OP-8100-ETH description
From embeddedTS Manuals
The optional "OP-ETH" replaces the push button and instead populates a second ethernet port. This utilizes a USB ethernet which will work with any System-on-Module.
The optional "OP-ETH" replaces the push button and instead populates a second ethernet port. This utilizes a USB ethernet which will work with any System-on-Module.