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04_intro_to_sockets: update readme

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Daniel Meiburg 2024-05-17 11:38:01 +02:00
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04_intro_to_sockets/README.md
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# IO Access # Daytime TCP Server and Client
This program demonstrates how to access the GPIO pins on the Raspberry Pi using ## Description
a LED, a button and a temperature sensor.
This project implements a daytime TCP/UDP server and client.
The server listens for incoming connections and responds with the current date
and time. The client sends a message to the choosing the output format of the
date and time. The server responnds with
## Usage ## Usage
```bash ```bash
$ make $ make
# start tcp server
$ bin/daytimeTCPSrv <port>
# run tcp client
$ bin/daytimeTCPCli <server-ip> <server-port> <message>
# start udp server
$ bin/daytimeUDPSrv <port>
# run udp client
$ bin/daytimeUDPCli <server-ip> <server-port> <message>
``` ```
## Testing with nc ## Testing with nc
Clients: Start nc as a server. It will display any data it receives. The user can make
nc reply to the client by typing in the terminal.
```bash ```bash
# TCP # TCP
$ nc -l 1234 $ nc -l 1234
# UDP # UDP
$ nc -ul 1234 $ nc -ul 1234
``` ```
Start nc as a client. It will send any data it receives from the user to the
server.
```bash
# TCP
$ nc <server-ip> <server-port>
# UDP
$ nc -u <server-ip> <server-port>
```