DB9 RS23, RS422, RS485 Pinouts

RS232 to RS422 Converter Circuit

RS232 TO RS422

RS232 TO RS422

Parallel AVR Programmer Circuit

Parallel AVR Programmer Circuit

Components

| C1 100nF 

| P1 CONN_25

| P2 CONN_5X2

| R1 100K

| U1 74HCT244

| 100K R1

| 100nF C1

| 74HCT244 U1

| CONN_25 P1

| CONN_5X2 P2

RS232 - RS485 - RS232 Converter Circuits

RS232 to RS485 Converter Circuit Cable

RS485 to RS232 Converter Circuit

RS232 to RS485 Converter Circuit

RS232 to RS485 Converter Circuit

RS232 to RS485 Converter Circuit

PIC Microcontroller - Basic Circuit

How to Interface PIC16F877A / 18F452 with RS232C Serial Communication Using CCSC

Communication between a Microcontroller and a Computer is not a big thing. Use a level converter in between Microcontroller and PC. You can test it using a proteus simulation  or directly connect your hardware to PC and use Hiper Terminal for Testing

Here a Simple code for testing Serial Communication

        #include <16F877A.h>
        #DEVICE ADC=10
        #fuses HS,NOWDT,NOPROTECT,NOLVP
        #use delay(clock=20000000)
        #use rs232 (baud=9600,rcv=PIN_C7, xmit=PIN_C6)

        int count=0;
       
        void main()
        {
        while(1){

        //1 Sec Delay
        delay_ms(1000);

        //Increment Count
        count ++;
        if (count>60)
      {  count=0;}

        //Send data to PC
        printf("\n\r Count Value: %d",count);
        }
        }