Marstek Modbus Companion by Nerdiy.de - Ethernet Version
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Marstek Modbus Companion is a dedicated ESP32-based bridge that connects supported Marstek hardware to ESPHome.
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- Standard Digital File License
Build an ESPHome-based Modbus companion for Marstek battery and inverter systems.
Marstek Modbus Companion is designed as a dedicated ESP32-based bridge that communicates with supported Marstek hardware over RS485 and integrates device data and controls into Home Assistant via ESPHome. The firmware also provides local diagnostics, a web interface, and status LED feedback for installation and troubleshooting.
This product supports two firmware variants: one for Wi-Fi connectivity and one for Ethernet connectivity via a W5500 module. The code can be adapted by commenting or uncommenting the marked sections in the firmware YAML; the matching tips are documented directly in that file.
There are also two matching enclosure versions: one housing version for Wi-Fi operation and one housing version for Ethernet operation (with W5500 module).
Print settings
Filament type: Weather and UV-resistant, e.g. PETG, ABS, etc.
Layer thickness: 0.2mm
Infill: 25%
Wall lines: 5
I highly recommend to print the parts in the already defined orientation. The defined orientation is intended to maximize the structural integrity of the part.
Material list, Assembly instructions & more
You can find additional info at the following GitHub repository.
Additional Pictures
