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Abstract

A slave processor for controlling environments has a microprocessor coupled to digital inputs and outputs, to an analog-to-digital convertor connected to analog outputs, to an interface connected, and to a decoder, to a carrier current transmitter, and to a switch. The interface is connected to the serial input of the microprocessor and the switch is connected to the serial output of the microprocessor. The microprocessor is capable of retrieving at least one bit of data information from the digital inputs, retrieving a byte of data information from the analog-to-digital convertor, sending a bit of control information to the digital outputs and sending a pulse-width-modulated control signal to the carrier current transmitter in accordance with operating system instructions and applications program instructions in a first mode, and the microprocessor is capable of outputting stored applications program instructions, logged data and status information in serial form to the interface and receiving new applications program instructions in serial form from the interface in accordance with operating system instructions in a second mode.

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First Claim