baud

Serial port with RTU and TCP-to-RTU support.

Installation and Usage

  1. Add baud to your list of dependencies in mix.exs:
```elixir

def deps do

  [{:baud, "~> 0.3.0"}]

end

```
  1. Build & test it:

See NOTES for platform specific instructions on setting up your development environment.

#Serial port names are hard coded in test_helper.exs

#A couple of null modem serial ports are required

#com0com may work on Windows but not tested yet

./test.sh
  1. Use it:
```elixir

alias Baud.Enum

["COM1", "ttyUSB0", "cu.usbserial-FTYHQD9MA"] = Enum.list()

```



```elixir

#Do not prepend /dev/ to the port name

{:ok, pid} = Baud.start_link([portname: "cu.usbserial-FTYHQD9MA"])

:ok = Baud.write(pid, "Hello!\n");

{:ok, "Hi!\n"} = Baud.read(pid, 4, 400);

{:ok, "Hi!\n"} = Baud.readln(pid, 400);

{:ok, 24} = Baud.available(pid);

:ok = Baud.wait4rx(pid, 400)

:ok = Baud.discard(pid)

:ok = Baud.echo(pid)

:ok = Baud.close(pid)

```



```elixir

alias Baud.Sock

#Do not prepend /dev/ to the port name. Mode defaults to :raw

{:ok, pid} = Sock.start_link([portname: "ttyUSB0", port: 5000])

#use netcat to talk to the serial port

#nc 127.0.0.1 5000

:ok = Sock.stop(pid)    

```



```elixir

alias Baud.Sock

#Do not prepend /dev/ to the port name.

{:ok, pid} = Sock.start_link([portname: "ttyUSB0", port: 5000, mode: :rtu_tcpgw])

#modbus TCP commands sent to 127.0.0.1:5000 will be forwarded as RTU to serial port

:ok = Sock.stop(pid)    

```



```elixir    

{:ok, pid} = Baud.start_link([portname: "cu.usbserial-FTVFV143", baudrate: 57600])

#write 1 to coil at slave 2 address 3200

:ok = Baud.rtu(pid, {:wdo, 2, 3200, 1}, 400)

#write 0 to coil at slave 2 address 3200

:ok = Baud.rtu(pid, {:wdo, 2, 3200, 0}, 400)

#read 1 coil at slave 2 address 3200

{:ok, [1]} = Baud.rtu(pid, {:rdo, 2, 3200, 1}, 400)

```

Releases

Version 0.3.0

Version 0.2.0

Version 0.1.0

TODO