Custom Electronics Archives - DH-Systems.be

Tank Level Module

Hendrik — Sun, 16 Aug 2026 14:31:10 +0000

The Tank Level Module is designed to precisely monitor water and fluid levels in your custom camper setup. In an off-grid environment, standard analog level sensors often suffer from voltage drops, inaccuracies, and continuous power draw. This module acts as a robust, industrial-grade monitoring board that digitizes float sensors, NTC temperature sensors, and Dallas sensors directly at the source, communicating seamlessly via a reliable Modbus (RS485) network. Thanks to an integrated ultra-low power gate, connected sensors remain unpowered until a measurement is taken, eliminating standby drain and preventing sensor corrosion.

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🔥 🔥 Combo Pack — The Smart-Camper Essentials 🔥 🔥

Hendrik — Wed, 15 Jul 2026 17:27:56 +0000

Want to make your camper truly smart, but tired of overpriced, closed-source factory systems? With the DH Systems DIY Combo Pack, you lay down a rock-solid, automotive-proof foundation for your 12V electrical system.

This package has been carefully curated based on our years of hands-on experience on the road. With these four modules, you build exactly what you need for a fully fledged smart camper: switch high-power loads, read physical buttons, monitor your battery down to the milliampere, and let everything communicate flawlessly with Home Assistant.

What’s included in this Combo Pack?

The Master Module (The Brain) The central gateway that handles all communication. This module ensures all your data is sent quickly, safely, and stably to Home Assistant via ESPHome.
The Relay Module (Switching) Your digital fuse and switch box. Effortlessly control heavy 12V loads like your water pump, fridge, LED lights, or heater.
The Input Module (Sensing & Control) Connect physical wall switches, buttons, or water level float sensors. Control your camper with familiar physical buttons and your smartphone or touchscreen.
The Shunt Module (Battery Monitoring) Measuring is knowing. This highly precise shunt measures the exact incoming and outgoing currents of your leisure battery, so you always know exactly how long you can remain off-grid.

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Room monitor

Hendrik — Mon, 01 Jun 2026 18:13:41 +0000

The Room Monitoring module is designed to precisely track the indoor climate and presence within your smart camper network. In a compact living space, monitoring temperature, humidity, and motion is essential for automation and comfort. This module acts as a dedicated environment sensor hub, gathering real-time ambient and radar data to ensure maximum control over your climate and automated lighting or security.

It is the ideal solution for tracking interior temperature, humidity, and radar-based occupancy detection within your automation setup.

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Smartshunt

Hendrik — Mon, 01 Jun 2026 18:11:42 +0000

The Smart Shunt is designed to precisely monitor your battery bank and total power consumption within your smart camper network. In an off-grid vehicle, knowing your exact state of charge and current flow is critical to prevent unexpected power failures. This module acts as a high-precision measurement hub, tracking every milliampere entering or leaving your battery system to ensure maximum visibility of your energy reserves.

It is the ideal solution for tracking real-time battery percentage, voltage, current draw, and remaining capacity within your automation setup.

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Level and Motion

Hendrik — Mon, 01 Jun 2026 17:45:42 +0000

The Level and Motion Module is designed to precisely monitor your vehicle’s alignment and security within your smart camper network. In a camper, maintaining a level position and detecting unexpected movement is essential for comfort and safety. This module acts as an advanced sensor hub, reading real-time orientation and motion data to ensure maximum awareness of your vehicle’s physical state.

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Solar Module

Hendrik — Mon, 01 Jun 2026 17:43:42 +0000

The Solar Module is designed to safely monitor and integrate your solar power production into your smart camper network. In a vehicle setup, tracking your energy generation is crucial for efficient power management. This module acts as an intelligent data bridge, reading precise metrics from your solar setup to ensure maximum visibility of your system’s performance.

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Led Dimmer Module

Hendrik — Mon, 01 Jun 2026 17:40:58 +0000

The LED Dimmer Module is designed to safely control and dim the lighting in your smart camper network. In a vehicle, unstable voltages can cause LEDs to flicker or degrade prematurely. This module acts as a heavy-duty driver, delivering smooth PWM dimming and constant voltage to ensure maximum stability and longevity for your lights.

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Input Module

Hendrik — Mon, 01 Jun 2026 16:57:56 +0000

The Multi-Input Module is designed to safely connect external sensors, switches, and digital signals to your smart camper network. In a vehicle, electrical noise and voltage fluctuations can interfere with sensitive electronics. This module acts as a protective barrier, isolating your inputs to ensure maximum system stability.

It is the ideal solution for connecting fresh or waste water tank float switches, physical push buttons, magnetic door contacts, or security sensors to your automation setup.

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Relay Module

Hendrik — Mon, 01 Jun 2026 15:51:06 +0000

Smart and Safe Switching on the Road
The Relay Module is the ultimate expansion for any camper network ecosystem. While standard development boards often fail in a vibrating and fluctuating vehicle environment, this module is specifically developed for maximum reliability during off-grid camping. Thanks to its tight integration with the ESPHome ecosystem, you can effortlessly control heavy DC loads directly through Home Assistant.

Physical LED-Disable Switch
Sleeping comfort is essential when living in a van. That is why this module features a physical LED-Disable switch. This switch manually breaks the circuit to the status LEDs on the PCB. The module continues to run its software and perform its tasks perfectly in the background, but without any intrusive, bright lights disturbing your dark living space. Please note: this is a pure hardware current interruption, not a software-monitored entity.

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Master Unit

Hendrik — Sun, 31 May 2026 18:54:14 +0000

The Main Module is the essential central hub of your on-board electronics system. This powerful controller serves as the master of the SystemBus, bringing all your individual modules — from relay boards and PWM dimmers to smart battery monitors — together into one stable network. Thanks to seamless integration with Home Assistant via Wi-Fi or Ethernet, this module acts as the perfect translator between your physical camper hardware and your smart home dashboards.

Designed specifically for the harsh environment of a vehicle, it features robust voltage regulation, hardware protections, and industrial, vibration-resistant connectors. With the Main Module, you lay the foundation for a reliable, energy-efficient, and intelligent off-grid power grid.

Key Specifications:

Central SystemBus Interface: Direct interfaces to control and read out all your connected bus modules.

Home Assistant Ready: Native communication via MQTT or ESPHome for real-time dashboards and advanced automations.

Robust Power Circuit: Engineered to filter and stabilize the fluctuating voltages of a 12V automotive electrical system.

Compact & Industrial: Solid PCB design utilizing secure screw or push-in terminals.

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