it is not too close to other large metal objects or sources of electromagnetic interference.
- Receiver Not Functioning:
- Ensure the indoor receiver is properly plugged into a working electrical outlet.
7. Specifikationer
| Mærke | Mægtige Mule |
| Modelnummer | FM231 |
| Forbindelsesteknologi | Trådløs |
| Strømkilde (sender) | 2 AA batterier (medfølger ikke) |
| Strømkilde (modtager) | Cordless-electric (via transformer) |
| Maksimal trådløs rækkevidde | Up to 400 feet (transmitter to receiver) |
| Alert Type | Audible Chime, Visual Indicator |
| Installationstype | Trådløs gør-det-selv |
| Varens vægt | 1.5 pund |
| Produktdimensioner | 6 x 3 x 13 tommer |
8. Garanti og support
8.1 Garantioplysninger
The Mighty Mule FM231 Wireless Driveway Alarm comes with a Limited 12 Month Manufacturer's Warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
8.2 Kundesupport
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Mighty Mule customer support. Refer to the packaging or the official Mighty Mule webhjemmeside for de seneste kontaktoplysninger.
9. Officielle produktvideoer
No official product videos from the seller were found that meet the specified criteria for inclusion in this manual.





