#!/bin/sh
if [ -z $USER_MODULE_ipv4_addr ]; then
    echo Start script by systemd service or set variables
else

    if [ -x "$(command -v socat)" ]; then
        echo "start listening socket-uart services with server IP $USER_MODULE_ipv4_addr on port $USER_MODULE_kline_port"
        cmd='socat -s pty,link=/dev/ttyUM1,raw,echo=0,b19200 tcp:$USER_MODULE_ipv4_addr:$USER_MODULE_kline_port'

        if [[ -n $SOCAT_SOCKET_KLINE_MSS ]]; then
            eval $cmd,mss=$SOCAT_SOCKET_KLINE_MSS
        else
            eval $cmd
        fi
    else
        echo "socat command not available on your target or environment"
    fi
fi
exit 1