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Arduino Mega 2560 + Ethernet Shield to Drive 8 Relays for MFJ-993b
...This is easy to determine; refer to the manual at https://mfjenterprises.com/products/mfj-993b#product-manuals
*Note for ESP32*
See https://github.com/dl9sec/MFJ-993WWRC for working with ESP32 modules. It works very well with the MFJ-993B and is a great project! Opto-Isolators are recommended rather than FETs ! Enhancements to this may appear that include additional functionality that this project incorporates.
Simple Lossless Ad-hoc Protocol (SLAP) is designed to be used for wireless digital data transfer on embedded systems. The program is built for uClinux, a derivative of Linux designed for embedded microcontrollers, but can be easily ported.