Remote Rs232 controller

About the device

This small device is based on Pic16f84 microprocessor. It contains a highly optimised embedded software, written in Assembly language. This software carries out different operational functions. The controller has possibility to transmit and receive different commands via RS232 line and can be directly connected to any computer's COM port. The protocol is rs232 9600 bps 8n1. It can be accessed using Hyperterminal or other program using rs232. The device echoes every sent character except the commands, which are meaningful for the processor. Using single character (0,1,2,3,4,5,6,7,8,9,? and enter) the device can sense 5 inputs and send command to 5 outputs (normally grounded). It has plenty of space for relays connected to the outputs or opto-couplers connected to the inputs allowing to sense different inputs' voltages. The device needs 5.5 to 24 volts unregulated DC power supply which can be obtained from a small transformer. The consumption of the processor is very small (less than 20mA) and the total consumption will be calculated according to the output devices connected to this unit. It is possible a remote operation to be performed via the net. The device has small diode attached directly to the supply. It indicates working state.