Question

I want to create something similar to Kannel, for my wavecom GSM modem using Erlang.

I found a erlang-serial project in Github, but it seems there isn’t any easy tutorial for a newbee like me.

I really need an Erlang lib that can send data to a serial port and sending AT command to my GSM modem.

Please help.

Answer 1

erlang-serial has pretty easy example in terminal.erl, basically you start the connection:

SerialPort = serial:start([{speed,Speed},{open,?DEVICE}]),
serial_listener()

Where ?DEVICE is path to linux device in /dev and serial_listener is a receive-loop like this:

serial_listner() ->
receive
{data, Bytes} ->
    %% Do something with bytes
    serial_listner()
end.

And to send data you just send message to that process:

SerialPort ! {send, Bytes}

That’s it!