Open Smart Kit (OSK) is a set of open source ESP32-based modules ideal for a variety of automation tasks, including home automation. All OSK modules are enclosed and support DIN rail mounting.

Open Smart Kit fills the gap between a fully DIY automation solution, which may require a lot of knowledge and effort with non-optimal results, and professional devices that are often expensive, proprietary and closed-source.

Open Smart Kit was created by programmers for programmers, so users can develop custom firmware and easily flash it without limitations. At the same time, users who don’t wish to program OSK can set it up in minutes by using a friendly, plug-and-play software like ESPHome or Home Assistant.

OSK is useful in a wide variety of situations, including but not limited to light and climate control, working with AC/DC, connecting sensors (temperature, mountain, etc.), and integrating with Home Assistant or other home IoT systems. Due to the modular and open source architecture the hardware can be improved, extended, or upgraded with new functionality and characteristics over time.

OSK Ecosystem

The Open Smart Kit ecosystem includes your choice of three useful modules:

• Relay S1 has 8 two-contact mechanical relays and 16 I/O. Using those relays, users can control up to 6 A 250 VAC or 6 A 30 VDC.

• Relay A1 has 8 solid-state relays and 16 I/O. A user can control up to 2 A 240 VAC using those relays.

• DC S1 has 6 power MOSFETs and 16 I/O. A user can control up to 6 A 48 VDC using the MOSFETs.

Features & Specifications

Features:

• Ready to use. Each module is a complete device that is ready to use out of the box. Don't worry about assembling, enclosing, or how to mount it (DIN rail compatible).
• Modular. Consists of separate PCBs that can be easily upgraded or replaced.
• Mult-protocol. Modules support Wi-Fi, Ethernet, Bluetooth, RS485, and CAN bus.
• Multiple I/O ports. Sensors can be wired directly to the module, which provides better reliability than wireless connections.
• Easy to program. Can be flashed via USB Type-C and OTA with custom firmware (Arduino/ESP-IDF) or ESPHome.
• Compatibility. Does not lock the user into a particular ecosystem. OSK can be integrated with a variety of different devices and services.
• Open source. Schematics and documentation are open and available to the end user.
• Privacy. Doesn't require a connection to the cloud. You fully control what data is requested and sent.

Specifications:

Open Documentation

We have made our schematics and documentation open and available in our Github repository.

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