# run with: mix slave
alias Modbus.Tcp.Slave
alias Modbus.Tcp.Master

# start your slave with a shared model
model = %{0x50 => %{{:c, 0x5152} => 0}}
{:ok, spid} = Slave.start_link(model: model)
# get the assigned tcp port
port = Slave.port(spid)

# interact with it through the master
{:ok, mpid} = Master.start_link(ip: {127, 0, 0, 1}, port: port)
{:ok, [0]} = Master.exec(mpid, {:rc, 0x50, 0x5152, 1})