chatserver-mopp-udp

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chatserver-mopp-udp

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Simple chat server for [Morserino-32](https://github.com/oe1wkl/Morserino-32) using the 
[MOPP protocol](https://github.com/Morse-Code-over-IP/protocol-mopp) over UDP.

# Features
* Listens for UDP messages and rebroadcasts them to all other clients.
* empty keepalive UDP packets sent each 10 seconds to avoid NAT timeouts
  **Caution: UDP keepalive messages, while invisible, prevent your Morserino-32 from auto-shutdown!**
* number of clients is restricted (to avoid abuse)
* small delay is introduced (to avoid abuse)

# Starting the UDP server on port 7373
## Using Docker
+ You can start the server using `docker-compose up`, once you are logged into ghcr.io registry. 
+ This will also launch [frontail](https://github.com/mthenw/frontail) on port 8001.
## Using Python
+ You can start the server usin `python3 MOPP_Chat_server.py`.

# How to use it?
+ To "connect" or "make yourself known" to the server, send **hi** message from your Morserino with 20 WPM. 
  Server will respond with ":hi" with number of clients connected (1 means you're alone). 
  After that, server will resend all messages from you to all other known clients (you excluded).
+ If client is inactive (not transmitting) for too long, it will be dropped from the list. 
  This is indicated by ":bye" message sent from the server. To reconnect, send "hi" again.
+ You can also force disconnection by sending **:bye** (---... -... -.-- .).
+ You can activate / deactivate echo mode for testing purposes by sending **:EM** (---... . --). 
  The server will respond by sending you the current state, either "ON" or "OFF". 
  Usually the sending user is excluded from receiving his / her own transmissions. 
  In echo mode, own transmissions are sent back to the sending user as well. 
  This is not suitable for actual communication, but may be helpfull for testing / debugging purposes. 
  Please note that this is a server setting which affects all users.
+ When sending the command **:USR** (---... ..- ... .-.), the server will report the number of currently active users.

# Is there any demo server?
Yes, there is. You can connect your morserino to mopp.hamradio.pl:7373. Please just do not expect any high availability of this service.

# References
- Original [m32-chat-server](https://github.com/sp9wpn/m32_chat_server) by Wojtek, SP9WPN
- ReImplementation [SigBit](https://github.com/tuxintrouble/sigbit) by Sebastian Stetter, DJ5SE

chatserver-mopp-udp

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