OBP40 V1 Documentation

Last updated Feb 09, 2026

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The OBP40 multifunction display is based on the Elecrow Crow Panel 4.2 and is used to display data from boat networks such as NMEA0183 and NMEA2000. It is primarily intended as an affordable entry-level solution for the OBP60, but its use is subject to some limitations. Without any hardware modifications to the Crow Panel 4.2, the display can be converted into an OBP40 with the appropriate firmware. Open Boat Projects provides a simple way to flash the firmware with the Web-Flashtool, requiring only a web browser and a USB cable. With optional additional hardware, data can be read from the 1-Wire bus and the I2C bus. The OBP40 includes a gateway that can exchange data bidirectionally between NMEA0183 and NMEA2000. Data can be imported and exported via Wi-Fi and used on other devices or in third-party software. Configuration is done via a web page. This allows users to select predefined display pages and define their display content. The OBP40 is based on open hardware, open software, and open data. This openness allows the device to be adapted to any requirement via the software.

Introduction

Technical data

Operation

Assembly

Programming

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