@Boy-Lenssen DR-30-24 is the power supply recommended for used for powering the big Neurons.

You need to see what is the power requirements of the device you will be using and choose the power supply accordingly. Eg. Neuron S103 requires 12W at 24VDC so people should use power supply that gives 24VDC and min 12W(0.5A). The same it is with any other device...

@Bill-Lee The protocol used on the SPI is not exactly the same as Modbus. So you should use the TCP Modbus Server that we provide (maps of registers to IOs can be found at http://downloads.unipi.technology) it will create the /dev/extcomm/x/y serial line.

The /dev/extcomm/0/0 and 1/0 both points to the same serial line (since there is only one). It is only for some developers to ease acces to it.