Remote Monitoring and Control

Access your boat’s data remotely, receive alerts including voice calls in real time, and manage configured systems using Boat Monitor 32 hardware and the subscription-free mobile app — wherever connectivity is available.

The Hardware

Analogue Inputs (4 × up to 30V DC)

The analogue inputs are typically used to monitor:

  • Battery voltages

  • Alternator outputs

Analogue inputs may also be configured as additional digital inputs where required.

Digital Inputs (4 × up to 30V DC)

Digital inputs can be connected to a wide range of onboard signals, including:

  • Bilge switches

  • Bilge pumps

  • Door and hatch switches

  • Fire panel outputs

  • Bilge panel outputs

  • Heat and smoke detectors with volt free contacts

  • Engine oil pressure or alternator warning signals

  • Engine high temperature switches

  • PIR motion sensors

Digital Outputs (4 × up to 30V DC, 10A max per channel)

Configured outputs may be used to operate external devices such as:

  • Bilge pumps

  • Alarm buzzers and warning beacons

  • Heaters

  • Refrigeration systems

  • Solenoid valves

(External devices must be correctly rated and installed in accordance with manufacturer recommendations.)

Integrated Sensors

Boat Monitor 32 includes onboard sensing for:

  • 6-axis motion sensing (pitch and roll)

  • Temperature

  • Humidity

  • Atmospheric pressure

Connectivity

  • Wi-Fi connectivity for remote monitoring and alerts

  • Bluetooth connectivity for local configuration and Victron device integration

Boat Monitor 32 supports Bluetooth integration with compatible Victron devices, allowing Victron data to be viewed within the Boat Monitor 32 app when correctly configured.

Physical Specifications

  • Enclosure dimensions: 50 mm × 150 mm × 110 mm

Electrical Specifications

  • Supply voltage: 12 V DC to 30 V DC

  • Power input: Supplied via Analogue Input 1

  • Typical current consumption: approximately 30 mA at 12.5 V DC

    (approx. 0.72 Ah per day)

Data Usage

  • Typical Wi-Fi data usage: approximately 7 MB per day

    (actual usage may vary depending on configuration and update frequency)

The Software

The Boat Monitor 32 mobile app is available on the Apple App Store and Google Play Store. A compatible smartphone or tablet is required.

The app allows you to:

  • Receive alerts and notifications

  • View live system data

  • View and graph historical data

  • Manually operate configured outputs

  • Configure device settings and system behaviour

Advanced Configuration Features

The Boat Monitor 32 app includes flexible configuration tools that allow you to create custom automation logic, including:

  • Using combinations of inputs to control a single output

  • Applying on-delay and off-delay timers to output activation

  • Scheduling outputs to activate at a fixed frequency and for a fixed duration

  • Configuring notification triggers based on input states

  • Managing Wi-Fi network settings

  • Assigning custom names to inputs and outputs for easier identification

Download the Iphone / Ipad App

Download the Android App

Recent implementations.

Boat Monitor 32 has been deployed in a variety of real-world marine monitoring applications, including:

  • Monitoring auxiliary (“donkey”) engines used for seawater circulation, with remote alerts for engine stoppage, high temperature, low oil pressure and alternator fault conditions.

  • Monitoring battery voltage levels and bilge activity on unattended vessels, providing early warning of abnormal conditions.

  • Remote activation of configured auxiliary outputs where appropriate, under user control and subject to installation configuration.

  • Implementing bilge pump run-on delays to allow full water evacuation after level switches deactivate.

  • Providing local audible alarms and remote notifications when bilge pumps operate continuously for extended periods, helping identify stuck float switches or abnormal water ingress.

Installation & Setup

Full installation documentation is available online. Technical support is available to help you get the most from Boat Monitor 32, including providing installation guidance and assistance with configuration where required.

Installation requires basic marine electrical wiring knowledge. The installer is responsible for ensuring all connections are made safely and in accordance with applicable electrical standards and manufacturer recommendations.

Remote configuration assistance may be provided where possible, subject to connectivity and system access.

A typical Boat Monitor 32 installation includes a connection to the vessel’s battery bank. This provides power to the device while also enabling continuous battery voltage monitoring within the app.

Additional connections are commonly made to bilge level switches and bilge pump circuits. This allows the system to provide high water level alerts and to monitor pump run duration, helping identify abnormal operating conditions such as extended pump activity.

Boat Monitor 32 can also connect wirelessly to compatible Victron® Bluetooth devices. This enables the display of onboard Victron system data within the Boat Monitor 32 app without requiring any additional physical wiring.

The voice call and email alerts require a subscription due to the cost of the outgoing calls. All other services are subscription free.

What do I need?

Basic Electrical Wiring Skills

Basic marine electrical wiring knowledge is required for installation. At its simplest, the system requires two connections (positive and negative) to power the device. This allows the unit to operate and begin monitoring core system parameters such as battery voltage and onboard sensor data.

Internet Connectivity (Wi-Fi)

Boat Monitor 32 requires an internet connection via onboard Wi-Fi or marina Wi-Fi for remote monitoring and notifications.

If Wi-Fi is not available, a mobile 4G router or hotspot can be used. Suitable devices are widely available from approximately £30, with data plans starting from around £4 per month (provider dependent).

Mobile Device

An iOS or Android smartphone or tablet is required to use the Boat Monitor 32 companion app.

How did it come about?

A local fisherman had the problem. He needed to know when an engine that circulates water in a crab hold, on his vessel, had stopped. He wanted an alarm on his phone. This led to me developing the 1st version. Through the design I realised that the concept of having a device with a number of inputs and outputs that could be remotely configured and Boat Monitor 32 was born. Different versions were then installed on my own boat, and other local boats, as the design was further refined.

Future Development

Boat Monitor 32 is under active development and new features may be introduced over time. Current planned feature areas include:

  • GPS integration to support anchor monitoring and vessel position awareness (April ‘26)

  • Wireless sensor modules for monitoring batteries, bilge switches and door sensors without additional cabling (Summer ‘26)

  • Integration support for compatible Truma heating systems (Summer ‘26)

Planned features are subject to change and availability. If you have a suggestion or feature request, we welcome feedback and ideas from users.

About The Designer

Boat Monitor 32 has been developed by a marine electronics engineer and experienced sailor with hands-on experience working on electrical and electronic systems across a wide range of vessels.

The product has been designed, engineered and tested in real-world marine environments, with both the hardware and software developed in-house. Technical support is provided by someone with in-depth knowledge of the system and its operation.

If you have a specialist application or unique installation requirement, we are happy to discuss potential solutions.