This model includes Raspberry Pi 3 and it has 20× Digital inputs, 4× Transistor outputs, 14× Relay outputs, 1× Analog output, 1× Analog input, 4× USB, 1× Ethernet 10/100 Mbps, RS485, 1-Wire bus and RTC module. More features are described in the product description.
UniPi Neuron M203 is a universal controller unit. It is a professional PLC unit with enough features for automation of more extensive projects. Neuron M203 is fit for smart home automation, building management system, energy monitoring, light industry and automation in business field.
Neuron M203 features together with digital inputs and transistor outputs also relay outputs. That makes the unit an adequate smart home server which can turn on/off central heating, boilers or lights. It has less digital inputs and relay outputs than L203.