https://www.tindie.com/products/ron-sut ... over-cat5/
One of the Three boards ordered from OSHpark is now on Tindie. I placed the parts by hand and then went through these [Test].
[Test]: https://github.com/epccs/RPUpi/tree/mas ... re/Testing
Unfortunately, I do not know which boards the shield may work with (other than my RPUno and Irrigate7). The Pi Zero is powered by a 5V switch mode power supply (SMPS) on the RPUpi which takes power from the shields VIN pin, so that means the micro controller board needs to provide at least 7V on that VIN pin. In addition, the RS-422 transceivers and bus manager take up to 150mA from the +5V pin on the shield. This is asking a lot from a standard Arduino Uno so that is not a recommend board. I have some confidence that a [Ruggeduino-SE] or [RoboRED] can do the job, since they can operate with 7V - 20V on their VIN pin, and provide 150mA to the +5V pin.
[Ruggeduino-SE]: https://www.rugged-circuits.com/microco ... al-edition
Add RS-422 to a Controller node with plug for your Pi Zero
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